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

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

如果你想删除像.htaccess这样的“隐藏”文件，你必须使用

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

参见readdir和unlink。

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

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

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

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

 <?
//delete all files from folder  & sub folders
function listFolderFiles($dir)
{
    $ffs = scandir($dir);
    echo '<ol>';
    foreach ($ffs as $ff) {
        if ($ff != '.' && $ff != '..') {
            if (file_exists("$dir/$ff")) {
                unlink("$dir/$ff");
            }
            echo '<li>' . $ff;
            if (is_dir($dir . '/' . $ff)) {
                listFolderFiles($dir . '/' . $ff);
            }
            echo '</li>';
        }
    }
    echo '</ol>';
}
$arr = array(
    "folder1",
    "folder2"
);
for ($x = 0; $x < count($arr); $x++) {
    $mm = $arr[$x];
    listFolderFiles($mm);
}
//end
?>