get_filesystem_method( array $args = array(), string $context = '', bool $allow_relaxed_file_ownership = false ): string  Determines which method to use for reading, writing, modifying, or deleting files on the filesystem.   Description The priority of the transports are: Direct, SSH2, FTP PHP Extension, FTP Sockets (Via Sockets class, or fsockopen()). Valid values for these are: ‘direct’, ‘ssh2’, ‘ftpext’ or ‘ftpsockets’. The return value can be overridden by defining the FS_METHOD constant in wp-config.php, or filtering via ‘filesystem_method’.   Parameters   $args array Optional     Connection details.   Default: array()   $context string Optional     Full path to the directory that is tested for being writable.   Default: ''   $allow_relaxed_file_ownership bool Optional     Whether to allow Group/World writable.   Default: false     Return string The transport to use, see description for valid return values.   Source  File: wp-admin/includes/file.php. View all references  function get_filesystem_method( $args = array(), $context = '', $allow_relaxed_file_ownership = false ) {
	// Please ensure that this is either 'direct', 'ssh2', 'ftpext', or 'ftpsockets'.
	$method = defined( 'FS_METHOD' ) ? FS_METHOD : false;

	if ( ! $context ) {
		$context = WP_CONTENT_DIR;
	}

	// If the directory doesn't exist (wp-content/languages) then use the parent directory as we'll create it.
	if ( WP_LANG_DIR === $context && ! is_dir( $context ) ) {
		$context = dirname( $context );
	}

	$context = trailingslashit( $context );

	if ( ! $method ) {

		$temp_file_name = $context . 'temp-write-test-' . str_replace( '.', '-', uniqid( '', true ) );
		$temp_handle    = @fopen( $temp_file_name, 'w' );
		if ( $temp_handle ) {

			// Attempt to determine the file owner of the WordPress files, and that of newly created files.
			$wp_file_owner   = false;
			$temp_file_owner = false;
			if ( function_exists( 'fileowner' ) ) {
				$wp_file_owner   = @fileowner( __FILE__ );
				$temp_file_owner = @fileowner( $temp_file_name );
			}

			if ( false !== $wp_file_owner && $wp_file_owner === $temp_file_owner ) {
				/*
				 * WordPress is creating files as the same owner as the WordPress files,
				 * this means it's safe to modify & create new files via PHP.
				 */
				$method                                  = 'direct';
				$GLOBALS['_wp_filesystem_direct_method'] = 'file_owner';
			} elseif ( $allow_relaxed_file_ownership ) {
				/*
				 * The $context directory is writable, and $allow_relaxed_file_ownership is set,
				 * this means we can modify files safely in this directory.
				 * This mode doesn't create new files, only alter existing ones.
				 */
				$method                                  = 'direct';
				$GLOBALS['_wp_filesystem_direct_method'] = 'relaxed_ownership';
			}

			fclose( $temp_handle );
			@unlink( $temp_file_name );
		}
	}

	if ( ! $method && isset( $args['connection_type'] ) && 'ssh' === $args['connection_type'] && extension_loaded( 'ssh2' ) ) {
		$method = 'ssh2';
	}
	if ( ! $method && extension_loaded( 'ftp' ) ) {
		$method = 'ftpext';
	}
	if ( ! $method && ( extension_loaded( 'sockets' ) || function_exists( 'fsockopen' ) ) ) {
		$method = 'ftpsockets'; // Sockets: Socket extension; PHP Mode: FSockopen / fwrite / fread.
	}

	/**
	 * Filters the filesystem method to use.
	 *
	 * @since 2.6.0
	 *
	 * @param string $method                       Filesystem method to return.
	 * @param array  $args                         An array of connection details for the method.
	 * @param string $context                      Full path to the directory that is tested for being writable.
	 * @param bool   $allow_relaxed_file_ownership Whether to allow Group/World writable.
	 */
	return apply_filters( 'filesystem_method', $method, $args, $context, $allow_relaxed_file_ownership );
}
   Hooks     apply_filters( 'filesystem_method', string $method, array $args, string $context, bool $allow_relaxed_file_ownership )   
Filters the filesystem method to use.      Related  Uses    Uses Description      trailingslashit() wp-includes/formatting.php   Appends a trailing slash.     apply_filters() wp-includes/plugin.php   Calls the callback functions that have been added to a filter hook.   
   Used By    Used By Description      WP_REST_Plugins_Controller8b7c:f320:99b9:690f:4595:cd17:293a:c069is_filesystem_available() wp-includes/rest-api/endpoints/class-wp-rest-plugins-controller.php   Determine if the endpoints are available.     WP_Customize_Manager8b7c:f320:99b9:690f:4595:cd17:293a:c069ustomize_pane_settings() wp-includes/class-wp-customize-manager.php   Prints JavaScript settings for parent window.     wp_print_request_filesystem_credentials_modal() wp-admin/includes/file.php   Prints the filesystem credentials modal when needed.     request_filesystem_credentials() wp-admin/includes/file.php   Displays a form to the user to request for their FTP/SSH details in order to connect to the filesystem.     WP_Filesystem() wp-admin/includes/file.php   Initializes and connects the WordPress Filesystem Abstraction classes.   
    Changelog    Version Description     2.5.0 Introduced.    

    
{'path': 'public/docs/wordpress/functions/get_filesystem_method.html', 'source': 'DevDocs.IO'}