php reports errors and records them by itself

<?php
function set_debug($uid = &#39;&#39;, $order = &#39;&#39;, $data = &#39;&#39;){
    $error_path = &#39;order.error.html&#39;;//自定义错误日志保存的文件和路径
    $error_data = array(
        &#39;time&#39; => date("Y-m-d H:i",time()),//记录错误发生的时间
        &#39;error&#39; => urlencode($data),//防止中文乱码
        &#39;order&#39;=> $order,//记录订单
        &#39;user_name&#39;=> $uid,//记录当前用户
    );
    //判断文件大小,选择追加还是重新写入，注意之前防止乱码用了urlencode
    if( abs(filesize($error_path)) < 10240 ){
        @file_put_contents($error_path, urldecode(json_encode($error_data))."<br>",FILE_APPEND);
    }else{
        @file_put_contents($error_path, urldecode(json_encode($error_data)) ."<br>");
    };
}

//模拟订单录入错误时，将日志记录到错误日志中
$uid = 1000070;//模拟用户uid
$order = 2132215641000070;//模拟用户订单号
if (true)  {
    set_debug($uid,$order,&#39;订单录入失败&#39;);
}