php获取图片真实后缀的两种方法

1. 代码：

   <?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;}

2. 测试：

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

3. 输出：

   jpeg

   二、二进制方法：

4. 代码：

   <?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;}

5. 测试：

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

6. 输出：

   jpg

php获取图片真实后缀的两种方法

原文地址：http://blog.51cto.com/12173069/2126591