plugin_dir_path ( string $file )

Get the filesystem directory path (with trailing slash) for the plugin __FILE__ passed in.

Return: (string) the filesystem path of the directory that contains the plugin.

Source file: wp-includes/plugin.php

View source



(string) (Required) The filename of the plugin (__FILE__).

More Information

It is a wrapper for trailingslashit( dirname( $file ) );.

The “plugin” part of the name is misleading – it can be used for any file, and will not return the directory of a plugin unless you call it within a file in the plugin’s base directory.

Used by


function plugin_dir_path( $file ) {
	return trailingslashit( dirname( $file ) );


User Contributed Notes

  1. Get the directory of the current file:

    $dir = plugin_dir_path( __FILE__ );
    // Example: /home/user/var/www/wordpress/wp-content/plugins/my-plugin/
  2. Including all PHP files from a plugin sub folder and avoiding adding a unnecessary global just to determine a path that is already available everywhere just using WP core functions.

    foreach ( glob( plugin_dir_path( __FILE__ ) . "subfolder/*.php" ) as $file ) {
        include_once $file;
  3. Define path constant

    For calling numerous files, it is sometimes convenient to define a constant:

    define( 'MY_PLUGIN_PATH', plugin_dir_path( __FILE__ ) );
    include( MY_PLUGIN_PATH . 'includes/admin-page.php');
    include( MY_PLUGIN_PATH . 'includes/classes.php');
    // etc.
  4. Conditional loading

    It is sometimes efficient to conditionally load files, e.g., admin-only (or even by specific admin screen):

    if ( is_admin() ) {
        include_once( plugin_dir_path( __FILE__ ) . 'includes/admin-functions.php' );
    } else {
        include_once( plugin_dir_path( __FILE__ ) . 'includes/front-end-functions.php' );

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