wp_mkdir_p( string $target )

基于完整路径的递归目录创建。
Recursive directory creation based on full path.

目录锚点：#说明#参数#源码#笔记

说明（Description）

将尝试设置文件夹的权限。

参数（Parameters）

源码（Source）

/**
 * Recursive directory creation based on full path.
 *
 * Will attempt to set permissions on folders.
 *
 * @since 2.0.1
 *
 * @param string $target Full path to attempt to create.
 * @return bool Whether the path was created. True if path already exists.
 */
function wp_mkdir_p( $target ) {
	$wrapper = null;

	// Strip the protocol.
	if ( wp_is_stream( $target ) ) {
		list( $wrapper, $target ) = explode( '://', $target, 2 );
	}

	// From php.net/mkdir user contributed notes.
	$target = str_replace( '//', '/', $target );

	// Put the wrapper back on the target.
	if ( $wrapper !== null ) {
		$target = $wrapper . '://' . $target;
	}

	/*
	 * Safe mode fails with a trailing slash under certain PHP versions.
	 * Use rtrim() instead of untrailingslashit to avoid formatting.php dependency.
	 */
	$target = rtrim($target, '/');
	if ( empty($target) )
		$target = '/';

	if ( file_exists( $target ) )
		return @is_dir( $target );

	// We need to find the permissions of the parent folder that exists and inherit that.
	$target_parent = dirname( $target );
	while ( '.' != $target_parent && ! is_dir( $target_parent ) ) {
		$target_parent = dirname( $target_parent );
	}

	// Get the permission bits.
	if ( $stat = @stat( $target_parent ) ) {
		$dir_perms = $stat['mode'] & 0007777;
	} else {
		$dir_perms = 0777;
	}

	if ( @mkdir( $target, $dir_perms, true ) ) {

		/*
		 * If a umask is set that modifies $dir_perms, we'll have to re-set
		 * the $dir_perms correctly with chmod()
		 */
		if ( $dir_perms != ( $dir_perms & ~umask() ) ) {
			$folder_parts = explode( '/', substr( $target, strlen( $target_parent ) + 1 ) );
			for ( $i = 1, $c = count( $folder_parts ); $i <= $c;="" $i++="" )="" {="" @chmod(="" $target_parent="" .="" '/'="" .="" implode(="" '/',="" array_slice(="" $folder_parts,="" 0,="" $i="" )="" ),="" $dir_perms="" );="" }="" }="" return="" true;="" }="" return="" false;="" }="">

笔记（Notes）

基本示例