Cara Mengatasi WordPress Error Call to undefined function trailingslashit()


9 Sep, 2023
6 menit

Trailingslashit merupakan fitur WordPress yang digunakan untuk menghapus slash (/) atau backslash (\) jika mereka sudah ada sebelum sistem wordpress membuat trailingslash. Namun biasanya fitur ini justru menyebabkan WordPress kalian error ketika menginstall plugin tertentu. Lalu bagaimana cara mengatasi wordpress error Call to undefined function trailingslashit()?

Sebenarnya ada dua cara untuk mengatasi error tersebut, dimana cara pertama adalah melakukan update WordPress core ke versi terbaru secara manual (Cara Downgrade Versi WordPress – WP Gan), dan melakukan edit file pada salah satu file WordPress dengan nama file class-wp-textdomain-registry.php yang akan dibahas dalam artikel ini.

Yang Perlu Kalian Miliki

  • Akses web hosing dengan fitur File Manager, atau FTP (jika website kalian sudah online)
  • Tau lokasi folder instalasi WordPress
  • Basic editing file WordPress
  • Koneksi internet

Cara Mengatasi WordPress Error Call to undefined function trailingslashit()

  1. Pertama untuk mengatasi wordpress error Call to undefined function trailingslashit(), kalian login ke web hosting dulu. Biasanya detail login web hosting dikirimkan ke email yang kalian gunakan untuk membeli hosting
    Cara Mengatasi WordPress Error Call to undefined function trailingslashit - 1-1
  2. Cari dan buka halaman File Manager
    Cara Mengatasi WordPress Error Call to undefined function trailingslashit - 1-2
  3. Didalam File Manager, buka folder instalasi WordPress kalian, biasanya berada di folder public_html
    Cara Mengatasi WordPress Error Call to undefined function trailingslashit - 1-3
  4. Selanjutnya ketika masih berada di folder instalasi WordPress, bukan folder wp-includes
    Cara Mengatasi WordPress Error Call to undefined function trailingslashit - 1-4
  5. Setelah masuk ke folder wp-includes, cari dan rename class-wp-textdomain-registry.php menjadi class-wpgan-textdomain-registry.php atau apapun
    Cara Mengatasi WordPress Error Call to undefined function trailingslashit - 1-5
  6. Masih di folder yang sama, pilih menu untuk menambahkan file, dan beri nama file baru tersebut dengan nama class-wp-textdomain-registry.php
    Cara Mengatasi WordPress Error Call to undefined function trailingslashit - 1-6
  7. Edit file baru class-wp-textdomain-registry.php kalian, kemudian tambahkan kode dibawah ini, atau salin kode dari sini: https://github.com/WordPress/WordPress/blob/6.1-branch/wp-includes/class-wp-textdomain-registry.php dan simpan file untuk memperbaiki error wordpress error Call to undefined function trailingslashit().
    Cara Mengatasi WordPress Error Call to undefined function trailingslashit - 1-7
<?php
/**
 * Locale API: WP_Textdomain_Registry class.
 *
 * This file uses rtrim() instead of untrailingslashit() and trailingslashit()
 * to avoid formatting.php dependency.
 *
 * @package WordPress
 * @subpackage i18n
 * @since 6.1.0
 */

/**
 * Core class used for registering text domains.
 *
 * @since 6.1.0
 */
#[AllowDynamicProperties]
class WP_Textdomain_Registry {
	/**
	 * List of domains and all their language directory paths for each locale.
	 *
	 * @since 6.1.0
	 *
	 * @var array
	 */
	protected $all = array();

	/**
	 * List of domains and their language directory path for the current (most recent) locale.
	 *
	 * @since 6.1.0
	 *
	 * @var array
	 */
	protected $current = array();

	/**
	 * List of domains and their custom language directory paths.
	 *
	 * @see load_plugin_textdomain()
	 * @see load_theme_textdomain()
	 *
	 * @since 6.1.0
	 *
	 * @var array
	 */
	protected $custom_paths = array();

	/**
	 * Holds a cached list of available .mo files to improve performance.
	 *
	 * @since 6.1.0
	 *
	 * @var array
	 */
	protected $cached_mo_files = array();

	/**
	 * Holds a cached list of domains with translations to improve performance.
	 *
	 * @since 6.2.0
	 *
	 * @var string[]
	 */
	protected $domains_with_translations = array();

	/**
	 * Returns the languages directory path for a specific domain and locale.
	 *
	 * @since 6.1.0
	 *
	 * @param string $domain Text domain.
	 * @param string $locale Locale.
	 *
	 * @return string|false MO file path or false if there is none available.
	 */
	public function get( $domain, $locale ) {
		if ( isset( $this->all[ $domain ][ $locale ] ) ) {
			return $this->all[ $domain ][ $locale ];
		}

		return $this->get_path_from_lang_dir( $domain, $locale );
	}

	/**
	 * Determines whether any MO file paths are available for the domain.
	 *
	 * This is the case if a path has been set for the current locale,
	 * or if there is no information stored yet, in which case
	 * {@see _load_textdomain_just_in_time()} will fetch the information first.
	 *
	 * @since 6.1.0
	 *
	 * @param string $domain Text domain.
	 * @return bool Whether any MO file paths are available for the domain.
	 */
	public function has( $domain ) {
		return (
			! empty( $this->current[ $domain ] ) ||
			empty( $this->all[ $domain ] ) ||
			in_array( $domain, $this->domains_with_translations, true )
		);
	}

	/**
	 * Sets the language directory path for a specific domain and locale.
	 *
	 * Also sets the 'current' property for direct access
	 * to the path for the current (most recent) locale.
	 *
	 * @since 6.1.0
	 *
	 * @param string       $domain Text domain.
	 * @param string       $locale Locale.
	 * @param string|false $path   Language directory path or false if there is none available.
	 */
	public function set( $domain, $locale, $path ) {
		$this->all[ $domain ][ $locale ] = $path ? rtrim( $path, '/' ) . '/' : false;
		$this->current[ $domain ]        = $this->all[ $domain ][ $locale ];
	}

	/**
	 * Sets the custom path to the plugin's/theme's languages directory.
	 *
	 * Used by {@see load_plugin_textdomain()} and {@see load_theme_textdomain()}.
	 *
	 * @since 6.1.0
	 *
	 * @param string $domain Text domain.
	 * @param string $path   Language directory path.
	 */
	public function set_custom_path( $domain, $path ) {
		$this->custom_paths[ $domain ] = rtrim( $path, '/' );
	}

	/**
	 * Returns possible language directory paths for a given text domain.
	 *
	 * @since 6.2.0
	 *
	 * @param string $domain Text domain.
	 * @return string[] Array of language directory paths.
	 */
	private function get_paths_for_domain( $domain ) {
		$locations = array(
			WP_LANG_DIR . '/plugins',
			WP_LANG_DIR . '/themes',
		);

		if ( isset( $this->custom_paths[ $domain ] ) ) {
			$locations[] = $this->custom_paths[ $domain ];
		}

		return $locations;
	}

	/**
	 * Gets the path to the language directory for the current locale.
	 *
	 * Checks the plugins and themes language directories as well as any
	 * custom directory set via {@see load_plugin_textdomain()} or {@see load_theme_textdomain()}.
	 *
	 * @since 6.1.0
	 *
	 * @see _get_path_to_translation_from_lang_dir()
	 *
	 * @param string $domain Text domain.
	 * @param string $locale Locale.
	 * @return string|false Language directory path or false if there is none available.
	 */
	private function get_path_from_lang_dir( $domain, $locale ) {
		$locations = $this->get_paths_for_domain( $domain );

		$found_location = false;

		foreach ( $locations as $location ) {
			if ( ! isset( $this->cached_mo_files[ $location ] ) ) {
				$this->set_cached_mo_files( $location );
			}

			$path = "$location/$domain-$locale.mo";

			foreach ( $this->cached_mo_files[ $location ] as $mo_path ) {
				if (
					! in_array( $domain, $this->domains_with_translations, true ) &&
					str_starts_with( str_replace( "$location/", '', $mo_path ), "$domain-" )
				) {
					$this->domains_with_translations[] = $domain;
				}

				if ( $mo_path === $path ) {
					$found_location = rtrim( $location, '/' ) . '/';
				}
			}
		}

		if ( $found_location ) {
			$this->set( $domain, $locale, $found_location );

			return $found_location;
		}

		// If no path is found for the given locale and a custom path has been set
		// using load_plugin_textdomain/load_theme_textdomain, use that one.
		if ( 'en_US' !== $locale && isset( $this->custom_paths[ $domain ] ) ) {
			$fallback_location = rtrim( $this->custom_paths[ $domain ], '/' ) . '/';
			$this->set( $domain, $locale, $fallback_location );
			return $fallback_location;
		}

		$this->set( $domain, $locale, false );

		return false;
	}

	/**
	 * Reads and caches all available MO files from a given directory.
	 *
	 * @since 6.1.0
	 *
	 * @param string $path Language directory path.
	 */
	private function set_cached_mo_files( $path ) {
		$this->cached_mo_files[ $path ] = array();

		$mo_files = glob( $path . '/*.mo' );

		if ( $mo_files ) {
			$this->cached_mo_files[ $path ] = $mo_files;
		}
	}
}
Cara Mengatasi WordPress Error Call to undefined function trailingslashit - 1-8

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