/**
* A helping function for opening different types of image files
*
* @param string $file the file to convert
*
* @return $img
*/
public static function openImage($file)
{
$imageInfo = getimagesize($file);
$memoryNeeded = $imageInfo[0] * $imageInfo[1] * $imageInfo['bits'];
$memoryLimit = strlen(ini_get('memory_limit')) > 0 ? ImageServer::returnBytes(ini_get('memory_limit')) : false;
if ($memoryLimit && $memoryNeeded > $memoryLimit) {
$img = imagecreatefromjpeg("doc-admin/images/placeholder.jpg");
} else {
switch ($imageInfo["mime"]) {
case "image/jpeg":
$img = imagecreatefromjpeg($file);
break;
case "image/gif":
$img = imagecreatefromgif($file);
break;
case "image/png":
$img = imagecreatefrompng($file);
break;
default:
$img = null;
break;
}
}
return $img;
}
