php实现base64转码成图片

<?php
    /**
    * base64转码图片
    * @param $base64
    * @param string $path
    * @return bool|string
    */
   function get_base64_img($base64,$path = 'data/upload/sign/'){
    if (preg_match('/^(data:s*image/(w+);base64,)/', $base64, $result)){
    $type = $result[2];
       $new_file = $path.time().".{$type}";
  if (file_put_contents($new_file, base64_decode(str_replace($result[1], '', $base64)))){
    return $new_file;
    }else{
    return	false;
    }
    }
   }
?>