February 12, 2011 
Definition:
function load_plugin_textdomain( $domain, $abs_rel_path = false, $plugin_rel_path = false ) {}
Loads the plugin’s translated strings.
If the path is not given then it will be the root of the plugin directory. The .mo file should be named based on the domain with a dash, and then the locale exactly.
Parameters
- string $domain: Unique identifier for retrieving translated strings
- string $abs_rel_path: Optional. Relative path to ABSPATH of a folder, where the .mo file resides. Deprecated, but still functional until 2.7
- string $plugin_rel_path: Optional. Relative path to WP_PLUGIN_DIR. This is the preferred argument to use. It takes precedence over $abs_rel_path
Defined filters
- plugin_locale
apply_filters( 'plugin_locale', get_locale()
Source code
function load_plugin_textdomain( $domain, $abs_rel_path = false, $plugin_rel_path = false ) {
$locale = apply_filters( 'plugin_locale', get_locale(), $domain );
if ( false !== $plugin_rel_path ) {
$path = WP_PLUGIN_DIR . '/' . trim( $plugin_rel_path, '/' );
} else if ( false !== $abs_rel_path ) {
_deprecated_argument( __FUNCTION__, '2.7' );
$path = ABSPATH . trim( $abs_rel_path, '/' );
} else {
$path = WP_PLUGIN_DIR;
}
$mofile = $path . '/'. $domain . '-' . $locale . '.mo';
return load_textdomain( $domain, $mofile );
}
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