diff --git a/scripts/_common.sh b/scripts/_common.sh
index 262aecc..b2fe000 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -2,15 +2,698 @@
 #=================================================
 # COMMON VARIABLES
 #=================================================
+
+pkg_dependencies="acl tar at"
+
 YNH_PHP_VERSION="7.2"
-extra_pkg_dependencies="php${YNH_PHP_VERSION}-bz2 php${YNH_PHP_VERSION}-imap php${YNH_PHP_VERSION}-gmp php${YNH_PHP_VERSION}-gd php${YNH_PHP_VERSION}-json php${YNH_PHP_VERSION}-intl php${YNH_PHP_VERSION}-curl php${YNH_PHP_VERSION}-apcu php${YNH_PHP_VERSION}-redis php${YNH_PHP_VERSION}-zip php${YNH_PHP_VERSION}-mbstring php${YNH_PHP_VERSION}-xml php${YNH_PHP_VERSION}-sqlite3"
+extra_pkg_dependencies="php${YNH_PHP_VERSION}-bz2 php${YNH_PHP_VERSION}-imap php${YNH_PHP_VERSION}-gmp php${YNH_PHP_VERSION}-gd php${YNH_PHP_VERSION}-json php${YNH_PHP_VERSION}-intl php${YNH_PHP_VERSION}-curl php${YNH_PHP_VERSION}-apcu php${YNH_PHP_VERSION}-redis php${YNH_PHP_VERSION}-ldap php${YNH_PHP_VERSION}-imagick php${YNH_PHP_VERSION}-zip php${YNH_PHP_VERSION}-mbstring php${YNH_PHP_VERSION}-xml php${YNH_PHP_VERSION}-mysql php${YNH_PHP_VERSION}-sqlite3"
+
+#=================================================
+# EXPERIMENTAL HELPERS
+#=================================================
+
+# Execute a command as another user
+# usage: exec_as USER COMMAND [ARG ...]
+exec_as() {
+  local USER=$1
+  shift 1
+
+  if [[ $USER = $(whoami) ]]; then
+    eval "$@"
+  else
+    sudo -u "$USER" "$@"
+  fi
+}
+
+#=================================================
+
+# Check if an URL is already handled
+# usage: is_url_handled --domain=DOMAIN --path=PATH_URI
+is_url_handled() {
+    # Declare an array to define the options of this helper.
+    local legacy_args=dp
+    declare -Ar args_array=( [d]=domain= [p]=path= )
+    local domain
+    local path
+    # Manage arguments with getopts
+    ynh_handle_getopts_args "$@"
+
+    # Try to get the url with curl, and keep the http code and an eventual redirection url.
+    local curl_output="$(curl --insecure --silent --output /dev/null \
+      --write-out '%{http_code};%{redirect_url}' https://127.0.0.1$path --header "Host: $domain" --resolve $domain:443:127.0.0.1)"
+
+    # Cut the output and keep only the first part to keep the http code
+    local http_code="${curl_output%%;*}"
+    # Do the same thing but keep the second part, the redirection url
+    local redirection="${curl_output#*;}"
+
+    # Return 1 if the url isn't handled.
+    # Which means either curl got a 404 (or the admin) or the sso.
+    # A handled url should redirect to a publicly accessible url.
+    # Return 1 if the url has returned 404
+    if [ "$http_code" = "404" ] || [[ $redirection =~ "/yunohost/admin" ]]; then
+        return 1
+    # Return 1 if the url is redirected to the SSO
+    elif [[ $redirection =~ "/yunohost/sso" ]]; then
+        return 1
+    fi
+}
+
+#=================================================
+
+# Make the main steps to migrate an app to its fork.
+#
+# This helper has to be used for an app which needs to migrate to a new name or a new fork
+# (like owncloud to nextcloud or zerobin to privatebin).
+#
+# This helper will move the files of an app to its new name
+# or recreate the things it can't move.
+#
+# To specify which files it has to move, you have to create a "migration file", stored in ../conf
+# This file is a simple list of each file it has to move,
+# except that file names must reference the $app variable instead of the real name of the app,
+# and every instance-specific variables (like $domain).
+# $app is especially important because it's this variable which will be used to identify the old place and the new one for each file.
+#
+# If a database exists for this app, it will be dumped and then imported in a newly created database, with a new name and new user.
+# Don't forget you have to then apply these changes to application-specific settings (depends on the packaged application)
+#
+# Same things for an existing user, a new one will be created.
+# But the old one can't be removed unless it's not used. See below.
+#
+# If you have some dependencies for your app, it's possible to change the fake debian package which manages them.
+# You have to fill the $pkg_dependencies variable, and then a new fake package will be created and installed,
+# and the old one will be removed.
+# If you don't have a $pkg_dependencies variable, the helper can't know what the app dependencies are.
+#
+# The app settings.yml will be modified as follows:
+# - finalpath will be changed according to the new name (but only if the existing $final_path contains the old app name)
+# - The checksums of php-fpm and nginx config files will be updated too.
+# - If there is a $db_name value, it will be changed.
+# - And, of course, the ID will be changed to the new name too.
+#
+# Finally, the $app variable will take the value of the new name.
+# The helper will set the $migration_process variable to 1 if a migration has been successfully handled.
+#
+# You have to handle by yourself all the migrations not done by this helper, like configuration or special values in settings.yml
+# Also, at the end of the upgrade script, you have to add a post_migration script to handle all the things the helper can't do during YunoHost upgrade (mostly for permission reasons),
+# especially remove the old user, move some hooks and remove the old configuration directory
+# To launch this script, you have to move it elsewhere and start it after the upgrade script.
+# `cp ../conf/$script_post_migration /tmp`
+# `(cd /tmp; echo "/tmp/$script_post_migration" | at now + 2 minutes)`
+#
+# usage: ynh_handle_app_migration migration_id migration_list
+# | arg: migration_id  - ID from which to migrate
+# | arg: migration_list - File specifying every file to move (one file per line)
+ynh_handle_app_migration ()  {
+  #=================================================
+  # LOAD SETTINGS
+  #=================================================
+
+  old_app=$YNH_APP_INSTANCE_NAME
+  local old_app_id=$YNH_APP_ID
+  local old_app_number=$YNH_APP_INSTANCE_NUMBER
+
+  # Get the id from which to migrate
+  local migration_id="$1"
+  # And the file with the paths to move
+  local migration_list="$2"
+
+  # Get the new app id in the manifest
+  local new_app_id=$(grep \"id\": ../manifest.json | cut -d\" -f4)
+  if [ $old_app_number -eq 1 ]; then
+    local new_app=$new_app_id
+  else
+    local new_app=${new_app_id}__${old_app_number}
+  fi
+
+  #=================================================
+  # CHECK IF IT HAS TO MIGRATE
+  #=================================================
+
+  migration_process=0
+
+  if [ "$old_app_id" == "$new_app_id" ]
+  then
+    # If the 2 id are the same
+    # No migration to do.
+    echo 0
+    return 0
+  else
+    if [ "$old_app_id" != "$migration_id" ]
+    then
+        # If the new app is not the authorized id, fail.
+        ynh_die "Incompatible application for migration from $old_app_id to $new_app_id"
+    fi
+
+    echo "Migrate from $old_app_id to $new_app_id" >&2
+
+    #=================================================
+    # CHECK IF THE MIGRATION CAN BE DONE
+    #=================================================
+
+    # TODO Handle multi instance apps...
+    # Check that there is not already an app installed for this id.
+    (yunohost app list --installed -f "$new_app" | grep -q id) \
+    && ynh_die "$new_app is already installed"
+
+    #=================================================
+    # CHECK THE LIST OF FILES TO MOVE
+    #=================================================
+
+    local temp_migration_list="$(tempfile)"
+
+    # Build the list by removing blank lines and comment lines
+    sed '/^#.*\|^$/d' "../conf/$migration_list" > "$temp_migration_list"
+
+    # Check if there is no file in the destination
+    local file_to_move=""
+    while read file_to_move
+    do
+        # Replace all occurences of $app by $new_app in each file to move.
+        local move_to_destination="${file_to_move//\$app/$new_app}"
+        test -e "$move_to_destination" && ynh_die "A file named $move_to_destination already exists."
+    done < "$temp_migration_list"
+
+    #=================================================
+    # COPY YUNOHOST SETTINGS FOR THIS APP
+    #=================================================
+
+    local settings_dir="/etc/yunohost/apps"
+    cp -a "$settings_dir/$old_app" "$settings_dir/$new_app"
+
+    # Replace the old id by the new one
+    ynh_replace_string "\(^id: .*\)$old_app" "\1$new_app" "$settings_dir/$new_app/settings.yml"
+    # INFO: There a special behavior with yunohost app setting:
+    # if the id given in argument does not match with the id
+    # stored in the config file, the config file will be purged.
+    # That's why we use sed instead of app setting here.
+    # https://github.com/YunoHost/yunohost/blob/c6b5284be8da39cf2da4e1036a730eb5e0515096/src/yunohost/app.py#L1316-L1321
+
+    # Change the label if it's simply the name of the app
+    old_label=$(ynh_app_setting_get $new_app label)
+    if [ "${old_label,,}" == "$old_app_id" ]
+    then
+        # Build the new label from the id of the app. With the first character as upper case
+        new_label=$(echo $new_app_id | cut -c1 | tr [:lower:] [:upper:])$(echo $new_app_id | cut -c2-)
+        ynh_app_setting_set $new_app label $new_label
+    fi
+
+    #=================================================
+    # MOVE FILES TO THE NEW DESTINATION
+    #=================================================
+
+    while read file_to_move
+    do
+        # Replace all occurence of $app by $new_app in each file to move.
+        move_to_destination="$(eval echo "${file_to_move//\$app/$new_app}")"
+        local real_file_to_move="$(eval echo "${file_to_move//\$app/$old_app}")"
+        echo "Move file $real_file_to_move to $move_to_destination" >&2
+        mv "$real_file_to_move" "$move_to_destination"
+    done < "$temp_migration_list"
+
+    #=================================================
+    # UPDATE SETTINGS KNOWN ENTRIES
+    #=================================================
+
+    # Replace nginx checksum
+    ynh_replace_string "\(^checksum__etc_nginx.*\)_$old_app" "\1_$new_app/" "$settings_dir/$new_app/settings.yml"
+
+    # Replace php5-fpm checksums
+    ynh_replace_string "\(^checksum__etc_php5.*[-_]\)$old_app" "\1$new_app/" "$settings_dir/$new_app/settings.yml"
+
+    # Replace final_path
+    ynh_replace_string "\(^final_path: .*\)$old_app" "\1$new_app" "$settings_dir/$new_app/settings.yml"
+
+    #=================================================
+    # MOVE THE DATABASE
+    #=================================================
+
+    db_pwd=$(ynh_app_setting_get $old_app mysqlpwd)
+    db_name=$(ynh_app_setting_get $old_app db_name)
+
+    # Check if a database exists before trying to move it
+    local mysql_root_password=$(cat $MYSQL_ROOT_PWD_FILE)
+    if [ -n "$db_name" ] && mysqlshow -u root -p$mysql_root_password | grep -q "^| $db_name"
+    then
+        new_db_name=$(ynh_sanitize_dbid $new_app)
+        echo "Rename the database $db_name to $new_db_name" >&2
+
+        local sql_dump="/tmp/${db_name}-$(date '+%s').sql"
+
+        # Dump the old database
+        ynh_mysql_dump_db "$db_name" > "$sql_dump"
+
+        # Create a new database
+        ynh_mysql_setup_db $new_db_name $new_db_name $db_pwd
+        # Then restore the old one into the new one
+        ynh_mysql_connect_as $new_db_name $db_pwd $new_db_name < "$sql_dump"
+
+        # Remove the old database
+        ynh_mysql_remove_db $db_name $db_name
+        # And the dump
+        ynh_secure_remove "$sql_dump"
+
+        # Update the value of $db_name
+        db_name=$new_db_name
+        ynh_app_setting_set $new_app db_name $db_name
+    fi
+
+    #=================================================
+    # CREATE A NEW USER
+    #=================================================
+
+    # Check if the user exists on the system
+    if ynh_system_user_exists "$old_app"
+    then
+      echo "Create a new user $new_app to replace $old_app" >&2
+      ynh_system_user_create $new_app
+    fi
+
+    #=================================================
+    # CHANGE THE FAKE DEPENDENCIES PACKAGE
+    #=================================================
+
+    # Check if a variable $pkg_dependencies exists
+    # If this variable doesn't exist, this part shall be managed in the upgrade script.
+    if [ -n "${pkg_dependencies:-}" ]
+    then
+      # Define the name of the package
+      local old_package_name="${old_app//_/-}-ynh-deps"
+      local new_package_name="${new_app//_/-}-ynh-deps"
+
+      if ynh_package_is_installed "$old_package_name"
+      then
+        # Install a new fake package
+        app=$new_app
+        ynh_install_app_dependencies $pkg_dependencies
+        # Then remove the old one
+        app=$old_app
+        ynh_remove_app_dependencies
+      fi
+    fi
+
+    #=================================================
+    # UPDATE THE ID OF THE APP
+    #=================================================
+
+    app=$new_app
+
+
+    # Set migration_process to 1 to inform that an upgrade has been made
+    migration_process=1
+  fi
+}
+
+#=================================================
+
+# Check available space before creating a temp directory.
+#
+# usage: ynh_smart_mktemp --min_size="Min size"
+#
+# | arg: -s, --min_size= - Minimal size needed for the temporary directory, in Mb
+ynh_smart_mktemp () {
+        # Declare an array to define the options of this helper.
+        declare -Ar args_array=( [s]=min_size= )
+        local min_size
+        # Manage arguments with getopts
+        ynh_handle_getopts_args "$@"
+
+        min_size="${min_size:-300}"
+        # Transform the minimum size from megabytes to kilobytes
+        min_size=$(( $min_size * 1024 ))
+
+        # Check if there's enough free space in a directory
+        is_there_enough_space () {
+                local free_space=$(df --output=avail "$1" | sed 1d)
+                test $free_space -ge $min_size
+        }
+
+        if is_there_enough_space /tmp; then
+                local tmpdir=/tmp
+        elif is_there_enough_space /var; then
+                local tmpdir=/var
+        elif is_there_enough_space /; then
+                local tmpdir=/
+        elif is_there_enough_space /home; then
+                local tmpdir=/home
+        else
+                ynh_die "Insufficient free space to continue..."
+        fi
+
+        echo "$(sudo mktemp --directory --tmpdir="$tmpdir")"
+}
+
+#=================================================
+
+# Check the amount of available RAM
+#
+# usage: ynh_check_ram [--required=RAM required in Mb] [--no_swap|--only_swap] [--free_ram]
+# | arg: -r, --required= - Amount of RAM required in Mb. The helper will return 0 is there's enough RAM, or 1 otherwise.
+# If --required isn't set, the helper will print the amount of RAM, in Mb.
+# | arg: -s, --no_swap   - Ignore swap
+# | arg: -o, --only_swap - Ignore real RAM, consider only swap.
+# | arg: -f, --free_ram  - Count only free RAM, not the total amount of RAM available.
+ynh_check_ram () {
+  # Declare an array to define the options of this helper.
+  declare -Ar args_array=( [r]=required= [s]=no_swap [o]=only_swap [f]=free_ram )
+  local required
+  local no_swap
+  local only_swap
+  # Manage arguments with getopts
+  ynh_handle_getopts_args "$@"
+  required=${required:-}
+  no_swap=${no_swap:-0}
+  only_swap=${only_swap:-0}
+
+  local total_ram=$(vmstat --stats --unit M | grep "total memory" | awk '{print $1}')
+  local total_swap=$(vmstat --stats --unit M | grep "total swap" | awk '{print $1}')
+  local total_ram_swap=$(( total_ram + total_swap ))
+
+  local free_ram=$(vmstat --stats --unit M | grep "free memory" | awk '{print $1}')
+  local free_swap=$(vmstat --stats --unit M | grep "free swap" | awk '{print $1}')
+  local free_ram_swap=$(( free_ram + free_swap ))
+
+  # Use the total amount of ram
+  local ram=$total_ram_swap
+  if [ $free_ram -eq 1 ]
+  then
+    # Use the total amount of free ram
+    ram=$free_ram_swap
+    if [ $no_swap -eq 1 ]
+    then
+      # Use only the amount of free ram
+      ram=$free_ram
+    elif [ $only_swap -eq 1 ]
+    then
+      # Use only the amount of free swap
+      ram=$free_swap
+    fi
+  else
+    if [ $no_swap -eq 1 ]
+    then
+      # Use only the amount of free ram
+      ram=$total_ram
+    elif [ $only_swap -eq 1 ]
+    then
+      # Use only the amount of free swap
+      ram=$total_swap
+    fi
+  fi
+
+  if [ -n "$required" ]
+  then
+    # Return 1 if the amount of ram isn't enough.
+    if [ $ram -lt $required ]
+    then
+      return 1
+    else
+      return 0
+    fi
+
+  # If no RAM is required, return the amount of available ram.
+  else
+    echo $ram
+  fi
+}
+
+#=================================================
+
+# Define the values to configure php-fpm
+#
+# usage: ynh_get_scalable_phpfpm --usage=usage --footprint=footprint [--print]
+# | arg: -f, --footprint      - Memory footprint of the service (low/medium/high).
+# low    - Less than 20Mb of ram by pool.
+# medium - Between 20Mb and 40Mb of ram by pool.
+# high   - More than 40Mb of ram by pool.
+# Or specify exactly the footprint, the load of the service as Mb by pool instead of having a standard value.
+# To have this value, use the following command and stress the service.
+# watch -n0.5 ps -o user,cmd,%cpu,rss -u APP
+#
+# | arg: -u, --usage     - Expected usage of the service (low/medium/high).
+# low    - Personal usage, behind the sso.
+# medium - Low usage, few people or/and publicly accessible.
+# high   - High usage, frequently visited website.
+#
+# | arg: -p, --print - Print the result
+#
+#
+#
+# The footprint of the service will be used to defined the maximum footprint we can allow, which is half the maximum RAM.
+# So it will be used to defined 'pm.max_children'
+# A lower value for the footprint will allow more children for 'pm.max_children'. And so for
+#    'pm.start_servers', 'pm.min_spare_servers' and 'pm.max_spare_servers' which are defined from the
+#    value of 'pm.max_children'
+# NOTE: 'pm.max_children' can't exceed 4 times the number of processor's cores.
+#
+# The usage value will defined the way php will handle the children for the pool.
+# A value set as 'low' will set the process manager to 'ondemand'. Children will start only if the
+#   service is used, otherwise no child will stay alive. This config gives the lower footprint when the
+#   service is idle. But will use more proc since it has to start a child as soon it's used.
+# Set as 'medium', the process manager will be at dynamic. If the service is idle, a number of children
+#   equal to pm.min_spare_servers will stay alive. So the service can be quick to answer to any request.
+#   The number of children can grow if needed. The footprint can stay low if the service is idle, but
+#   not null. The impact on the proc is a little bit less than 'ondemand' as there's always a few
+#   children already available.
+# Set as 'high', the process manager will be set at 'static'. There will be always as many children as
+#   'pm.max_children', the footprint is important (but will be set as maximum a quarter of the maximum
+#   RAM) but the impact on the proc is lower. The service will be quick to answer as there's always many
+#   children ready to answer.
+ynh_get_scalable_phpfpm () {
+    local legacy_args=ufp
+    # Declare an array to define the options of this helper.
+    declare -Ar args_array=( [u]=usage= [f]=footprint= [p]=print )
+    local usage
+    local footprint
+    local print
+    # Manage arguments with getopts
+    ynh_handle_getopts_args "$@"
+    # Set all characters as lowercase
+    footprint=${footprint,,}
+    usage=${usage,,}
+    print=${print:-0}
+
+    if [ "$footprint" = "low" ]
+    then
+        footprint=20
+    elif [ "$footprint" = "medium" ]
+    then
+        footprint=35
+    elif [ "$footprint" = "high" ]
+    then
+        footprint=50
+    fi
+
+    # Define the way the process manager handle child processes.
+    if [ "$usage" = "low" ]
+    then
+        php_pm=ondemand
+    elif [ "$usage" = "medium" ]
+    then
+        php_pm=dynamic
+    elif [ "$usage" = "high" ]
+    then
+        php_pm=static
+    else
+        ynh_die --message="Does not recognize '$usage' as an usage value."
+    fi
+
+    # Get the total of RAM available, except swap.
+    local max_ram=$(ynh_check_ram --no_swap)
+
+    less0() {
+        # Do not allow value below 1
+        if [ $1 -le 0 ]
+        then
+            echo 1
+        else
+            echo $1
+        fi
+    }
+
+    # Define pm.max_children
+    # The value of pm.max_children is the total amount of ram divide by 2 and divide again by the footprint of a pool for this app.
+    # So if php-fpm start the maximum of children, it won't exceed half of the ram.
+    php_max_children=$(( $max_ram / 2 / $footprint ))
+    # If process manager is set as static, use half less children.
+    # Used as static, there's always as many children as the value of pm.max_children
+    if [ "$php_pm" = "static" ]
+    then
+        php_max_children=$(( $php_max_children / 2 ))
+    fi
+    php_max_children=$(less0 $php_max_children)
+
+    # To not overload the proc, limit the number of children to 4 times the number of cores.
+    local core_number=$(nproc)
+    local max_proc=$(( $core_number * 4 ))
+    if [ $php_max_children -gt $max_proc ]
+    then
+        php_max_children=$max_proc
+    fi
+
+    if [ "$php_pm" = "dynamic" ]
+    then
+        # Define pm.start_servers, pm.min_spare_servers and pm.max_spare_servers for a dynamic process manager
+        php_min_spare_servers=$(( $php_max_children / 8 ))
+        php_min_spare_servers=$(less0 $php_min_spare_servers)
+
+        php_max_spare_servers=$(( $php_max_children / 2 ))
+        php_max_spare_servers=$(less0 $php_max_spare_servers)
+
+        php_start_servers=$(( $php_min_spare_servers + ( $php_max_spare_servers - $php_min_spare_servers ) /2 ))
+        php_start_servers=$(less0 $php_start_servers)
+    else
+        php_min_spare_servers=0
+        php_max_spare_servers=0
+        php_start_servers=0
+    fi
+
+    if [ $print -eq 1 ]
+    then
+        ynh_debug --message="Footprint=${footprint}Mb by pool."
+        ynh_debug --message="Process manager=$php_pm"
+        ynh_debug --message="Max RAM=${max_ram}Mb"
+        if [ "$php_pm" != "static" ]; then
+            ynh_debug --message="\nMax estimated footprint=$(( $php_max_children * $footprint ))"
+            ynh_debug --message="Min estimated footprint=$(( $php_min_spare_servers * $footprint ))"
+        fi
+        if [ "$php_pm" = "dynamic" ]; then
+            ynh_debug --message="Estimated average footprint=$(( $php_max_spare_servers * $footprint ))"
+        elif [ "$php_pm" = "static" ]; then
+            ynh_debug --message="Estimated footprint=$(( $php_max_children * $footprint ))"
+        fi
+        ynh_debug --message="\nRaw php-fpm values:"
+        ynh_debug --message="pm.max_children = $php_max_children"
+        if [ "$php_pm" = "dynamic" ]; then
+            ynh_debug --message="pm.start_servers = $php_start_servers"
+            ynh_debug --message="pm.min_spare_servers = $php_min_spare_servers"
+            ynh_debug --message="pm.max_spare_servers = $php_max_spare_servers"
+        fi
+    fi
+}
+
+#=================================================
+# FUTURE OFFICIAL HELPERS
+#=================================================
+
+#=================================================
+# YUNOHOST MULTIMEDIA INTEGRATION
+#=================================================
+
+# Install or update the main directory yunohost.multimedia
+#
+# usage: ynh_multimedia_build_main_dir
+ynh_multimedia_build_main_dir () {
+        local ynh_media_release="v1.2"
+        local checksum="806a827ba1902d6911095602a9221181"
+
+        # Download yunohost.multimedia scripts
+        wget -nv https://github.com/YunoHost-Apps/yunohost.multimedia/archive/${ynh_media_release}.tar.gz
+
+        # Check the control sum
+        echo "${checksum} ${ynh_media_release}.tar.gz" | md5sum -c --status \
+                || ynh_die "Corrupt source"
+
+        # Check if the package acl is installed. Or install it.
+        ynh_package_is_installed 'acl' \
+                || ynh_package_install acl
+
+        # Extract
+        mkdir yunohost.multimedia-master
+        tar -xf ${ynh_media_release}.tar.gz -C yunohost.multimedia-master --strip-components 1
+        ./yunohost.multimedia-master/script/ynh_media_build.sh
+}
+
+# Grant write access to multimedia directories to a specified user
+#
+# usage: ynh_multimedia_addaccess user_name
+#
+# | arg: user_name - User to be granted write access
+ynh_multimedia_addaccess () {
+        local user_name=$1
+        groupadd -f multimedia
+        usermod -a -G multimedia $user_name
+}
 
 # Install another version of php.
 #
 # usage: ynh_install_php --phpversion=phpversion [--package=packages]
 # | arg: -v, --phpversion - Version of php to install.
 # | arg: -p, --package - Additionnal php packages to install
+ynh_install_php () {
+  # Declare an array to define the options of this helper.
+  local legacy_args=vp
+  declare -Ar args_array=( [v]=phpversion= [p]=package= )
+  local phpversion
+  local package
+  # Manage arguments with getopts
+  ynh_handle_getopts_args "$@"
+  package=${package:-}
 
+  # Store phpversion into the config of this app
+  ynh_app_setting_set $app phpversion $phpversion
+
+  if [ "$phpversion" == "7.0" ]
+  then
+    ynh_die "Do not use ynh_install_php to install php7.0"
+  fi
+
+  # Store the ID of this app and the version of php requested for it
+  echo "$YNH_APP_INSTANCE_NAME:$phpversion" | tee --append "/etc/php/ynh_app_version"
+
+  # Add an extra repository for those packages
+  ynh_install_extra_repo --repo="https://packages.sury.org/php/ $(lsb_release -sc) main" --key="https://packages.sury.org/php/apt.gpg" --priority=995 --name=extra_php_version
+
+  # Install requested dependencies from this extra repository.
+  # Install php-fpm first, otherwise php will install apache as a dependency.
+  ynh_add_app_dependencies --package="php${phpversion}-fpm"
+  ynh_add_app_dependencies --package="php$phpversion php${phpversion}-common $package"
+
+  # Set php7.0 back as the default version for php-cli.
+  update-alternatives --set php /usr/bin/php7.0
+
+  # Pin this extra repository after packages are installed to prevent sury of doing shit
+  ynh_pin_repo --package="*" --pin="origin \"packages.sury.org\"" --priority=200 --name=extra_php_version
+  ynh_pin_repo --package="php7.0*" --pin="origin \"packages.sury.org\"" --priority=600 --name=extra_php_version --append
+
+  # Advertise service in admin panel
+  yunohost service add php${phpversion}-fpm --log "/var/log/php${phpversion}-fpm.log"
+}
+
+# Remove the specific version of php used by the app.
+#
+# usage: ynh_install_php
+ynh_remove_php () {
+  # Get the version of php used by this app
+  local phpversion=$(ynh_app_setting_get $app phpversion)
+
+  if [ "$phpversion" == "7.0" ] || [ -z "$phpversion" ]
+  then
+    if [ "$phpversion" == "7.0" ]
+    then
+      ynh_print_err "Do not use ynh_remove_php to install php7.0"
+    fi
+    return 0
+  fi
+
+  # Remove the line for this app
+  sed --in-place "/$YNH_APP_INSTANCE_NAME:$phpversion/d" "/etc/php/ynh_app_version"
+
+  # If no other app uses this version of php, remove it.
+  if ! grep --quiet "$phpversion" "/etc/php/ynh_app_version"
+  then
+    # Purge php dependences for this version.
+    ynh_package_autopurge "php$phpversion php${phpversion}-fpm php${phpversion}-common"
+    # Remove the service from the admin panel
+    yunohost service remove php${phpversion}-fpm
+  fi
+
+  # If no other app uses alternate php versions, remove the extra repo for php
+  if [ ! -s "/etc/php/ynh_app_version" ]
+  then
+    ynh_secure_remove /etc/php/ynh_app_version
+  fi
+}
 
 #=================================================
 # FUTURE OFFICIAL HELPERS
@@ -308,4 +991,3 @@ ynh_add_app_dependencies () {
 
   ynh_install_app_dependencies "${current_dependencies}${package}"
 }
-