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• 前端之家
• PHP
• PHP取二进制文件头快速判断文件类型的实现代码

<div class="codebody" id="code30019">
<?PHP
$files = array(
'c:\1.jpg',
'c:\1.png',
'c:\1.gif',
'c:\1.rar',
'c:\1.zip',
'c:\1.exe',
);
foreach ($files AS $file) {
$fp = fopen($file,"rb");
$bin = fread($fp,2); //只读2字节
fclose($fp);
$str_info = @unpack("C2chars",$bin);
$type_code = intval($str_info['chars1'].$str_info['chars2']);
$file_type = '';
switch ($type_code) {
case 7790:
$file_type = 'exe';
break;
case 7784:
$file_type = 'midi';
break;
case 8075:
$file_type = 'zip';
break;
case 8297:
$file_type = 'rar';
break;
case 255216:
$file_type = 'jpg';
break;
case 7173:
$file_type = 'gif';
break;
case 6677:
$file_type = 'bmp';
break;
case 13780:
$file_type = 'png';
break;
default:
$file_type = 'unknown';
break;
} echo $file,' type: ',$file_type,' code:',$type_code,'
'; }