需要在文件夹中找到的所有块（而不是全部写出来）

I'm creating custom elements for Visual Composer WP Plugin. In functions.php, I'm referencing each block so that it loads in the admin side:

function vc_before_init_actions() {
    require_once('vc_elements/hero/hero.php');  
    require_once('vc_elements/text-image/text-image.php' );  
}

However, if I have twenty custom elements, I'll have to reference them all individually. Is there a way to just load all blocks that are in the vc_elements folder?

I know a potential stumbling block would be the fact that each of my custom elements are in different folders (i.e. hero.php is in vc_elements > hero > hero.php). Is it possible with my current folder structure?

You can try this code: it will require the file only if that file is in a subfolder of the path you provided to the function requireBlockFiles and the file is a PHP file and the folder name matches the file name (cf file hero.php in subfolder hero)

function requireBlockFiles($dir){
    $rii = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($dir));

    foreach ($rii as $file) {
        if ($file->isDir()){
            continue;
        }

        if(strtolower($file->getExtension()) === 'php' && $file->getPathInfo()->getFilename() . '.' . $file->getExtension() === $file->getFilename()){
            require_once($file->getPathname());
        }
    }
}

function vc_before_init_actions() {
    requireBlockFiles('vc_elements');
}

NOTE: this will be case sensitive for the match between folder name and file name.