Need to exit a function if var is empty and make ajax display an error PHP/AJAX

Question

Okay, so I have an AJAX function that sends data to the .php file, which processes it (simple as that):

$(document).on('click','#submit',function () {
    var title = $('#title_submit').val();
    var content = $('#content_submit').val();
    var image = $('#image_url').val();
    $.ajax({
        type: "POST",
        url: "../parts/add.php",
        data: {
            title: title,
            content: content,
            image: image
        },
        success: function (data) {
            redirect(); //a function that redirects to the main page
        }
    });
});

The content passes fine, and the function processes it. So, if there is no image ("image_url" field is empty) it simply ignores it and just adds the title and the content... But if there is an image it checks it's type (switch ($info) { case 'image/jpg':...) if none of them match:

default:
$new_name = "";
break;
}

and here's the hard part (for me):

if ($new_name == "") {
...//stop from executing and say "That ain't no image you be sendin'"; 
} else { //continue with adding an image to the folder and than creating a thumbnail of it...

I tried die() but if I entered something like "11111111111111111111111" into the Image URL input it entered "11111111111111111111111" into the database and outputed it instead of the image.

use if(empty($new_name)) you assign variable instead of checking it — Robert
– Robert, Commented May 6, 2013 at 11:52
now that that's fixed, how do I stop the whole thing from executing and give out an error on the same page (using AJAX)? — Kris Rimar
– Kris Rimar, Commented May 6, 2013 at 11:59

chandresh_cool · Accepted Answer · 2013-05-06 11:50:00Z

1

You are checking wrong way, its like assigning empty string to $name use == operator to check against empty string

if ($new_name == "") {

answered May 6, 2013 at 11:50

chandresh_cool

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3 Comments

Kris Rimar Over a year ago

damn, such a stupid mistake :) but anyway, I corrected, but it still outputs text if I enter an unexisting url or simply text

chandresh_cool Over a year ago

Wait are you trying to upload image using this?

chandresh_cool Over a year ago

It won't work like this with ajax. You need to looks for some third party plugins that support image upload using ajax

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