服务器端php获取图片数据流

<?php$base64 = file_get_contents("php://input"); //获取输入流$base64 = json_decode($base64,1);$data = $base64['base64'];preg_match("/data:image\/(.*);base64,/",$data,$res);$ext = $res[1];if(!in_array($ext,array("jpg","jpeg","png","gif"))){echo json_encode(array("error"=>1));die;}$file = time().'.'.$ext;$data = preg_replace("/data:image\/(.*);base64,/","",$data);if (file_put_contents($file,base64_decode($data))===false) {echo json_encode(array("error"=>1));}else{echo json_encode(array("error"=>0));}