PHP: Create Image to base64 string (Ottiene immagine da stringa base64 corrispondente)

<?php $base64 = "iVBORw0KGgoAAAANSUhEUgAAABw"   . "AAAASAQMAAAByySynAAAABlBMVEUAAAD///+l2Z/dAAAAP0lEQVQImWN"   . "gPm9gwAAmbM4bH4AQzAdAYiDC/rzxByTi/+f/cIL5AwPnZGYGIGHMwGA"   . "5mdkASNgbMNgJ80AIAMCSHqNvm2VtAAAAAElFTkSuQmCC"; function get_img_type($data) {   $n = array(1,1,2,3);   $e = array("474946383761","474946383961","ffd8ff","89504e470d0a1a0a");   for ($i=0; $i<4; $i++) {     if (strtolower(bin2hex(substr($data,0,strlen($e[$i])/2)))==$e[$i]) return $n[$i];   }   return NULL; } $data = base64_decode($base64); $tp = get_img_type($data); if ($tp) {   $img = imagecreatefromstring($data);   if ($img !== false) {     $type = array("gif","jpeg","png");     header("Content-Type: image/" . $type[$tp-1]);     if ($tp==1) imagegif($img);     if ($tp==2) imagejpeg($img);     if ($tp==3) imagepng($img);     imagedestroy($img);   } else {     echo "An error occurred.";   } } else {   echo "Invalid format! Only GIF, JPEG and PNG."; } ?>