PHP if image exceeds 1000px using getimagesize() - php

Question

I'm using the remote method used in jQuery Validation.
I'm referring to a PHP file shown below:
<?php
$title = mysql_real_escape_string($right_form_url);
$size = getimagesize($title);
$size[3] = $width;
if ($width > 1000) {
$output = false;
} else {
$output = true;
}
echo json_encode($output);
?>
It never returns anything no matter how I put the $output variables. I've tried other PHP files that I know work in validation, so I think it has something to do with my IF statement, although I'm fairly certain the width is being declared correctly.

Answer 1

You code is invalid. You are setting $size[3] = $width; which sould be $width = $size[0];
Two mistakes:
1. You were setting $size[3] to $width, but should set $width to $size[3]
2. $size[3] containts string valu t use with html image tag(height="yyy" width="xxx"), $size[0] conatins numeric value of width

Answer 2

I think i know your problem, here, the json_enconde function only supports data with UTF-8 encoding, then if your site uses another encoding, the function will return NULL, so try this:
<?php
$title = mysql_real_escape_string($right_form_url);
$size = getimagesize($title);
$size[3] = $width;
$output = true;
if ($width > 1000) {
$output = false;
}
echo json_encode(base64_encode($output));
?>