This function support crop and resize JPEG, GIF, PNG image.
<?php
/**
* @author phptuts
* @copyright 2012
* @link http://tutorialspots.com/
*
* @return resource resized image resource
* @param string $img path to image to be resized
* @param int $width
* @param int $height
*/
function image_crop_resize($img, $width, $height)
{
$infos = @getimagesize($img);
if ($infos == false)
{
trigger_error("Unknown problem trying to open image.", E_USER_ERROR);
}
switch ($infos[2])
{
case 1:
$src = imagecreatefromgif($img);
break;
case 2:
$src = imagecreatefromjpeg($img);
break;
case 3:
$src = imagecreatefrompng($img);
break;
default:
trigger_error("Support JPEG GIF PNG only.", E_USER_ERROR);
break;
}
if ($src == false)
{
trigger_error("Unknown problem trying to open image.", E_USER_ERROR);
}
$ratio = (($infos[0] / $infos[1]) < ($width / $height)) ? $width / $infos[0] : $height / $infos[1];
$x = max(0, round($infos[0] / 2 - ($width / 2) / $ratio));
$y = max(0, round($infos[1] / 2 - ($height / 2) / $ratio));
$resized = imagecreatetruecolor($width, $height);
$result = imagecopyresampled($resized, $src, 0, 0, $x, $y, $width, $height, round($width /
$ratio, 0), round($height / $ratio));
if ($result == false)
{
trigger_error("Error trying to resize and crop image.", E_USER_ERROR);
} else
{
return $resized;
}
}
?>
Example of usage: online demo
<?php
header("Content-Type: image/png");
imagepng(image_crop_resize('http://tutorialspots.com/wp-content/uploads/2012/08/logo1.png', 200, 200));
?>
