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piwigo_ynh/sources/include/functions.inc.php
Jimmy Monin dd76f1415b upgrade Piwigo to version 2.8.3 
add upgrade script
2016-11-26 16:25:18 +01:00

2154 lines
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<?php
// +-----------------------------------------------------------------------+
// | Piwigo - a PHP based photo gallery |
// +-----------------------------------------------------------------------+
// | Copyright(C) 2008-2016 Piwigo Team http://piwigo.org |
// | Copyright(C) 2003-2008 PhpWebGallery Team http://phpwebgallery.net |
// | Copyright(C) 2002-2003 Pierrick LE GALL http://le-gall.net/pierrick |
// +-----------------------------------------------------------------------+
// | This program is free software; you can redistribute it and/or modify |
// | it under the terms of the GNU General Public License as published by |
// | the Free Software Foundation |
// | |
// | This program is distributed in the hope that it will be useful, but |
// | WITHOUT ANY WARRANTY; without even the implied warranty of |
// | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
// | General Public License for more details. |
// | |
// | You should have received a copy of the GNU General Public License |
// | along with this program; if not, write to the Free Software |
// | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
// | USA. |
// +-----------------------------------------------------------------------+
/**
* @package functions\___
*/
include_once( PHPWG_ROOT_PATH .'include/functions_plugins.inc.php' );
include_once( PHPWG_ROOT_PATH .'include/functions_user.inc.php' );
include_once( PHPWG_ROOT_PATH .'include/functions_cookie.inc.php' );
include_once( PHPWG_ROOT_PATH .'include/functions_session.inc.php' );
include_once( PHPWG_ROOT_PATH .'include/functions_category.inc.php' );
include_once( PHPWG_ROOT_PATH .'include/functions_html.inc.php' );
include_once( PHPWG_ROOT_PATH .'include/functions_tag.inc.php' );
include_once( PHPWG_ROOT_PATH .'include/functions_url.inc.php' );
include_once( PHPWG_ROOT_PATH .'include/derivative_params.inc.php');
include_once( PHPWG_ROOT_PATH .'include/derivative_std_params.inc.php');
include_once( PHPWG_ROOT_PATH .'include/derivative.inc.php');
/**
* returns the current microsecond since Unix epoch
*
* @return int
*/
function micro_seconds()
{
$t1 = explode(' ', microtime());
$t2 = explode('.', $t1[0]);
$t2 = $t1[1].substr($t2[1], 0, 6);
return $t2;
}
/**
* returns a float value coresponding to the number of seconds since
* the unix epoch (1st January 1970) and the microseconds are precised
* e.g. 1052343429.89276600
*
* @return float
*/
function get_moment()
{
return microtime(true);
}
/**
* returns the number of seconds (with 3 decimals precision)
* between the start time and the end time given
*
* @param float $start
* @param float $end
* @return string "$TIME s"
*/
function get_elapsed_time($start, $end)
{
return number_format($end - $start, 3, '.', ' ').' s';
}
/**
* returns the part of the string after the last "."
*
* @param string $filename
* @return string
*/
function get_extension( $filename )
{
return substr( strrchr( $filename, '.' ), 1, strlen ( $filename ) );
}
/**
* returns the part of the string before the last ".".
* get_filename_wo_extension( 'test.tar.gz' ) = 'test.tar'
*
* @param string $filename
* @return string
*/
function get_filename_wo_extension( $filename )
{
$pos = strrpos( $filename, '.' );
return ($pos===false) ? $filename : substr( $filename, 0, $pos);
}
/** no option for mkgetdir() */
define('MKGETDIR_NONE', 0);
/** sets mkgetdir() recursive */
define('MKGETDIR_RECURSIVE', 1);
/** sets mkgetdir() exit script on error */
define('MKGETDIR_DIE_ON_ERROR', 2);
/** sets mkgetdir() add a index.htm file */
define('MKGETDIR_PROTECT_INDEX', 4);
/** sets mkgetdir() add a .htaccess file*/
define('MKGETDIR_PROTECT_HTACCESS', 8);
/** default options for mkgetdir() = MKGETDIR_RECURSIVE | MKGETDIR_DIE_ON_ERROR | MKGETDIR_PROTECT_INDEX */
define('MKGETDIR_DEFAULT', MKGETDIR_RECURSIVE | MKGETDIR_DIE_ON_ERROR | MKGETDIR_PROTECT_INDEX);
/**
* creates directory if not exists and ensures that directory is writable
*
* @param string $dir
* @param int $flags combination of MKGETDIR_xxx
* @return bool
*/
function mkgetdir($dir, $flags=MKGETDIR_DEFAULT)
{
if ( !is_dir($dir) )
{
global $conf;
if (substr(PHP_OS, 0, 3) == 'WIN')
{
$dir = str_replace('/', DIRECTORY_SEPARATOR, $dir);
}
$umask = umask(0);
$mkd = @mkdir($dir, $conf['chmod_value'], ($flags&MKGETDIR_RECURSIVE) ? true:false );
umask($umask);
if ($mkd==false)
{
!($flags&MKGETDIR_DIE_ON_ERROR) or fatal_error( "$dir ".l10n('no write access'));
return false;
}
if( $flags&MKGETDIR_PROTECT_HTACCESS )
{
$file = $dir.'/.htaccess';
file_exists($file) or @file_put_contents( $file, 'deny from all' );
}
if( $flags&MKGETDIR_PROTECT_INDEX )
{
$file = $dir.'/index.htm';
file_exists($file) or @file_put_contents( $file, 'Not allowed!' );
}
}
if ( !is_writable($dir) )
{
!($flags&MKGETDIR_DIE_ON_ERROR) or fatal_error( "$dir ".l10n('no write access'));
return false;
}
return true;
}
/**
* finds out if a string is in ASCII, UTF-8 or other encoding
*
* @param string $str
* @return int *0* if _$str_ is ASCII, *1* if UTF-8, *-1* otherwise
*/
function qualify_utf8($Str)
{
$ret = 0;
for ($i=0; $i<strlen($Str); $i++)
{
if (ord($Str[$i]) < 0x80) continue; # 0bbbbbbb
$ret = 1;
if ((ord($Str[$i]) & 0xE0) == 0xC0) $n=1; # 110bbbbb
elseif ((ord($Str[$i]) & 0xF0) == 0xE0) $n=2; # 1110bbbb
elseif ((ord($Str[$i]) & 0xF8) == 0xF0) $n=3; # 11110bbb
elseif ((ord($Str[$i]) & 0xFC) == 0xF8) $n=4; # 111110bb
elseif ((ord($Str[$i]) & 0xFE) == 0xFC) $n=5; # 1111110b
else return -1; # Does not match any model
for ($j=0; $j<$n; $j++)
{ # n bytes matching 10bbbbbb follow ?
if ((++$i == strlen($Str)) || ((ord($Str[$i]) & 0xC0) != 0x80))
return -1;
}
}
return $ret;
}
/**
* Remove accents from a UTF-8 or ISO-8859-1 string (from wordpress)
*
* @param string $string
* @return string
*/
function remove_accents($string)
{
$utf = qualify_utf8($string);
if ( $utf == 0 )
{
return $string; // ascii
}
if ( $utf > 0 )
{
$chars = array(
// Decompositions for Latin-1 Supplement
"\xc3\x80"=>'A', "\xc3\x81"=>'A',
"\xc3\x82"=>'A', "\xc3\x83"=>'A',
"\xc3\x84"=>'A', "\xc3\x85"=>'A',
"\xc3\x87"=>'C', "\xc3\x88"=>'E',
"\xc3\x89"=>'E', "\xc3\x8a"=>'E',
"\xc3\x8b"=>'E', "\xc3\x8c"=>'I',
"\xc3\x8d"=>'I', "\xc3\x8e"=>'I',
"\xc3\x8f"=>'I', "\xc3\x91"=>'N',
"\xc3\x92"=>'O', "\xc3\x93"=>'O',
"\xc3\x94"=>'O', "\xc3\x95"=>'O',
"\xc3\x96"=>'O', "\xc3\x99"=>'U',
"\xc3\x9a"=>'U', "\xc3\x9b"=>'U',
"\xc3\x9c"=>'U', "\xc3\x9d"=>'Y',
"\xc3\x9f"=>'s', "\xc3\xa0"=>'a',
"\xc3\xa1"=>'a', "\xc3\xa2"=>'a',
"\xc3\xa3"=>'a', "\xc3\xa4"=>'a',
"\xc3\xa5"=>'a', "\xc3\xa7"=>'c',
"\xc3\xa8"=>'e', "\xc3\xa9"=>'e',
"\xc3\xaa"=>'e', "\xc3\xab"=>'e',
"\xc3\xac"=>'i', "\xc3\xad"=>'i',
"\xc3\xae"=>'i', "\xc3\xaf"=>'i',
"\xc3\xb1"=>'n', "\xc3\xb2"=>'o',
"\xc3\xb3"=>'o', "\xc3\xb4"=>'o',
"\xc3\xb5"=>'o', "\xc3\xb6"=>'o',
"\xc3\xb9"=>'u', "\xc3\xba"=>'u',
"\xc3\xbb"=>'u', "\xc3\xbc"=>'u',
"\xc3\xbd"=>'y', "\xc3\xbf"=>'y',
// Decompositions for Latin Extended-A
"\xc4\x80"=>'A', "\xc4\x81"=>'a',
"\xc4\x82"=>'A', "\xc4\x83"=>'a',
"\xc4\x84"=>'A', "\xc4\x85"=>'a',
"\xc4\x86"=>'C', "\xc4\x87"=>'c',
"\xc4\x88"=>'C', "\xc4\x89"=>'c',
"\xc4\x8a"=>'C', "\xc4\x8b"=>'c',
"\xc4\x8c"=>'C', "\xc4\x8d"=>'c',
"\xc4\x8e"=>'D', "\xc4\x8f"=>'d',
"\xc4\x90"=>'D', "\xc4\x91"=>'d',
"\xc4\x92"=>'E', "\xc4\x93"=>'e',
"\xc4\x94"=>'E', "\xc4\x95"=>'e',
"\xc4\x96"=>'E', "\xc4\x97"=>'e',
"\xc4\x98"=>'E', "\xc4\x99"=>'e',
"\xc4\x9a"=>'E', "\xc4\x9b"=>'e',
"\xc4\x9c"=>'G', "\xc4\x9d"=>'g',
"\xc4\x9e"=>'G', "\xc4\x9f"=>'g',
"\xc4\xa0"=>'G', "\xc4\xa1"=>'g',
"\xc4\xa2"=>'G', "\xc4\xa3"=>'g',
"\xc4\xa4"=>'H', "\xc4\xa5"=>'h',
"\xc4\xa6"=>'H', "\xc4\xa7"=>'h',
"\xc4\xa8"=>'I', "\xc4\xa9"=>'i',
"\xc4\xaa"=>'I', "\xc4\xab"=>'i',
"\xc4\xac"=>'I', "\xc4\xad"=>'i',
"\xc4\xae"=>'I', "\xc4\xaf"=>'i',
"\xc4\xb0"=>'I', "\xc4\xb1"=>'i',
"\xc4\xb2"=>'IJ', "\xc4\xb3"=>'ij',
"\xc4\xb4"=>'J', "\xc4\xb5"=>'j',
"\xc4\xb6"=>'K', "\xc4\xb7"=>'k',
"\xc4\xb8"=>'k', "\xc4\xb9"=>'L',
"\xc4\xba"=>'l', "\xc4\xbb"=>'L',
"\xc4\xbc"=>'l', "\xc4\xbd"=>'L',
"\xc4\xbe"=>'l', "\xc4\xbf"=>'L',
"\xc5\x80"=>'l', "\xc5\x81"=>'L',
"\xc5\x82"=>'l', "\xc5\x83"=>'N',
"\xc5\x84"=>'n', "\xc5\x85"=>'N',
"\xc5\x86"=>'n', "\xc5\x87"=>'N',
"\xc5\x88"=>'n', "\xc5\x89"=>'N',
"\xc5\x8a"=>'n', "\xc5\x8b"=>'N',
"\xc5\x8c"=>'O', "\xc5\x8d"=>'o',
"\xc5\x8e"=>'O', "\xc5\x8f"=>'o',
"\xc5\x90"=>'O', "\xc5\x91"=>'o',
"\xc5\x92"=>'OE', "\xc5\x93"=>'oe',
"\xc5\x94"=>'R', "\xc5\x95"=>'r',
"\xc5\x96"=>'R', "\xc5\x97"=>'r',
"\xc5\x98"=>'R', "\xc5\x99"=>'r',
"\xc5\x9a"=>'S', "\xc5\x9b"=>'s',
"\xc5\x9c"=>'S', "\xc5\x9d"=>'s',
"\xc5\x9e"=>'S', "\xc5\x9f"=>'s',
"\xc5\xa0"=>'S', "\xc5\xa1"=>'s',
"\xc5\xa2"=>'T', "\xc5\xa3"=>'t',
"\xc5\xa4"=>'T', "\xc5\xa5"=>'t',
"\xc5\xa6"=>'T', "\xc5\xa7"=>'t',
"\xc5\xa8"=>'U', "\xc5\xa9"=>'u',
"\xc5\xaa"=>'U', "\xc5\xab"=>'u',
"\xc5\xac"=>'U', "\xc5\xad"=>'u',
"\xc5\xae"=>'U', "\xc5\xaf"=>'u',
"\xc5\xb0"=>'U', "\xc5\xb1"=>'u',
"\xc5\xb2"=>'U', "\xc5\xb3"=>'u',
"\xc5\xb4"=>'W', "\xc5\xb5"=>'w',
"\xc5\xb6"=>'Y', "\xc5\xb7"=>'y',
"\xc5\xb8"=>'Y', "\xc5\xb9"=>'Z',
"\xc5\xba"=>'z', "\xc5\xbb"=>'Z',
"\xc5\xbc"=>'z', "\xc5\xbd"=>'Z',
"\xc5\xbe"=>'z', "\xc5\xbf"=>'s',
// Decompositions for Latin Extended-B
"\xc8\x98"=>'S', "\xc8\x99"=>'s',
"\xc8\x9a"=>'T', "\xc8\x9b"=>'t',
// Euro Sign
"\xe2\x82\xac"=>'E',
// GBP (Pound) Sign
"\xc2\xa3"=>'');
$string = strtr($string, $chars);
}
else
{
// Assume ISO-8859-1 if not UTF-8
$chars['in'] = chr(128).chr(131).chr(138).chr(142).chr(154).chr(158)
.chr(159).chr(162).chr(165).chr(181).chr(192).chr(193).chr(194)
.chr(195).chr(196).chr(197).chr(199).chr(200).chr(201).chr(202)
.chr(203).chr(204).chr(205).chr(206).chr(207).chr(209).chr(210)
.chr(211).chr(212).chr(213).chr(214).chr(216).chr(217).chr(218)
.chr(219).chr(220).chr(221).chr(224).chr(225).chr(226).chr(227)
.chr(228).chr(229).chr(231).chr(232).chr(233).chr(234).chr(235)
.chr(236).chr(237).chr(238).chr(239).chr(241).chr(242).chr(243)
.chr(244).chr(245).chr(246).chr(248).chr(249).chr(250).chr(251)
.chr(252).chr(253).chr(255);
$chars['out'] = "EfSZszYcYuAAAAAACEEEEIIIINOOOOOOUUUUYaaaaaaceeeeiiiinoooooouuuuyy";
$string = strtr($string, $chars['in'], $chars['out']);
$double_chars['in'] = array(chr(140), chr(156), chr(198), chr(208), chr(222), chr(223), chr(230), chr(240), chr(254));
$double_chars['out'] = array('OE', 'oe', 'AE', 'DH', 'TH', 'ss', 'ae', 'dh', 'th');
$string = str_replace($double_chars['in'], $double_chars['out'], $string);
}
return $string;
}
if (function_exists('mb_strtolower') && defined('PWG_CHARSET'))
{
/**
* removes accents from a string and converts it to lower case
*
* @param string $term
* @return string
*/
function transliterate($term)
{
return remove_accents( mb_strtolower($term, PWG_CHARSET) );
}
}
else
{
/**
* @ignore
*/
function transliterate($term)
{
return remove_accents( strtolower($term) );
}
}
/**
* simplify a string to insert it into an URL
*
* @param string $str
* @return string
*/
function str2url($str)
{
$str = $safe = transliterate($str);
$str = preg_replace('/[^\x80-\xffa-z0-9_\s\'\:\/\[\],-]/','',$str);
$str = preg_replace('/[\s\'\:\/\[\],-]+/',' ',trim($str));
$res = str_replace(' ','_',$str);
if (empty($res))
{
$res = str_replace(' ','_', $safe);
}
return $res;
}
/**
* returns an array with a list of {language_code => language_name}
*
* @return string[]
*/
function get_languages()
{
$query = '
SELECT id, name
FROM '.LANGUAGES_TABLE.'
ORDER BY name ASC
;';
$result = pwg_query($query);
$languages = array();
while ($row = pwg_db_fetch_assoc($result))
{
if (is_dir(PHPWG_ROOT_PATH.'language/'.$row['id']))
{
$languages[ $row['id'] ] = $row['name'];
}
}
return $languages;
}
/**
* log the visit into history table
*
* @param int $image_id
* @param string $image_type
* @return bool
*/
function pwg_log($image_id = null, $image_type = null, $format_id = null)
{
global $conf, $user, $page;
$do_log = $conf['log'];
if (is_admin())
{
$do_log = $conf['history_admin'];
}
if (is_a_guest())
{
$do_log = $conf['history_guest'];
}
$do_log = trigger_change('pwg_log_allowed', $do_log, $image_id, $image_type);
if (!$do_log)
{
return false;
}
$tags_string = null;
if ('tags'==@$page['section'])
{
$tags_string = implode(',', $page['tag_ids']);
}
$ip = $_SERVER['REMOTE_ADDR'];
// In case of "too long" ipv6 address, we take only the 15 first chars.
//
// It would be "cleaner" to increase length of history.IP to 50 chars, but
// the alter table is very long on such a big table. We should plan this
// for a future version, once history table is kept "smaller".
if (strpos($ip,':') !== false and strlen($ip) > 15)
{
$ip = substr($ip, 0, 15);
}
$query = '
INSERT INTO '.HISTORY_TABLE.'
(
date,
time,
user_id,
IP,
section,
category_id,
image_id,
image_type,
format_id,
auth_key_id,
tag_ids
)
VALUES
(
CURRENT_DATE,
CURRENT_TIME,
'.$user['id'].',
\''.$ip.'\',
'.(isset($page['section']) ? "'".$page['section']."'" : 'NULL').',
'.(isset($page['category']['id']) ? $page['category']['id'] : 'NULL').',
'.(isset($image_id) ? $image_id : 'NULL').',
'.(isset($image_type) ? "'".$image_type."'" : 'NULL').',
'.(isset($format_id) ? $format_id : 'NULL').',
'.(isset($page['auth_key_id']) ? $page['auth_key_id'] : 'NULL').',
'.(isset($tags_string) ? "'".$tags_string."'" : 'NULL').'
)
;';
pwg_query($query);
return true;
}
/**
* Computes the difference between two dates.
* returns a DateInterval object or a stdClass with the same attributes
* http://stephenharris.info/date-intervals-in-php-5-2
*
* @param DateTime $date1
* @param DateTime $date2
* @return DateInterval|stdClass
*/
function dateDiff($date1, $date2)
{
if (version_compare(PHP_VERSION, '5.3.0') >= 0)
{
return $date1->diff($date2);
}
$diff = new stdClass();
//Make sure $date1 is ealier
$diff->invert = $date2 < $date1;
if ($diff->invert)
{
list($date1, $date2) = array($date2, $date1);
}
//Calculate R values
$R = ($date1 <= $date2 ? '+' : '-');
$r = ($date1 <= $date2 ? '' : '-');
//Calculate total days
$diff->days = round(abs($date1->format('U') - $date2->format('U'))/86400);
//A leap year work around - consistent with DateInterval
$leap_year = $date1->format('m-d') == '02-29';
if ($leap_year)
{
$date1->modify('-1 day');
}
//Years, months, days, hours
$periods = array('years'=>-1, 'months'=>-1, 'days'=>-1, 'hours'=>-1);
foreach ($periods as $period => &$i)
{
if ($period == 'days' && $leap_year)
{
$date1->modify('+1 day');
}
while ($date1 <= $date2 )
{
$date1->modify('+1 '.$period);
$i++;
}
//Reset date and record increments
$date1->modify('-1 '.$period);
}
list($diff->y, $diff->m, $diff->d, $diff->h) = array_values($periods);
//Minutes, seconds
$diff->s = round(abs($date1->format('U') - $date2->format('U')));
$diff->i = floor($diff->s/60);
$diff->s = $diff->s - $diff->i*60;
return $diff;
}
/**
* converts a string into a DateTime object
*
* @param int|string timestamp or datetime string
* @param string $format input format respecting date() syntax
* @return DateTime|false
*/
function str2DateTime($original, $format=null)
{
if (empty($original))
{
return false;
}
if ($original instanceof DateTime)
{
return $original;
}
if (!empty($format) && version_compare(PHP_VERSION, '5.3.0') >= 0)// from known date format
{
return DateTime::createFromFormat('!'.$format, $original); // ! char to reset fields to UNIX epoch
}
else
{
$t = trim($original, '0123456789');
if (empty($t)) // from timestamp
{
return new DateTime('@'.$original);
}
else // from unknown date format (assuming something like Y-m-d H:i:s)
{
$ymdhms = array();
$tok = strtok($original, '- :/');
while ($tok !== false)
{
$ymdhms[] = $tok;
$tok = strtok('- :/');
}
if (count($ymdhms)<3) return false;
if (!isset($ymdhms[3])) $ymdhms[3] = 0;
if (!isset($ymdhms[4])) $ymdhms[4] = 0;
if (!isset($ymdhms[5])) $ymdhms[5] = 0;
$date = new DateTime();
$date->setDate($ymdhms[0], $ymdhms[1], $ymdhms[2]);
$date->setTime($ymdhms[3], $ymdhms[4], $ymdhms[5]);
return $date;
}
}
}
/**
* returns a formatted and localized date for display
*
* @param int|string timestamp or datetime string
* @param array $show list of components displayed, default is ['day_name', 'day', 'month', 'year']
* THIS PARAMETER IS PLANNED TO CHANGE
* @param string $format input format respecting date() syntax
* @return string
*/
function format_date($original, $show=null, $format=null)
{
global $lang;
$date = str2DateTime($original, $format);
if (!$date)
{
return l10n('N/A');
}
if ($show === null || $show === true)
{
$show = array('day_name', 'day', 'month', 'year');
}
// TODO use IntlDateFormatter for proper i18n
$print = '';
if (in_array('day_name', $show))
$print.= $lang['day'][ $date->format('w') ].' ';
if (in_array('day', $show))
$print.= $date->format('j').' ';
if (in_array('month', $show))
$print.= $lang['month'][ $date->format('n') ].' ';
if (in_array('year', $show))
$print.= $date->format('Y').' ';
if (in_array('time', $show))
{
$temp = $date->format('H:i');
if ($temp != '00:00')
{
$print.= $temp.' ';
}
}
return trim($print);
}
/**
* Format a "From ... to ..." string from two dates
* @param string $from
* @param string $to
* @param boolean $full
* @return string
*/
function format_fromto($from, $to, $full=false)
{
$from = str2DateTime($from);
$to = str2DateTime($to);
if ($from->format('Y-m-d') == $to->format('Y-m-d'))
{
return format_date($from);
}
else
{
if ($full || $from->format('Y') != $to->format('Y'))
{
$from_str = format_date($from);
}
else if ($from->format('m') != $to->format('m'))
{
$from_str = format_date($from, array('day_name', 'day', 'month'));
}
else
{
$from_str = format_date($from, array('day_name', 'day'));
}
$to_str = format_date($to);
return l10n('from %s to %s', $from_str, $to_str);
}
}
/**
* Works out the time since the given date
*
* @param int|string timestamp or datetime string
* @param string $stop year,month,week,day,hour,minute,second
* @param string $format input format respecting date() syntax
* @param bool $with_text append "ago" or "in the future"
* @param bool $with_weeks
* @return string
*/
function time_since($original, $stop='minute', $format=null, $with_text=true, $with_week=true)
{
$date = str2DateTime($original, $format);
if (!$date)
{
return l10n('N/A');
}
$now = new DateTime();
$diff = dateDiff($now, $date);
$chunks = array(
'year' => $diff->y,
'month' => $diff->m,
'week' => 0,
'day' => $diff->d,
'hour' => $diff->h,
'minute' => $diff->i,
'second' => $diff->s,
);
// DateInterval does not contain the number of weeks
if ($with_week)
{
$chunks['week'] = (int)floor($chunks['day']/7);
$chunks['day'] = $chunks['day'] - $chunks['week']*7;
}
$j = array_search($stop, array_keys($chunks));
$print = ''; $i=0;
foreach ($chunks as $name => $value)
{
if ($value != 0)
{
$print.= ' '.l10n_dec('%d '.$name, '%d '.$name.'s', $value);
}
if (!empty($print) && $i >= $j)
{
break;
}
$i++;
}
$print = trim($print);
if ($with_text)
{
if ($diff->invert)
{
$print = l10n('%s ago', $print);
}
else
{
$print = l10n('%s in the future', $print);
}
}
return $print;
}
/**
* transform a date string from a format to another (MySQL to d/M/Y for instance)
*
* @param string $original
* @param string $format_in respecting date() syntax
* @param string $format_out respecting date() syntax
* @param string $default if _$original_ is empty
* @return string
*/
function transform_date($original, $format_in, $format_out, $default=null)
{
if (empty($original)) return $default;
$date = str2DateTime($original, $format_in);
return $date->format($format_out);
}
/**
* append a variable to _$debug_ global
*
* @param string $string
*/
function pwg_debug( $string )
{
global $debug,$t2,$page;
$now = explode( ' ', microtime() );
$now2 = explode( '.', $now[0] );
$now2 = $now[1].'.'.$now2[1];
$time = number_format( $now2 - $t2, 3, '.', ' ').' s';
$debug .= '<p>';
$debug.= '['.$time.', ';
$debug.= $page['count_queries'].' queries] : '.$string;
$debug.= "</p>\n";
}
/**
* Redirects to the given URL (HTTP method).
* once this function called, the execution doesn't go further
* (presence of an exit() instruction.
*
* @param string $url
* @return void
*/
function redirect_http( $url )
{
if (ob_get_length () !== FALSE)
{
ob_clean();
}
// default url is on html format
$url = html_entity_decode($url);
header('Request-URI: '.$url);
header('Content-Location: '.$url);
header('Location: '.$url);
exit();
}
/**
* Redirects to the given URL (HTML method).
* once this function called, the execution doesn't go further
* (presence of an exit() instruction.
*
* @param string $url
* @param string $msg
* @param integer $refresh_time
* @return void
*/
function redirect_html( $url , $msg = '', $refresh_time = 0)
{
global $user, $template, $lang_info, $conf, $lang, $t2, $page, $debug;
if (!isset($lang_info) || !isset($template) )
{
$user = build_user( $conf['guest_id'], true);
load_language('common.lang');
trigger_notify('loading_lang');
load_language('lang', PHPWG_ROOT_PATH.PWG_LOCAL_DIR, array('no_fallback'=>true, 'local'=>true) );
$template = new Template(PHPWG_ROOT_PATH.'themes', get_default_theme());
}
elseif (defined('IN_ADMIN') and IN_ADMIN)
{
$template = new Template(PHPWG_ROOT_PATH.'themes', get_default_theme());
}
if (empty($msg))
{
$msg = nl2br(l10n('Redirection...'));
}
$refresh = $refresh_time;
$url_link = $url;
$title = 'redirection';
$template->set_filenames( array( 'redirect' => 'redirect.tpl' ) );
include( PHPWG_ROOT_PATH.'include/page_header.php' );
$template->set_filenames( array( 'redirect' => 'redirect.tpl' ) );
$template->assign('REDIRECT_MSG', $msg);
$template->parse('redirect');
include( PHPWG_ROOT_PATH.'include/page_tail.php' );
exit();
}
/**
* Redirects to the given URL (automatically choose HTTP or HTML method).
* once this function called, the execution doesn't go further
* (presence of an exit() instruction.
*
* @param string $url
* @param string $msg
* @param integer $refresh_time
* @return void
*/
function redirect( $url , $msg = '', $refresh_time = 0)
{
global $conf;
// with RefeshTime <> 0, only html must be used
if ($conf['default_redirect_method']=='http'
and $refresh_time==0
and !headers_sent()
)
{
redirect_http($url);
}
else
{
redirect_html($url, $msg, $refresh_time);
}
}
/**
* returns available themes
*
* @param bool $show_mobile
* @return array
*/
function get_pwg_themes($show_mobile=false)
{
global $conf;
$themes = array();
$query = '
SELECT
id,
name
FROM '.THEMES_TABLE.'
ORDER BY name ASC
;';
$result = pwg_query($query);
while ($row = pwg_db_fetch_assoc($result))
{
if ($row['id'] == $conf['mobile_theme'])
{
if (!$show_mobile)
{
continue;
}
$row['name'] .= ' ('.l10n('Mobile').')';
}
if (check_theme_installed($row['id']))
{
$themes[ $row['id'] ] = $row['name'];
}
}
// plugins want remove some themes based on user status maybe?
$themes = trigger_change('get_pwg_themes', $themes);
return $themes;
}
/**
* check if a theme is installed (directory exsists)
*
* @param string $theme_id
* @return bool
*/
function check_theme_installed($theme_id)
{
global $conf;
return file_exists($conf['themes_dir'].'/'.$theme_id.'/'.'themeconf.inc.php');
}
/**
* Transforms an original path to its pwg representative
*
* @param string $path
* @param string $representative_ext
* @return string
*/
function original_to_representative($path, $representative_ext)
{
$pos = strrpos($path, '/');
$path = substr_replace($path, 'pwg_representative/', $pos+1, 0);
$pos = strrpos($path, '.');
return substr_replace($path, $representative_ext, $pos+1);
}
/**
* Transforms an original path to its format
*
* @param string $path
* @param string $format_ext
* @return string
*/
function original_to_format($path, $format_ext)
{
$pos = strrpos($path, '/');
$path = substr_replace($path, 'pwg_format/', $pos+1, 0);
$pos = strrpos($path, '.');
return substr_replace($path, $format_ext, $pos+1);
}
/**
* get the full path of an image
*
* @param array $element_info element information from db (at least 'path')
* @return string
*/
function get_element_path($element_info)
{
$path = $element_info['path'];
if ( !url_is_remote($path) )
{
$path = PHPWG_ROOT_PATH.$path;
}
return $path;
}
/**
* fill the current user caddie with given elements, if not already in caddie
*
* @param int[] $elements_id
*/
function fill_caddie($elements_id)
{
global $user;
$query = '
SELECT element_id
FROM '.CADDIE_TABLE.'
WHERE user_id = '.$user['id'].'
;';
$in_caddie = query2array($query, null, 'element_id');
$caddiables = array_diff($elements_id, $in_caddie);
$datas = array();
foreach ($caddiables as $caddiable)
{
$datas[] = array(
'element_id' => $caddiable,
'user_id' => $user['id'],
);
}
if (count($caddiables) > 0)
{
mass_inserts(CADDIE_TABLE, array('element_id','user_id'), $datas);
}
}
/**
* returns the element name from its filename.
* removes file extension and replace underscores by spaces
*
* @param string $filename
* @return string name
*/
function get_name_from_file($filename)
{
return str_replace('_',' ',get_filename_wo_extension($filename));
}
/**
* translation function.
* returns the corresponding value from _$lang_ if existing else the key is returned
* if more than one parameter is provided sprintf is applied
*
* @param string $key
* @param mixed $args,... optional arguments
* @return string
*/
function l10n($key)
{
global $lang, $conf;
if ( ($val=@$lang[$key]) === null)
{
if ($conf['debug_l10n'] and !isset($lang[$key]) and !empty($key))
{
trigger_error('[l10n] language key "'. $key .'" not defined', E_USER_WARNING);
}
$val = $key;
}
if (func_num_args() > 1)
{
$args = func_get_args();
$val = vsprintf($val, array_slice($args, 1));
}
return $val;
}
/**
* returns the printf value for strings including %d
* returned value is concorded with decimal value (singular, plural)
*
* @param string $singular_key
* @param string $plural_key
* @param int $decimal
* @return string
*/
function l10n_dec($singular_key, $plural_key, $decimal)
{
global $lang_info;
return
sprintf(
l10n((
(($decimal > 1) or ($decimal == 0 and $lang_info['zero_plural']))
? $plural_key
: $singular_key
)), $decimal);
}
/**
* returns a single element to use with l10n_args
*
* @param string $key translation key
* @param mixed $args arguments to use on sprintf($key, args)
* if args is a array, each values are used on sprintf
* @return string
*/
function get_l10n_args($key, $args='')
{
if (is_array($args))
{
$key_arg = array_merge(array($key), $args);
}
else
{
$key_arg = array($key, $args);
}
return array('key_args' => $key_arg);
}
/**
* returns a string formated with l10n elements.
* it is usefull to "prepare" a text and translate it later
* @see get_l10n_args()
*
* @param array $key_args one l10n_args element or array of l10n_args elements
* @param string $sep used when translated elements are concatened
* @return string
*/
function l10n_args($key_args, $sep = "\n")
{
if (is_array($key_args))
{
foreach ($key_args as $key => $element)
{
if (isset($result))
{
$result .= $sep;
}
else
{
$result = '';
}
if ($key === 'key_args')
{
array_unshift($element, l10n(array_shift($element))); // translate the key
$result .= call_user_func_array('sprintf', $element);
}
else
{
$result .= l10n_args($element, $sep);
}
}
}
else
{
fatal_error('l10n_args: Invalid arguments');
}
return $result;
}
/**
* returns the corresponding value from $themeconf if existing or an empty string
*
* @param string $key
* @return string
*/
function get_themeconf($key)
{
return $GLOBALS['template']->get_themeconf($key);
}
/**
* Returns webmaster mail address depending on $conf['webmaster_id']
*
* @return string
*/
function get_webmaster_mail_address()
{
global $conf;
$query = '
SELECT '.$conf['user_fields']['email'].'
FROM '.USERS_TABLE.'
WHERE '.$conf['user_fields']['id'].' = '.$conf['webmaster_id'].'
;';
list($email) = pwg_db_fetch_row(pwg_query($query));
$email = trigger_change('get_webmaster_mail_address', $email);
return $email;
}
/**
* Add configuration parameters from database to global $conf array
*
* @param string $condition SQL condition
* @return void
*/
function load_conf_from_db($condition = '')
{
global $conf;
$query = '
SELECT param, value
FROM '.CONFIG_TABLE.'
'.(!empty($condition) ? 'WHERE '.$condition : '').'
;';
$result = pwg_query($query);
if ((pwg_db_num_rows($result) == 0) and !empty($condition))
{
fatal_error('No configuration data');
}
while ($row = pwg_db_fetch_assoc($result))
{
$val = isset($row['value']) ? $row['value'] : '';
// If the field is true or false, the variable is transformed into a boolean value.
if ($val == 'true')
{
$val = true;
}
elseif ($val == 'false')
{
$val = false;
}
$conf[ $row['param'] ] = $val;
}
trigger_notify('load_conf', $condition);
}
/**
* Add or update a config parameter
*
* @param string $param
* @param string $value
* @param boolean $updateGlobal update global *$conf* variable
* @param callable $parser function to apply to the value before save in database
(eg: serialize, json_encode) will not be applied to *$conf* if *$parser* is *true*
*/
function conf_update_param($param, $value, $updateGlobal=false, $parser=null)
{
if ($parser != null)
{
$dbValue = call_user_func($parser, $value);
}
else if (is_array($value) || is_object($value))
{
$dbValue = addslashes(serialize($value));
}
else
{
$dbValue = boolean_to_string($value);
}
$query = '
INSERT INTO
'.CONFIG_TABLE.' (param, value)
VALUES(\''.$param.'\', \''.$dbValue.'\')
ON DUPLICATE KEY UPDATE value = \''.$dbValue.'\'
;';
pwg_query($query);
if ($updateGlobal)
{
global $conf;
$conf[$param] = $value;
}
}
/**
* Delete one or more config parameters
* @since 2.6
*
* @param string|string[] $params
*/
function conf_delete_param($params)
{
global $conf;
if (!is_array($params))
{
$params = array($params);
}
if (empty($params))
{
return;
}
$query = '
DELETE FROM '.CONFIG_TABLE.'
WHERE param IN(\''. implode('\',\'', $params) .'\')
;';
pwg_query($query);
foreach ($params as $param)
{
unset($conf[$param]);
}
}
/**
* Return a default value for a configuration parameter.
* @since 2.8
*
* @param string $param the configuration value to be extracted (if it exists)
* @param mixed $default_value the default value for the configuration value if it does not exist.
*
* @return mixed The configuration value if the variable exists, otherwise the default.
*/
function conf_get_param($param, $default_value=null)
{
global $conf;
if (isset($conf[$param]))
{
return $conf[$param];
}
return $default_value;
}
/**
* Apply *unserialize* on a value only if it is a string
* @since 2.7
*
* @param array|string $value
* @return array
*/
function safe_unserialize($value)
{
if (is_string($value))
{
return unserialize($value);
}
return $value;
}
/**
* Apply *json_decode* on a value only if it is a string
* @since 2.7
*
* @param array|string $value
* @return array
*/
function safe_json_decode($value)
{
if (is_string($value))
{
return json_decode($value, true);
}
return $value;
}
/**
* Prepends and appends strings at each value of the given array.
*
* @param array $array
* @param string $prepend_str
* @param string $append_str
* @return array
*/
function prepend_append_array_items($array, $prepend_str, $append_str)
{
array_walk(
$array,
create_function('&$s', '$s = "'.$prepend_str.'".$s."'.$append_str.'";')
);
return $array;
}
/**
* creates an simple hashmap based on a SQL query.
* choose one to be the key, another one to be the value.
* @deprecated 2.6
*
* @param string $query
* @param string $keyname
* @param string $valuename
* @return array
*/
function simple_hash_from_query($query, $keyname, $valuename)
{
return query2array($query, $keyname, $valuename);
}
/**
* creates an associative array based on a SQL query.
* choose one to be the key
* @deprecated 2.6
*
* @param string $query
* @param string $keyname
* @return array
*/
function hash_from_query($query, $keyname)
{
return query2array($query, $keyname);
}
/**
* creates a numeric array based on a SQL query.
* if _$fieldname_ is empty the returned value will be an array of arrays
* if _$fieldname_ is provided the returned value will be a one dimension array
* @deprecated 2.6
*
* @param string $query
* @param string $fieldname
* @return array
*/
function array_from_query($query, $fieldname=false)
{
if (false === $fieldname)
{
return query2array($query);
}
else
{
return query2array($query, null, $fieldname);
}
}
/**
* Return the basename of the current script.
* The lowercase case filename of the current script without extension
*
* @return string
*/
function script_basename()
{
global $conf;
foreach (array('SCRIPT_NAME', 'SCRIPT_FILENAME', 'PHP_SELF') as $value)
{
if (!empty($_SERVER[$value]))
{
$filename = strtolower($_SERVER[$value]);
if ($conf['php_extension_in_urls'] and get_extension($filename)!=='php')
continue;
$basename = basename($filename, '.php');
if (!empty($basename))
{
return $basename;
}
}
}
return '';
}
/**
* Return $conf['filter_pages'] value for the current page
*
* @param string $value_name
* @return mixed
*/
function get_filter_page_value($value_name)
{
global $conf;
$page_name = script_basename();
if (isset($conf['filter_pages'][$page_name][$value_name]))
{
return $conf['filter_pages'][$page_name][$value_name];
}
elseif (isset($conf['filter_pages']['default'][$value_name]))
{
return $conf['filter_pages']['default'][$value_name];
}
else
{
return null;
}
}
/**
* return the character set used by Piwigo
* @return string
*/
function get_pwg_charset()
{
$pwg_charset = 'utf-8';
if (defined('PWG_CHARSET'))
{
$pwg_charset = PWG_CHARSET;
}
return $pwg_charset;
}
/**
* returns the parent (fallback) language of a language.
* if _$lang_id_ is null it applies to the current language
* @since 2.6
*
* @param string $lang_id
* @return string|null
*/
function get_parent_language($lang_id=null)
{
if (empty($lang_id))
{
global $lang_info;
return !empty($lang_info['parent']) ? $lang_info['parent'] : null;
}
else
{
$f = PHPWG_ROOT_PATH.'language/'.$lang_id.'/common.lang.php';
if (file_exists($f))
{
include($f);
return !empty($lang_info['parent']) ? $lang_info['parent'] : null;
}
}
return null;
}
/**
* includes a language file or returns the content of a language file
*
* tries to load in descending order:
* param language, user language, default language
*
* @param string $filename
* @param string $dirname
* @param mixed options can contain
* @option string language - language to load
* @option bool return - if true the file content is returned
* @option bool no_fallback - if true do not load default language
* @option bool|string force_fallback - force pre-loading of another language
* default language if *true* or specified language
* @option bool local - if true load file from local directory
* @return boolean|string
*/
function load_language($filename, $dirname = '', $options = array())
{
global $user, $language_files;
// keep trace of plugins loaded files for switch_lang_to() function
if (!empty($dirname) && !empty($filename) && !@$options['return']
&& !isset($language_files[$dirname][$filename]))
{
$language_files[$dirname][$filename] = $options;
}
if (!@$options['return'])
{
$filename .= '.php';
}
if (empty($dirname))
{
$dirname = PHPWG_ROOT_PATH;
}
$dirname .= 'language/';
$default_language = (defined('PHPWG_INSTALLED') and !defined('UPGRADES_PATH')) ?
get_default_language() : PHPWG_DEFAULT_LANGUAGE;
// construct list of potential languages
$languages = array();
if (!empty($options['language']))
{ // explicit language
$languages[] = $options['language'];
}
if (!empty($user['language']))
{ // use language
$languages[] = $user['language'];
}
if (($parent = get_parent_language()) != null)
{ // parent language
// this is only for when the "child" language is missing
$languages[] = $parent;
}
if (isset($options['force_fallback']))
{ // fallback language
// this is only for when the main language is missing
if ($options['force_fallback'] === true)
{
$options['force_fallback'] = $default_language;
}
$languages[] = $options['force_fallback'];
}
if (!@$options['no_fallback'])
{ // default language
$languages[] = $default_language;
}
$languages = array_unique($languages);
// find first existing
$source_file = '';
$selected_language = '';
foreach ($languages as $language)
{
$f = @$options['local'] ?
$dirname.$language.'.'.$filename:
$dirname.$language.'/'.$filename;
if (file_exists($f))
{
$selected_language = $language;
$source_file = $f;
break;
}
}
if (!empty($source_file))
{
if (!@$options['return'])
{
// load forced fallback
if (isset($options['force_fallback']) && $options['force_fallback'] != $selected_language)
{
@include(str_replace($selected_language, $options['force_fallback'], $source_file));
}
// load language content
@include($source_file);
$load_lang = @$lang;
$load_lang_info = @$lang_info;
// access already existing values
global $lang, $lang_info;
if (!isset($lang)) $lang = array();
if (!isset($lang_info)) $lang_info = array();
// load parent language content directly in global
if (!empty($load_lang_info['parent']))
$parent_language = $load_lang_info['parent'];
else if (!empty($lang_info['parent']))
$parent_language = $lang_info['parent'];
else
$parent_language = null;
if (!empty($parent_language) && $parent_language != $selected_language)
{
@include(str_replace($selected_language, $parent_language, $source_file));
}
// merge contents
$lang = array_merge($lang, (array)$load_lang);
$lang_info = array_merge($lang_info, (array)$load_lang_info);
return true;
}
else
{
$content = @file_get_contents($source_file);
//Note: target charset is always utf-8 $content = convert_charset($content, 'utf-8', $target_charset);
return $content;
}
}
return false;
}
/**
* converts a string from a character set to another character set
*
* @param string $str
* @param string $source_charset
* @param string $dest_charset
*/
function convert_charset($str, $source_charset, $dest_charset)
{
if ($source_charset==$dest_charset)
return $str;
if ($source_charset=='iso-8859-1' and $dest_charset=='utf-8')
{
return utf8_encode($str);
}
if ($source_charset=='utf-8' and $dest_charset=='iso-8859-1')
{
return utf8_decode($str);
}
if (function_exists('iconv'))
{
return iconv($source_charset, $dest_charset.'//TRANSLIT', $str);
}
if (function_exists('mb_convert_encoding'))
{
return mb_convert_encoding( $str, $dest_charset, $source_charset );
}
return $str; // TODO
}
/**
* makes sure a index.htm protects the directory from browser file listing
*
* @param string $dir
*/
function secure_directory($dir)
{
$file = $dir.'/index.htm';
if (!file_exists($file))
{
@file_put_contents($file, 'Not allowed!');
}
}
/**
* returns a "secret key" that is to be sent back when a user posts a form
*
* @param int $valid_after_seconds - key validity start time from now
* @param string $aditionnal_data_to_hash
* @return string
*/
function get_ephemeral_key($valid_after_seconds, $aditionnal_data_to_hash = '')
{
global $conf;
$time = round(microtime(true), 1);
return $time.':'.$valid_after_seconds.':'
.hash_hmac(
'md5',
$time.substr($_SERVER['REMOTE_ADDR'],0,5).$valid_after_seconds.$aditionnal_data_to_hash,
$conf['secret_key']);
}
/**
* verify a key sent back with a form
*
* @param string $key
* @param string $aditionnal_data_to_hash
* @return bool
*/
function verify_ephemeral_key($key, $aditionnal_data_to_hash = '')
{
global $conf;
$time = microtime(true);
$key = explode( ':', @$key );
if ( count($key)!=3
or $key[0]>$time-(float)$key[1] // page must have been retrieved more than X sec ago
or $key[0]<$time-3600 // 60 minutes expiration
or hash_hmac(
'md5', $key[0].substr($_SERVER['REMOTE_ADDR'],0,5).$key[1].$aditionnal_data_to_hash, $conf['secret_key']
) != $key[2]
)
{
return false;
}
return true;
}
/**
* return an array which will be sent to template to display navigation bar
*
* @param string $url base url of all links
* @param int $nb_elements
* @param int $start
* @param int $nb_element_page
* @param bool $clean_url
* @param string $param_name
* @return array
*/
function create_navigation_bar($url, $nb_element, $start, $nb_element_page, $clean_url = false, $param_name='start')
{
global $conf;
$navbar = array();
$pages_around = $conf['paginate_pages_around'];
$start_str = $clean_url ? '/'.$param_name.'-' : (strpos($url, '?')===false ? '?':'&amp;').$param_name.'=';
if (!isset($start) or !is_numeric($start) or (is_numeric($start) and $start < 0))
{
$start = 0;
}
// navigation bar useful only if more than one page to display !
if ($nb_element > $nb_element_page)
{
$url_start = $url.$start_str;
$cur_page = $navbar['CURRENT_PAGE'] = $start / $nb_element_page + 1;
$maximum = ceil($nb_element / $nb_element_page);
$start = $nb_element_page * round( $start / $nb_element_page );
$previous = $start - $nb_element_page;
$next = $start + $nb_element_page;
$last = ($maximum - 1) * $nb_element_page;
// link to first page and previous page?
if ($cur_page != 1)
{
$navbar['URL_FIRST'] = $url;
$navbar['URL_PREV'] = $previous > 0 ? $url_start.$previous : $url;
}
// link on next page and last page?
if ($cur_page != $maximum)
{
$navbar['URL_NEXT'] = $url_start.($next < $last ? $next : $last);
$navbar['URL_LAST'] = $url_start.$last;
}
// pages to display
$navbar['pages'] = array();
$navbar['pages'][1] = $url;
for ($i = max( floor($cur_page) - $pages_around , 2), $stop = min( ceil($cur_page) + $pages_around + 1, $maximum);
$i < $stop; $i++)
{
$navbar['pages'][$i] = $url.$start_str.(($i - 1) * $nb_element_page);
}
$navbar['pages'][$maximum] = $url_start.$last;
$navbar['NB_PAGE']=$maximum;
}
return $navbar;
}
/**
* return an array which will be sent to template to display recent icon
*
* @param string $date
* @param bool $is_child_date
* @return array
*/
function get_icon($date, $is_child_date = false)
{
global $cache, $user;
if (empty($date))
{
return false;
}
if (!isset($cache['get_icon']['title']))
{
$cache['get_icon']['title'] = l10n(
'photos posted during the last %d days',
$user['recent_period']
);
}
$icon = array(
'TITLE' => $cache['get_icon']['title'],
'IS_CHILD_DATE' => $is_child_date,
);
if (isset($cache['get_icon'][$date]))
{
return $cache['get_icon'][$date] ? $icon : array();
}
if (!isset($cache['get_icon']['sql_recent_date']))
{
// Use MySql date in order to standardize all recent "actions/queries"
$cache['get_icon']['sql_recent_date'] = pwg_db_get_recent_period($user['recent_period']);
}
$cache['get_icon'][$date] = $date > $cache['get_icon']['sql_recent_date'];
return $cache['get_icon'][$date] ? $icon : array();
}
/**
* check token comming from form posted or get params to prevent csrf attacks.
* if pwg_token is empty action doesn't require token
* else pwg_token is compare to server token
*
* @return void access denied if token given is not equal to server token
*/
function check_pwg_token()
{
if (!empty($_REQUEST['pwg_token']))
{
if (get_pwg_token() != $_REQUEST['pwg_token'])
{
access_denied();
}
}
else
{
bad_request('missing token');
}
}
/**
* get pwg_token used to prevent csrf attacks
*
* @return string
*/
function get_pwg_token()
{
global $conf;
return hash_hmac('md5', session_id(), $conf['secret_key']);
}
/*
* breaks the script execution if the given value doesn't match the given
* pattern. This should happen only during hacking attempts.
*
* @param string $param_name
* @param array $param_array
* @param boolean $is_array
* @param string $pattern
* @param boolean $mandatory
*/
function check_input_parameter($param_name, $param_array, $is_array, $pattern, $mandatory=false)
{
$param_value = null;
if (isset($param_array[$param_name]))
{
$param_value = $param_array[$param_name];
}
// it's ok if the input parameter is null
if (empty($param_value))
{
if ($mandatory)
{
fatal_error('[Hacking attempt] the input parameter "'.$param_name.'" is not valid');
}
return true;
}
if ($is_array)
{
if (!is_array($param_value))
{
fatal_error('[Hacking attempt] the input parameter "'.$param_name.'" should be an array');
}
foreach ($param_value as $key => $item_to_check)
{
if (!preg_match(PATTERN_ID, $key) or !preg_match($pattern, $item_to_check))
{
fatal_error('[Hacking attempt] an item is not valid in input parameter "'.$param_name.'"');
}
}
}
else
{
if (!preg_match($pattern, $param_value))
{
fatal_error('[Hacking attempt] the input parameter "'.$param_name.'" is not valid');
}
}
}
/**
* get localized privacy level values
*
* @return string[]
*/
function get_privacy_level_options()
{
global $conf;
$options = array();
$label = '';
foreach (array_reverse($conf['available_permission_levels']) as $level)
{
if (0 == $level)
{
$label = l10n('Everybody');
}
else
{
if (strlen($label))
{
$label .= ', ';
}
$label .= l10n( sprintf('Level %d', $level) );
}
$options[$level] = $label;
}
return $options;
}
/**
* return the branch from the version. For example version 2.2.4 is for branch 2.2
*
* @param string $version
* @return string
*/
function get_branch_from_version($version)
{
return implode('.', array_slice(explode('.', $version), 0, 2));
}
/**
* return the device type: mobile, tablet or desktop
*
* @return string
*/
function get_device()
{
$device = pwg_get_session_var('device');
if (is_null($device))
{
include_once(PHPWG_ROOT_PATH.'include/mdetect.php');
$uagent_obj = new uagent_info();
if ($uagent_obj->DetectSmartphone())
{
$device = 'mobile';
}
elseif ($uagent_obj->DetectTierTablet())
{
$device = 'tablet';
}
else
{
$device = 'desktop';
}
pwg_set_session_var('device', $device);
}
return $device;
}
/**
* return true if mobile theme should be loaded
*
* @return bool
*/
function mobile_theme()
{
global $conf;
if (empty($conf['mobile_theme']))
{
return false;
}
if (isset($_GET['mobile']))
{
$is_mobile_theme = get_boolean($_GET['mobile']);
pwg_set_session_var('mobile_theme', $is_mobile_theme);
}
else
{
$is_mobile_theme = pwg_get_session_var('mobile_theme');
}
if (is_null($is_mobile_theme))
{
$is_mobile_theme = (get_device() == 'mobile');
pwg_set_session_var('mobile_theme', $is_mobile_theme);
}
return $is_mobile_theme;
}
/**
* check url format
*
* @param string $url
* @return bool
*/
function url_check_format($url)
{
if (strpos($url, '"') !== false)
{
return false;
}
if (strncmp($url, 'http://', 7) !== 0 and strncmp($url, 'https://', 8) !== 0)
{
return false;
}
return filter_var($url, FILTER_VALIDATE_URL, FILTER_FLAG_SCHEME_REQUIRED | FILTER_FLAG_HOST_REQUIRED)!==false;
}
/**
* check email format
*
* @param string $mail_address
* @return bool
*/
function email_check_format($mail_address)
{
return filter_var($mail_address, FILTER_VALIDATE_EMAIL)!==false;
}
/**
* returns the number of available comments for the connected user
*
* @return int
*/
function get_nb_available_comments()
{
global $user;
if (!isset($user['nb_available_comments']))
{
$where = array();
if ( !is_admin() )
$where[] = 'validated=\'true\'';
$where[] = get_sql_condition_FandF
(
array
(
'forbidden_categories' => 'category_id',
'forbidden_images' => 'ic.image_id'
),
'', true
);
$query = '
SELECT COUNT(DISTINCT(com.id))
FROM '.IMAGE_CATEGORY_TABLE.' AS ic
INNER JOIN '.COMMENTS_TABLE.' AS com
ON ic.image_id = com.image_id
WHERE '.implode('
AND ', $where);
list($user['nb_available_comments']) = pwg_db_fetch_row(pwg_query($query));
single_update(USER_CACHE_TABLE,
array('nb_available_comments'=>$user['nb_available_comments']),
array('user_id'=>$user['id'])
);
}
return $user['nb_available_comments'];
}
/**
* Compare two versions with version_compare after having converted
* single chars to their decimal values.
* Needed because version_compare does not understand versions like '2.5.c'.
* @since 2.6
*
* @param string $a
* @param string $b
* @param string $op
*/
function safe_version_compare($a, $b, $op=null)
{
$replace_chars = create_function('$m', 'return ord(strtolower($m[1]));');
// add dot before groups of letters (version_compare does the same thing)
$a = preg_replace('#([0-9]+)([a-z]+)#i', '$1.$2', $a);
$b = preg_replace('#([0-9]+)([a-z]+)#i', '$1.$2', $b);
// apply ord() to any single letter
$a = preg_replace_callback('#\b([a-z]{1})\b#i', $replace_chars, $a);
$b = preg_replace_callback('#\b([a-z]{1})\b#i', $replace_chars, $b);
if (empty($op))
{
return version_compare($a, $b);
}
else
{
return version_compare($a, $b, $op);
}
}
?>
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