Two ways to get the true suffix of a picture in PHP

First, getimagesize (support base64):

2. Code:

   <?php/*@desc：获取图片真实后缀@param   name    文件名@return  suffix  文件后缀*/   function getimgsuffix($name) {$info = getimagesize($name);$suffix = false;if($mime = $info[‘mime‘]){    $suffix = explode(‘/‘,$mime)[1];}return $suffix;}

4. Test:

   $suffix = getimgsuffix(‘http://192.168.8.81/public/image/01.jpg‘);echo $suffix;

6. Output:

   jpeg

   Second, binary method:
8. Code:

   <?php/*@desc：获取文件真实后缀@param   name    文件名@return  suffix  文件后缀*/   function getfilesuffix($name) {$file = fopen($name, "rb");$bin = fread($file, 2); // 只读2字节fclose($file);$info = @unpack("C2chars", $bin);$code = intval($info[‘chars1‘] . $info[‘chars2‘]);$suffix = "unknow";if($code == 255216){    $suffix = "jpg";}elseif($code == 7173){    $suffix = "gif";}elseif($code == 13780){    $suffix = "png";}elseif($code == 6677){    $suffix = "bmp";}elseif($code == 7798){    $suffix = "exe";}elseif($code == 7784){    $suffix = "midi";}elseif($code == 8297){    $suffix = "rar";}elseif($code == 7368){    $suffix = "mp3";}elseif($code == 0){    $suffix = "mp4";}elseif($code == 8273){    $suffix = "wav";}return $suffix;}

10. Test:

    $suffix = getfilesuffix(‘http://192.168.8.81/public/image/01.jpg‘);echo $suffix;

12. Output:

    jpg

Two ways to get the true suffix of a picture in PHP