wp-includes/l10n.php:1143Loads the script translated strings.
$handlestring$domainstringoptional'default'$pathstringoptional''string|falseOne hook fires while load_script_textdomain() runs, in this order:
Filters the relative path of scripts used for finding translation files.
function load_script_textdomain( $handle, $domain = 'default', $path = '' ) { $wp_scripts = wp_scripts(); if ( ! isset( $wp_scripts->registered[ $handle ] ) ) { return false; } $path = untrailingslashit( $path ); $locale = determine_locale(); // If a path was given and the handle file exists simply return it. $file_base = 'default' === $domain ? $locale : $domain . '-' . $locale; $handle_filename = $file_base . '-' . $handle . '.json'; if ( $path ) { $translations = load_script_translations( $path . '/' . $handle_filename, $handle, $domain ); if ( $translations ) { return $translations; } } $src = $wp_scripts->registered[ $handle ]->src; if ( ! preg_match( '|^(https?:)?//|', $src ) && ! ( $wp_scripts->content_url && str_starts_with( $src, $wp_scripts->content_url ) ) ) { $src = $wp_scripts->base_url . $src; } $relative = false; $languages_path = WP_LANG_DIR; $src_url = wp_parse_url( $src ); $content_url = wp_parse_url( content_url() ); $plugins_url = wp_parse_url( plugins_url() ); $site_url = wp_parse_url( site_url() ); $theme_root = get_theme_root(); // If the host is the same or it's a relative URL. if ( ( ! isset( $content_url['path'] ) || str_starts_with( $src_url['path'], $content_url['path'] ) ) && ( ! isset( $src_url['host'] ) || ! isset( $content_url['host'] ) || $src_url['host'] === $content_url['host'] ) ) { // Make the src relative the specific plugin or theme. if ( isset( $content_url['path'] ) ) { $relative = substr( $src_url['path'], strlen( $content_url['path'] ) ); } else { $relative = $src_url['path']; } $relative = trim( $relative, '/' ); $relative = explode( '/', $relative ); /* * Ensure correct languages path when using a custom `WP_PLUGIN_DIR` / `WP_PLUGIN_URL` configuration, * a custom theme root, and/or using Multisite with subdirectories. * See https://core.trac.wordpress.org/ticket/60891 and https://core.trac.wordpress.org/ticket/62016. */ $theme_dir = array_slice( explode( '/', $theme_root ), -1 ); $dirname = $theme_dir[0] === $relative[0] ? 'themes' : 'plugins'; $languages_path = WP_LANG_DIR . '/' . $dirname; $relative = array_slice( $relative, 2 ); // Remove plugins/<plugin name> or themes/<theme name>. $relative = implode( '/', $relative ); } elseif ( ( ! isset( $plugins_url['path'] ) || str_starts_with( $src_url['path'], $plugins_url['path'] ) ) && ( ! isset( $src_url['host'] ) || ! isset( $plugins_url['host'] ) || $src_url['host'] === $plugins_url['host'] ) ) { // Make the src relative the specific plugin. if ( isset( $plugins_url['path'] ) ) { $relative = substr( $src_url['path'], strlen( $plugins_url['path'] ) ); } else { $relative = $src_url['path']; } $relative = trim( $relative, '/' ); $relative = explode( '/', $relative ); $languages_path = WP_LANG_DIR . '/plugins'; $relative = array_slice( $relative, 1 ); // Remove <plugin name>.Introduced in 5.0.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/l10n.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.