aspect ratio of an image

image_ratio_helper.php

<?php

// Exists functions gmp_gcd ?
if(!function_exists('gmp_gcd')){
   // No, so create 
   // find greatest common divisor
   function gmp_gcd($a, $b) {  
      while ($b != 0)  
         $remainder = $a % $b;  
         $a = $b;  
         $b = $remainder;  
      }  
      return abs ($a);  
   }  
}

// Provide a two argument and return an array with two value, 
// for exemple [3:1]
function ration_image ($width, $height){ 
    $gcd = gmp_gcd($width, $height);  
    $width = $width/$gcd;  
    $height = $height/$gcd;  
    return array($width,$height); 
}





?>