php 执行shell

请输入代码

<?php

$url=$_POST["url"];
 if(empty($url)) die(0);
$shell = "wget -P /down/ " .$url;
echo "<pre>";
exec($shell, $result, $status);
echo "</pre>";
//注意shell命令的执行结果和执行返回的状态值的对应关系
$shell = "<font color='red'>$shell</font>";
if( $status ){
    echo "failur";
} else {
    echo "success";
}

?>