在第二个GET请求之后，第一页中的PHP会话变量的值未更新为第二页中的会话变量的值

Question

I am using session variables in PHP. 我在PHP中使用会话变量。 I am making an ajax request from modifyDetails.php to another php file named getDetails.php using : 我正在使用以下命令从ModifyDetails.php向另一个名为getDetails.php的 php文件发出ajax请求：

xmlhttp.open("GET", "getDetails.php?val=" + str, true); xmlhttp.open（“ GET”，“ getDetails.php？val =” + str，true）;

I am trying to change the values of form fields based on the selection made in dropdown list. 我正在尝试根据下拉列表中的选择更改表单字段的值。 I am getting it correct when I make a selection for the first time but when i make a different selection now , the values are still the same. 当我第一次进行选择时，我得到的是正确的，但是当我现在进行其他选择时，值仍然相同。 I have checked the values of session variable $_SESSION['Member_details'] in getDetails.php and it's values are perfectly fine but the session variable in modifyDetails.php is not updating it's value. 我已经检查了getDetails.php会话变量$ _SESSION [“Member_details”]的值，它的值是完全正常的，但在modifyDetails.php会话变量没有更新它的价值。

"modifyDetails.php" “ modifyDetails.php”

<?php 
   session_start();
   $fid = $_SESSION['fid_value'];  
   $get_Member_details = $_SESSION['Member_details'];
?>  

<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Modify Details</title>
<script src="/prj/jquery.min.js"></script>

<script>
function fillData(str)
{  
   $(document).ready(function() 
   {
      if (window.XMLHttpRequest){
            xmlhttp=new XMLHttpRequest();
       }
      else{
            xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
      }
      xmlhttp.onreadystatechange = function() {
    if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
      document.getElementById("kk").innerHTML = xmlhttp.responseText;
    }
  };
      xmlhttp.open("GET", "getDetails.php?val=" + str, true);
      xmlhttp.send();

      //window.alert(str); 
      var jage= "<?php echo $get_Member_details['age'];?> ";
      var jsex= "<?php echo $get_Member_details['sex'];?> ";
      var jdob= "<?php echo $get_Member_details['dob'];?> ";
      //alert(jdob);
      var jrelation = "<?php echo $get_Member_details['Relationship'];?> ";
      var jcontact = "<?php echo $get_Member_details['contact'];?> ";
      var jaddress = "<?php echo $get_Member_details['address'];?> ";
      var jpin = "<?php echo $get_Member_details['pin'];?> ";

      document.getElementById("Age").value = jage;
      //document.getElementById("Sex").value = jsex;
      document.getElementById("Dob").value = jdob;
      document.getElementById("Rel").value = jrelation;
      document.getElementById("Contact").value = jcontact;
      document.getElementById("Address").value = jaddress;
      document.getElementById("Pin").value = jpin;
   });
}
</script>
<style>
   body{
   background-color:lightgrey;
}
#button {
    background-color: green;
    border: none;
    color: white;
    padding: 8px 14px;
    text-align: center;
    text-decoration: none;
    font-size: 17px;
    margin: 2px 4px;
    cursor: pointer;
}
table { padding:2px 6px;}
</style>
</head>
<body>
    <h1>Customer Form </h1>
    <h3>Please fill in the details below:</h3>
      <form action="modified.php" method="post">
         <table style="width:24%;">
            <tr><td>Family ID:</td><td><input type="text" name="fid" value="<?php echo "$fid";?>" readonly /></td></tr><tr></tr>
            <tr><td>Name:</td>
            <td>
              <?php
                 mysql_connect('localhost', 'root', '');
                 mysql_select_db('project');

                 $sql_query = "SELECT name FROM family WHERE fid=$fid";
                 $records = mysql_query($sql_query);

                 echo"<select name='member_name' onchange='fillData(this.value)'>";         
                 while( $family_member = mysql_fetch_array($records) ) 
                 {
                    echo "<option value='".$family_member['name']."' >".$family_member['name']."</option>";                        
                 }
                 echo "</select></td></tr>"; 

              ?> 
        <div id="kk">
        </div>
            <tr><td>Age:</td><td><input id="Age" type="text" name="age" required /></td></tr><tr></tr>
            <tr><td>Sex:</td><td><input id="Sex" type="radio" name="sex" value="Male" required />Male 
                                 <input id="Sex" type="radio" name="sex" value="Female" required/>Female</td></tr><tr></tr>
            <tr><td>Date of Birth:</td><td><input id="Dob" type="text" name="dob" required /></td></tr><tr></tr>
            <tr><td>Relationship:</td><td><input id="Rel" type="text" name="relation" list="relations" required>
                         <datalist id="relations">
                                <option value="Son">Son</option>
                                <option value="Daughter">Daughter</option>
                                <option value="Father">Father</option>
                                <option value="Mother">Mother</option>
                                <option value="GrandMother">GrandMother</option>
                                <option value="GrandFather">GrandFather</option></td></tr><tr></tr>
                         </datalist></td></tr>  
            <tr><td>Contact Number:</td><td><input id="Contact" type="text" name="contact" required /></td></tr><tr></tr>
            <tr><td>Address:</td><td><input id="Address" type="text" name="address" required /></td></tr><tr></tr>
            <tr><td>Pincode:</td><td><input id="Pin" type="text" name="pin" required /></td></tr><tr></tr> 
         </table>  <br> 

        <input id="button" type="submit" value="Submit"/>
      </form>

      <br><br><br>
      <a href="search.html"> <h4>Back to Search Page</h4></a>

</body>

"getDetails.php" “ getDetails.php”

<?php 
   session_start();
   $fid =$_SESSION['fid_value']; 
?>  

<?php
 $name=$_GET['val'];
 echo $name;
 mysql_connect('localhost', 'root', '');
 mysql_select_db('project');

 $sql_query = "SELECT * FROM family WHERE fid=$fid AND name='$name'";
 $records = mysql_query($sql_query);

 $_SESSION['Member_details'] = mysql_fetch_array($records);

 $hold = $_SESSION['Member_details'];

 //echo $hold['dob'];
 //echo $hold['contact'];

?>

Answer 1

Ajax call happens after page load, you JS is getting rendered when the session is in State 'A'. Ajax调用在页面加载后发生，当会话处于状态“ A”时，将渲染您的JS。

Once you make your Ajax call, it`s in sate 'B', but at that point call to Session has already been made and the initial view is already rendered. 进行Ajax调用后，它的状态为“ B”，但此时已经对Session进行了调用，并且初始视图已呈现。

So, to fix the situation you should pass variables that are changing through Ajax reposne with JSON for example. 因此，要解决这种情况，您应该传递通过JSON通过Ajax reposne更改的变量。

在第二个GET请求之后，第一页中的PHP会话变量的值未更新为第二页中的会话变量的值

问题描述

1 个解决方案

解决方案1
1 2016-03-03 14:50:44

在第二个GET请求之后，第一页中的PHP会话变量的值未更新为第二页中的会话变量的值

问题描述

1 个解决方案

解决方案1 1 2016-03-03 14:50:44

解决方案1
1 2016-03-03 14:50:44