php_REQUEST调试模式

<?php
//php调试模式
//记录_POST或_GET参数
//经常遇到<form>表单提交数据错误
echo '<pre>';
var_dump(
    $_REQUEST
);
echo '</pre>';
//将得到的参数记录到同路径下request.log
$fp=fopen("request.log",'a');

foreach($_REQUEST as $k => $v){
     fwrite($fp,$k.'=>'.$v."

");
     fwrite($fp,",");
}
fwrite($fp,";");
fclose($fp);
?>