代码:<?php
/**
* 检测文件的真实类型
* @param string $srcPath 文件路径
* @return string $realType 文件真实类型
*/
$imgurl = 'https://ae01.alicdn.com/kf/HTB1w5xdS4TpK1RjSZR0762EwXXa7.png';
echo file_type_detect($imgurl);
function file_type_detect($srcPath){
$types = array(
6677 => 'bmp',
7173 => 'gif',
7368 => 'mp3',
13780 => 'png',
255216 => 'jpg',
);
$binary = curl_get($srcPath);
$bytes = substr($binary, 0, 2);
$head = @unpack('C2char', $bytes);
$typeCode = intval($head['char1'].$head['char2']);
$realType = isset($types[$typeCode]) ? $types[$typeCode] : $typeCode;
return $realType;
}
function curl_get($url){
$ch=curl_init($url);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Linux; U; Android 4.4.1; zh-cn; R815T Build/JOP40D) AppleWebKit/533.1 (KHTML, like Gecko)Version/4.0 MQQBrowser/4.5 Mobile Safari/533.1');
curl_setopt($ch, CURLOPT_TIMEOUT, 10);
$content=curl_exec($ch);
curl_close($ch);
return($content);
}
?>