如何在php中模拟点击按钮

<?php  
 session_start();  
  
 require("config.php");  
  
 $db = mysql_connect($dbhost, $dbuser, $dbpassword);  
 mysql_select_db($dbdatabase, $db);  
  
 if($_POST[&#39;submit&#39;]!=""){  
 $username=$_SESSION[username];  
 $city=$_POST[city];  
 $attraction=$_POST[attraction];  
 $imageNum=$_POST[number];  
 $relevance=$_POST[relevance];  
 $sql = "Insert Into vote (username,city,attraction,imageNum,relevance,dateposted) Values(&#39;$username&#39;,&#39;$city&#39;,&#39;$attraction&#39;,&#39;$imageNum&#39;,&#39;$relevance&#39;,NOW())"; 
 $result=mysql_query($sql);  
 echo "";  
 echo "";  
 }  
 ?>

function alertInfor($infor = false, $href = false) {echo <<SCRIPT;}alertInfor("评价成功","next.html");