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footnotes/class/language.php
2021-03-01 11:09:29 +00:00

108 lines
3.8 KiB
PHP

<?php
/**
* Loads text domain of current or default language for localization.
*
* @filesource
* @author Stefan Herndler
* @since 1.5.0 14.09.14 17:47
*
*
* @lastmodified 2021-02-18T2028+0100
*
* @since 2.0.0 Bugfix: Localization: correct function call apply_filters() with all required arguments after PHP 7.1 promoted warning to error, thanks to @matkus2 bug report and code contribution.
* @since 2.1.6 Bugfix: Localization: conform to WordPress plugin language file name scheme, thanks to @nikelaos bug report.
*/
/**
* Loads text domain of current or default language for localization.
*
* @author Stefan Herndler
* @since 1.5.0
*/
class MCI_Footnotes_Language {
/**
* Register WordPress Hook.
*
* @author Stefan Herndler
* @since 1.5.0
*/
public static function registerHooks() {
add_action('plugins_loaded', array("MCI_Footnotes_Language", "loadTextDomain"));
}
/**
* Loads the text domain for current WordPress language if exists.
* Otherwise fallback "en_GB" will be loaded.
*
* @author Stefan Herndler
* @since 1.5.0
*
*
* - Bugfix: Correct function call apply_filters() with all required arguments after PHP 7.1 promoted warning to error, thanks to @matkus2 bug report and code contribution.
*
* @since 2.0.0
* @date 2020-10-26T1609+0100
*
* @contributor @matkus2
* @link https://wordpress.org/support/topic/error-missing-parameter-if-using-php-7-1-or-later/
*
* Add 3rd (empty) argument in apply_filters() to prevent PHP from throwing an error:
* “Fatal error: Uncaught ArgumentCountError: Too few arguments to function apply_filters()”
*
* Yet get_locale() is defined w/o parameters in wp-includes/l10n.php:30, and
* apply_filters() is defined as apply_filters( $tag, $value ) in wp-includes/plugin.php:181.
* @link https://developer.wordpress.org/reference/functions/apply_filters/
*
* But apply_filters() is defined with a 3rd parameter (and w/o the first one) in
* wp-includes/class-wp-hook.php:264, as public function apply_filters( $value, $args ).
*
* Taking it all together, probably the full function definition would be:
* public function apply_filters( $tag, $value, $args ).
* In the case of get_locale(), $args is empty.
*
* The bug was lurking in WP. PHP 7.1 promoted the warning to an error.
* @link https://www.php.net/manual/en/migration71.incompatible.php
* @link https://www.php.net/manual/en/migration71.incompatible.php#migration71.incompatible.too-few-arguments-exception
*/
public static function loadTextDomain() {
// if language file with localization exists:
if ( self::load( apply_filters( 'plugin_locale', get_locale(), '' ) ) ) {
return;
}
// else fall back to British English:
self::load( "en_GB" );
}
/**
* Loads a specific text domain.
*
* @author Stefan Herndler
* @since 1.5.1
* @param string $p_str_LanguageCode Language Code to load a specific text domain.
* @return bool
*
*
* - Bugfix: Localization: conform to WordPress plugin language file name scheme, thanks to @nikelaos bug report.
*
* @since 2.1.6
* @date 2020-12-08T1931+0100
*
* @reporter @nikelaos
* @link https://wordpress.org/support/topic/more-feature-ideas/
*
* That is done by using load_plugin_textdomain():
* “The .mo file should be named based on the text domain with a dash, and then the locale exactly.”
* @see wp-includes/l10n.php:857
*/
private static function load($p_str_LanguageCode) {
return load_plugin_textdomain(
MCI_Footnotes_Config::C_STR_PLUGIN_NAME,
// This argument only fills the gap left by a deprecated argument (since WP2.7):
false,
// The plugin basedir is provided; trailing slash would be clipped:
MCI_Footnotes_Config::C_STR_PLUGIN_NAME . '/languages'
);
}
}