最好的方法是使用wp_mkdir_p函数。此函数将递归地创建具有正确权限的文件夹。

此外，你可以跳过文件夹存在条件，因为函数返回:

当目录已创建或以前存在时，为 如果不能创建目录，则为False。

例子:

$path = 'path/to/directory';
if ( wp_mkdir_p( $path ) ) {
    // Directory exists or was created.
}

更多:https://developer.wordpress.org/reference/functions/wp_mkdir_p/

在WordPress中，还有一个非常方便的函数wp_mkdir_p，它将递归地创建一个目录结构。

参考资料来源:

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.
    $target = rtrim($target, '/'); // Use rtrim() instead of untrailingslashit to avoid formatting.php dependency.
    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; $i <= count( $folder_parts ); $i++ ) {
                @chmod( $target_parent . '/' . implode( '/', array_slice( $folder_parts, 0, $i ) ), $dir_perms );
            }
        }

        return true;
    }

    return false;
}

你还可以试试:

$dirpath = "path/to/dir";
$mode = "0764";
is_dir($dirpath) || mkdir($dirpath, $mode, true);

作为现有解决方案的补充，一个效用函数。

function createDir($path, $mode = 0777, $recursive = true) {
  if(file_exists($path)) return true;
  return mkdir($path, $mode, $recursive);
}

createDir('path/to/directory');

如果已经存在或成功创建，则返回true。否则返回false。

递归创建目录路径:

function makedirs($dirpath, $mode=0777) {
    return is_dir($dirpath) || mkdir($dirpath, $mode, true);
}

灵感来自Python的os.makedirs()

给你。

if (!is_dir('path/to/directory')) {
    if (!mkdir('path/to/directory', 0777, true) && !is_dir('path/to/directory')) {
        throw new \RuntimeException(sprintf('Directory "%s" was not created', 'path/to/directory'));
    }
}