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limesurvey_ynh/sources/application/libraries/Date_Time_Converter.php

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<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
* Date and Time Converter by Elac v0.9.3
* elacdude@gmail.com
* www.elacdude.com
*
* You are free to use this code free of charge, modify it, and distrubute it,
* just leave this comment block at the top of this file.
*
*
* Changes/Modifications
* 6/24/08 - Version 0.9.2 released. Minor additions
* - Added "S" support. (th, rd, st, nd. example: 5th)
* - Added a few more abbreviations for units of time in calculate() (s. sec. secs. min. mins. m. and more)
* - Added example.php (php examples and usage) and date_time_formats.html (list of supported date/time formats) to the package.
* 6/25/08 - Version 0.9.3 released. Bug fixes
* - Fixed month subtraction (wrap to previous year) bug
* - Fixed month and year "$only_return_the_value=true" bug. If you calculated by months or years, and set
* $only_return_the_value=true, it would overwrite the values instead of just returning them.
* - Fixed the "D" (Sun, Mon, Tue) bug. If you supplied "D" and "d" in the same mask, it would not return the correct output.
* - Changed the names of public variables "day", "month", and "year" added "s" at the end for consistency purposes
* 11/14/08 - Version 0.9.4 released. Bug fix
* - Got rid of the _one_dig_num function and used ltrim($num "0") instead
*/
class Date_Time_Converter
{
/* PUBLIC VARIABLES */
public $date_time_stamp; //the date to be calculated in timestamp format
public $date_time; //the date to be calculated. ex: 12/30/2008 17:40:00
public $date_time_mask; //the php date() style format that $date_time is in. ex: m/d/Y H:i:s
public $seconds;
public $minutes;
public $hours;
public $days;
public $months;
public $years;
public $ampm;
/* CONSTRUCTOR and DESTRUCTOR */
/** Constructor. This is where you supply the date. Accepts almost any format of
* date as long as you supply the correct mask. DOES accept dates
* without leading zeros (n,j,g,G) as long as they aren't bunched together.
* ie: ("1152008", "njY") wont work; ("1/15/2008", "n/j/2008") will work.
* Example: $obj = new Date_Time_Calc('12/30/2008 17:40:00', 'm/d/Y H:i:s'); */
public function __construct($sDate, $sFormat) {
require_once(APPPATH . '/helpers/adodb/adodb-time.inc_helper.php');
$this->_default_date_time_units(); //set date&time units to default values
$this->date_time = $sDate;
$this->date_time_mask = $sFormat;
//convert date to timestamp
$this->date_time_stamp = $this->_date_to_timestamp($sDate, $sFormat);
}
public function __destruct() {
unset($this->date_time_stamp);
unset($this->date_time);
unset($this->date_time_mask);
unset($this->seconds);
unset($this->minutes);
unset($this->hours);
unset($this->days);
unset($this->months);
unset($this->years);
unset($this->ampm);
}
/* PRIVATE FUNCTIONS */
/** Private Function. Resets date and time unit variables to default
*/
private function _default_date_time_units() {
$this->seconds = '00';
$this->minutes = '00';
$this->hours = '00';
$this->days = '01';
$this->months = '01';
$this->years = '1970';
$this->ampm = 'am';
}
/** Private Function. Converts a textual month into a digit. Accepts almost any
* textual format of a month including abbreviations.
* Example: _month_num("jan"); //returns '1' Example2: _month_num("january", true); //returns '01'
*/
private function _month_num($themonth, $return_two_digit=false) {
switch (strtolower($themonth)) {
case 'jan':
case 'jan.';
case 'january':
return ($return_two_digit == true ? '01': '1');
break;
case 'feb':
case 'feb.':
case 'february':
case 'febuary':
return ($return_two_digit == true ? '02': '2');
break;
case 'mar':
case 'mar.':
case 'march':
return ($return_two_digit == true ? '03': '3');
break;
case 'apr':
case 'apr.':
case 'april':
return ($return_two_digit == true ? '04': '4');
break;
case 'may':
case 'may.':
return ($return_two_digit == true ? '05': '5');
break;
case 'jun':
case 'jun.':
case 'june':
return ($return_two_digit == true ? '06': '6');
break;
case 'jul':
case 'jul.':
case 'july':
return ($return_two_digit == true ? '07': '7');
break;
case 'aug':
case 'aug.':
case 'august':
return ($return_two_digit == true ? '08': '8');
break;
case 'sep':
case 'sep.':
case 'sept':
case 'sept.':
case 'september':
return ($return_two_digit == true ? '09': '9');
break;
case 'oct':
case 'oct.':
case 'october':
return '10';
break;
case 'nov':
case 'nov.':
case 'november':
return '11';
break;
case 'dec':
case 'dec.':
case 'december':
return '12';
break;
default:
return false;
break;
}
}
/** Private Function. Converts a date into a timestamp. Accepts almost any
* format of date as long as you supply the correct mask. DOES accept dates
* without leading zeros (n,j,g,G) as long as they aren't bunched together.
* ie: ("1152008", "njY") wont work; ("1/15/2008", "n/j/2008") will work
*/
private function _date_to_timestamp($thedate, $mask) {
$mask_orig = $mask;
// define the valid values that we will use to check
// value => length
$all = array(
//time
's' => 'ss', // Seconds, with leading zeros
'i' => 'ii', // Minutes with leading zeros
'H' => 'HH', // 24-hour format of an hour with leading zeros
'h' => 'hh', // 12-hour format of an hour with leading zeros
'G' => 'GG', // 24-hour format of an hour without leading zeros
'g' => 'gg', // 12-hour format of an hour without leading zeros
'A' => 'AA', // Uppercase Ante meridiem and Post meridiem
'a' => 'aa', // Lowercase Ante meridiem and Post meridiem
//year
'y' => 'yy', // A full numeric representation of a year, 4 digits
'Y' => 'YYYY', // A two digit representation of a year
//month
'm' => 'mm', // A numeric representation of a month with leading zeros.
'M' => 'MMM', // A textual representation of a month. 3 letters. ex: Jan, Feb, Mar, Apr...
'n' => 'nn', // Numeric representation of a month, without leading zeros
//days
'd' => 'dd', // Day of the month, 2 digits with leading zeros
'j' => 'jj', // Day of the month without leading zeros
'S' => 'SS', // English ordinal suffix for the day of the month, 2 characters (st, nd, rd, or th. works well with j)
'D' => 'DDD' // Textual representation of day of the week (Sun, Mon, Tue, Wed)
);
// this will give us a mask with full length fields
$mask = str_replace(array_keys($all), $all, $mask);
$vals = array();
//loop through each character of $mask starting at the beginning
for ($i=0; $i<strlen($mask_orig); $i++) {
//get the current character
$thischar = substr($mask_orig, $i, 1);
//if the character is not in the $all array, skip it
if (array_key_exists($thischar, $all)) {
$type = $thischar;
$chars = $all[$type];
// get position of the current char
if(($pos = strpos($mask, $chars)) === false)
continue;
// find the value from $thedate
$val = substr(trim($thedate), $pos, strlen($chars));
/* START FIX FOR UNITS WITHOUT LEADING ZEROS */
if ($type == "n" || $type == "j" || $type == "g" || $type == "G") {
//if its not numeric, try a shorter digit
if (!is_numeric($val) || strval(intval($val))!==$val) {
$val = substr($thedate, $pos, strlen($chars)-1);
$mask = str_replace($chars, $type, $mask);
} else {
//try numeric value checking
switch ($type) {
case "n":
if ($val > 12 || $val < 1) { //month must be between 1-12
$val = substr($thedate, $pos, strlen($chars)-1);
$mask = str_replace($chars, $type, $mask);
}
break;
case "j":
if ($val > 31 || $val < 1) { //day must be between 1-31
$val = substr($thedate, $pos, strlen($chars)-1);
$mask = str_replace($chars, $type, $mask);
}
break;
case "g":
if ($val > 12 || $val < 1) { //day must be between 1-12
$val = substr($thedate, $pos, strlen($chars)-1);
$mask = str_replace($chars, $type, $mask);
}
break;
case "G":
if ($val > 24 || $val < 1) { //day must be between 1-24
$val = substr($thedate, $pos, strlen($chars)-1);
$mask = str_replace($chars, $type, $mask);
}
break;
}
}
}
/* END FIX FOR UNITS WITHOUT LEADING ZEROS */
//save this value
$vals[$type] = $val;
}
}
foreach($vals as $type => $val) {
switch($type) {
case 's' :
$this->seconds = $val;
break;
case 'i' :
$this->minutes = $val;
break;
case 'H':
case 'h':
$this->hours = $val;
break;
case 'A':
case 'a':
$this->ampm = $val;
break;
case 'y':
$this->years = '20'.$val;
break;
case 'Y':
$this->years = $val;
break;
case 'm':
$this->months = $val;
break;
case 'M':
$this->months = $this->_month_num($val, true);
break;
case 'd':
$this->days = $val;
break;
//ones without leading zeros:
case 'n':
$this->months = $val;
break;
case 'j':
$this->days = $val;
break;
case 'g':
$this->hours = $val;
break;
case 'G':
$this->hours = $val;
break;
}
}
if (strtolower($this->ampm) == "pm") {$this->hours = $this->hours + 12;} //if its pm, add 12 hours
$make_stamp = adodb_mktime( (int)ltrim($this->hours, "0"), (int)ltrim($this->minutes, "0"),
(int)ltrim($this->seconds, "0"), (int)ltrim($this->months, "0"),
(int)ltrim($this->days, "0"), (int)ltrim($this->years, "0"));
return $make_stamp;
}
/** PUBLIC FUNCTIONS */
/** Sets a new format/mask for the date using the php date() style formatting
* Example: $obj->convert("M j Y H:i:s A");
*/
public function convert($new_mask, $save=true) {
$newdate = adodb_date($new_mask, $this->date_time_stamp);
//if they want to save and apply this new mask to $this->date_time, save it
if ($save == true) {
$this->date_time_mask = $new_mask;
$this->date_time = $newdate;
}
return $newdate;
}
/** Changes the date to a new one.
* Example: $obj->set_date_time('11/20/2005 07:40:00 AM', 'm/d/Y H:i:s A');
*/
public function set_date_time($start_date_time, $mask) {
$this->__construct($start_date_time, $mask);
}
}
?>
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