How do you type php variables in js code?

Question

So, I want to show a js alert to the user if they exist in a table called paymentindue. The table has a custom message column. I want the alert to show the custom message. I am using PHP to handle sql queries

    <?php 
include 'dbconn.php';
$name = $_SESSION['name'];
$email = $_SESSION['email'];

$sql = "SELECT * FROM users where email='$email' AND username = '$name'";
        $result = mysqli_query($conn, $sql);
        if (mysqli_num_rows($result) > 0){
            echo '<script>alert("<?php Custom message goes here?>")</script>';
        }
?>

But the problem is that I get the alert instead of the custom message

Can refer to the suggestions here: stackoverflow.com/questions/3057317/… — Chun Lin
– Chun Lin, Commented May 2, 2020 at 5:15
Try this <script type="text/javascript"> let message; message = "'.$phpvariable'" alert(message); </script>'; — Mohamed Mamun
– Mohamed Mamun, Commented May 2, 2020 at 5:18

anatolhiman · Accepted Answer · 2020-05-02 05:27:03Z

0

You need to split your echo into two strings and a php variable to make this work.

$your_custom_message = 'Your message here'
echo '<script>alert("' . $your_custom_message . '")</script>'`

edited May 2, 2020 at 5:27

answered May 2, 2020 at 5:19

anatolhiman

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1 Comment

mankowitz Over a year ago

That won't work. You are sending raw php to the user.

mankowitz · Accepted Answer · 2020-05-02 05:20:19Z

0

It looks like you are trying to send php code to the user, which doesn't work. Instead, just compose the message in your script if needed.

$message = "something you compose here";
echo '<script>alert("'. $message .'")</script>';

answered May 2, 2020 at 5:20

mankowitz

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