How to get the id to set a session variable in php
Question
This first part isn't having any issues now.
<?php
session_start();
while($row = $result->fetch_assoc()){
echo "<div id='name' style='margin-top:50px;'><h2>" . $row['name'] . "</h2>";
echo "<a href='nextPage.php'><img class='pic' src='".$row['imageURL']."' data-id='".$row['id']."' height='100px'/></a></div>";
echo "<div id='bio' style='border-bottom:1px solid #000;'><p>" . $row['bio'] . "</p></div>";
}
?>
<script type="text/javascript">
$(document).on('click', '.pic', function(){
var id = $(this).data('id');
$.ajax({
type: 'POST',
url: 'setSession.php',
data: {myId: id}
});
});
</script>
After I click an image I just get php error messages telling me there is an undefined variable. I currently have 'setSession.php' as a separate page, not sure if it's supposed to be or not.
**Next Page**
<?php
session_start();
include("connect.php");
$result = mysqli_query($con, "select * from table");
mysqli_close($con);
?>
<!doctype html>
<html>
<head>
<title></title>
</head>
<body>
<div class="wrapper">
<img src="<?php echo $row['imageURL'];?>" height="200px"/><br/>
<div class="textSection" style="text-align:center;">
<h2><?php echo $row['name'];?></h2>
<p>
<?php echo $row['bio'];?>
</p>
</div>
</div>
</body>
</html>
2 answers
solution1
1 2015-10-19 04:51:13
firstly, you should start session in that page like this.
session_start();
then access the session variable like this.
$_SESSION['your_key_here'];// this will return the value stored in session.
solution2
0 ACCPTED 2015-10-19 05:01:06
Put data attribute data-id on img tag and change ids into class since ids should be unique like so :
<img class='pic' src='" . $row['imageURL'] . "' data-id='" . $row['id'] . "' height='100px'/></a></div>";
And register click handler to img using its class together with AJAX request to set data id into session variable like so :
$(document).on('click', '.pic', function() {
var id = $(this).data('id'); // get id value from data-id attribute
$.ajax({
type : 'POST',
url : 'setSession.php',
data : {
myId : id
},
success : function(msg) { /* do something here for success request */ }
});
});
Finally. in setSession.php page :
<?php
session_start();
$_SESSION['id'] = $_POST['myId']; // this come from ajax request
echo "something"; // and this will available on ajax success callback
?>
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