Why isn't JQuery echoing in my PHP code?

Question

When a form titled "functions_question2" is submitted, the following PHP code should dictate what happens

<?php
if (isset($_POST['functions_question2'])) {
    if ($id) {
        $res3 = $db->query("SELECT * FROM answers WHERE user_id=$id");
        $data3 = $res3->fetch_array();
        if (isset($_SESSION['functions_question2']) && $_POST['functions_question2'] == $_SESSION['functions_question2']) {  
          if ($data3['FunctionsPercent'] > 50 && $data3['FunctionsPercent'] < 100) {
            $db->query("UPDATE answers SET FunctionsPercent = 50 WHERE user_id=$id");
            echo'<script type="text/javascript" src="insert.js"></script>'; 
            //***THIS IS THE PART THAT'S GIVING ME TROUBLE.
          }
        }
    }
}
?>

Within the external page insert.js, I have the following code:

<script type='text/javascript'>
$(document).ready(function(){
 $(".incorrectanswermark").fadeIn('slow');
});
</script>

All of the rest of the PHP executes correctly (the MySQL database updates), and there are no console errors. Also, I double-checked to make sure the div that's supposed to show up when the form submits does indeed have the class incorrectanswermark.

Any help would be much appreciated. Thanks!

Your code is likely vulnerable to [**SQL injection**](https://en.wikipedia.org/wiki/SQL_injection) attacks. You should use prepared statements with bound parameters, via either the [**mysqli**](https://secure.php.net/manual/en/mysqli.prepare.php) or [**PDO**](https://secure.php.net/manual/en/pdo.prepared-statements.php) drivers. [**This post**](https://stackoverflow.com/questions/60174/how-can-i-prevent-sql-injection-in-php) has some good examples. — Alex Howansky, Jun 28 '17 at 19:52
Just testing the echo of js and it appears to work fine. Is you condition being meant for that if? — nerdlyist, Jun 28 '17 at 19:53
have you try echo the code without if condition? **if** is working without if condition — Kamarul Anuar, Jun 28 '17 at 19:54
Thanks for your help everyone. I tried removing the script tags and now the console says that $ is undefined. I included a screenshot [link] http://imgur.com/a/QsS8s Do I need to put the external Jquery resources in insert.js? That would add script tags, though... — Snoops, Jun 28 '17 at 20:01

score 1 · Accepted Answer · answered Jun 28 '17 at 20:02

1

Pursuant to the comment from @dan08 above, the script tags in your Javascript file are likely causing the failure.

Change:

<script type='text/javascript'>
$(document).ready(function(){
 $(".incorrectanswermark").fadeIn('slow');
});
</script>

To:

$(document).ready(function(){
 $(".incorrectanswermark").fadeIn('slow');
});

answered Jun 28 '17 at 20:02

Ben Shoval

1,732
1
15
20

Thanks for your response, @BenShoval. I tried removing them but now the console says $ is undefined. I included a screenshot: [link] http://imgur.com/a/QsS8s – Snoops Jun 28 '17 at 20:03
1

@Snoops You need to add somewhere in your HTML before insert.js script is loaded. – Ben Shoval Jun 28 '17 at 20:06
Or better still run the JS just before the `
` tag so it doesn't hold up the rest of the page loading.
– webnoob Jun 28 '17 at 20:07
@Snoops the comment from webnoob is correct. Assuming this is loading in a modern browser of some kind, you should put just above your
tag
– Ben Shoval Jun 28 '17 at 20:09
Perfect! I had – Snoops Jun 28 '17 at 20:10

Why isn't JQuery echoing in my PHP code?

1 Answers1