Using AJAX to call a PHP script

Question

I am using AJAX to call a PHP script. I am using conditions to echo the proper error message in my PHP. When I do this, my AJAX and JQUERY do not work properly.

My JQUERY/AJAX:

        if (email != 0) {
            // Run AJAX email validation and check to see if the email is already taken
            $.ajax({  
                type: "POST",  
                url: "checkemail.php",  
                data: dataString,
                async: false,
                success: function(data) {
                    var error= false;

                    if (data == 'invalid') {
                        var invalid= 1;
                    }
                    else if (data == 'taken') {
                        var taken= 1;
                    }
                    if (invalid == 1) {
                        alert('invalid email');
                        e.preventDefault();
                    }
                    if (taken == 1) {
                        alert('email taken');
                        e.preventDefault();
                    }
                }
            });
        }

My PHP:

<?php

$email = true

if ($email == true) {

    echo "taken";

}


?>

But, when I just put:

echo "taken";

The AJAX and JQUERY works exactly how it should and the respective error message pops up. "taken" is being echo'd either way, so I don't get what is going on. What could I be doing wrong?

You should test your PHP code before making ajax request to them. — idmean
– idmean, Commented Jan 16, 2014 at 15:35
As of jQuery 1.8, the use of async:false in jQuery.ajax() is deprecated. — Merlin
– Merlin, Commented Jan 16, 2014 at 15:39

Ryan · Accepted Answer · 2014-01-16 15:34:18Z

3

You're missing your semicolon.

$email = true

needs to be

$email = true;

In your response, you will probably be getting a PHP error - unless your error messages are suppressed.

answered Jan 16, 2014 at 15:34

Ryan

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