PHP_常见面试题（1）

<?php
function scan($path){
    static $arr=array();    //静态数组，用于存储扫描到的和文件夹
    $filearr=scandir($path);
    foreach ($filearr as $value){
        if($value==‘.‘ || $value==‘..‘){
            continue;
        }
        if(is_file($path.‘/‘.$value)){
            $arr[]=‘<font color=green>‘.$path.‘/‘.$value.‘</font>‘;
        }
        else {
            $arr[]=‘<font color=red>‘.$path.‘/‘.$value.‘</font>‘;
            scan($path.‘/‘.$value);
        }
        //            if(is_dir($path.‘/‘.$value)){
        //                scan($path.‘/‘.$value);
        //            }
    }
    return $arr;
}
$row=scan(‘../../‘);
$count=count($row);
echo ‘共查到‘.$count.‘个文件！<br/>‘;
foreach ($row as $value)
echo $value.‘<br/>‘;

<?php
function del($path) {
    $res = @opendir ( $path );
    if (! $res) {
        echo ‘文件或文件夹不存在，删除失败！‘;
        exit ();
    }
    while ( $file = readdir ( $res ) ) {
        if ($file != "." && $file != "..") {
            $fullpath = $path . "/" . $file;
            if (! is_dir ( $fullpath )) {
                unlink ( $fullpath );
            } else {
                del ( $fullpath );
            }
        }
    }
    closedir ( $res );
    if (rmdir ( $path )) {
        return true;
    } else {
        return false;
    }
}

$path = "./a/";
if (del ( $path )) {
    echo "删除成功！";
} else {
    echo "删除失败！";
}

?>