$files = glob('path/to/temp/*'); // get all file names
foreach($files as $file){ // iterate files
  if(is_file($file))
    unlink($file); // delete file
}

$files = glob('path/to/temp/{,.}*', GLOB_BRACE);

foreach (new DirectoryIterator('/path/to/directory') as $fileInfo)
    if(!$fileInfo->isDot())
        unlink($fileInfo->getFilename();

<?php

if ($handle = opendir('/path/to/files'))
{
    echo "Directory handle: $handlen";
    echo "Files:n";

    while (false !== ($file = readdir($handle)))
    {
        if( is_file($file) )
        {
            unlink($file);
        }
    }

    closedir($handle);
}
?>

$dir = 'your/directory/';
foreach(glob($dir.'*.*') as $v){
    unlink($v);
}

/**
     * Delete a file or recursively delete a directory
     *
     * @param string $str Path to file or directory
     */
    function recursiveDelete($str){
        if(is_file($str)){
            return @unlink($str);
        }
        elseif(is_dir($str)){
            $scan = glob(rtrim($str,'/').'/*');
            foreach($scan as $index=>$path){
                recursiveDelete($path);
            }
            return @rmdir($str);
        }
    }