网站资源批量下载

<?php
    $filename = "aa.js";
    $handle = fopen($filename, "r");
    $contents =  fread($handle, filesize ($filename));
    fclose($handle);
    $arr = json_decode($contents,true);
    echo $n = count($arr);
    foreach ($arr[‘log‘][‘entries‘] as $key => $value) {
    	$b = $arr[‘log‘][‘entries‘][$key];
    	echo $b[‘request‘][‘url‘].‘<br>‘;
    }
?>