jquery ajax检索php获取变量

Question

我想从ajax表单（input.php）中获取$ id变量并使其在主页面上可用，这样我就可以在主页面上使用.submit（）表单使用此变量行动= 'ask.php？q ='。

主页：

<script type='text/javascript'> 
$(document).ready(function(){ 

$('#questionSubmit').click(function(){ 

    $.post("input.php", { question: questionForm.question.value , detail: questionForm.detail.value },); 

}); 

}); 

</script> 
<form method='POST' action='ask.php?q=<?php echo $id ?>' name='questionForm'> 
     <p>Question:</p> 
     <p><input type='text' name='question' id='question'></p> 

     <p><textarea id='detail' name='detail'></textarea></p> 
     <p>Tags:</p> 
     <p><input type='button' value='submit' name='questionSubmit' id='questionSubmit'></p> 
    </form> 

Input.php：

<?php 
include '../connect.php'; 
    if (isset($_POST['questionSubmit'])){ 

    $question=mysql_real_escape_string($_POST['question']); 
    $detail=mysql_real_escape_string($_POST['detail']); 
    $date=date("d M Y"); 
    $time=time(); 
    $user=$_SESSION['id']; 
    $put=mysql_query("INSERT INTO questions VALUES ('','$question','$detail','$date','$time','$user','subject','0')"); 

    $result=mysql_query("SELECT * FROM questions WHERE user='$user' AND time='$time'"); 
     while ($row = mysql_fetch_assoc($result)){ 

      $id=$row['id']; 

      } 

    } 
?> 

Answer 1

 

$.post("input.php", { question: questionForm.question.value , detail: questionForm.detail.value }, 
    function(data) { 
    //add the id to question input, or any other input element you want 
    $("#question").val(data); 
    }); 

//and your input.php, echo the $id 
while ($row = mysql_fetch_assoc($result)){ 

      $id=$row['id']; 

      } 
echo $id;