You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
47 lines
918 B
47 lines
918 B
2 years ago
|
<?php
|
||
|
|
/**
|
||
|
|
* MIME detection code.
|
||
|
|
*
|
||
|
|
* @todo Maybe we could try to use fileinfo module if loaded
|
||
|
|
*/
|
||
|
|
|
||
|
|
declare(strict_types=1);
|
||
|
|
|
||
|
|
namespace PhpMyAdmin;
|
||
|
|
|
||
|
|
use function chr;
|
||
|
|
use function mb_strlen;
|
||
|
|
use function mb_substr;
|
||
|
|
use function substr;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* PhpMyAdmin\Mime class;
|
||
|
|
*/
|
||
|
|
class Mime
|
||
|
|
{
|
||
|
|
/**
|
||
|
|
* Tries to detect MIME type of content.
|
||
|
|
*
|
||
|
|
* @param string $test First few bytes of content to use for detection
|
||
|
|
*
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
public static function detect(&$test)
|
||
|
|
{
|
||
|
|
$len = mb_strlen($test);
|
||
|
|
if ($len >= 2 && $test[0] == chr(0xff) && $test[1] == chr(0xd8)) {
|
||
|
|
return 'image/jpeg';
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($len >= 3 && substr($test, 0, 3) === 'GIF') {
|
||
|
|
return 'image/gif';
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($len >= 4 && mb_substr($test, 0, 4) == "\x89PNG") {
|
||
|
|
return 'image/png';
|
||
|
|
}
|
||
|
|
|
||
|
|
return 'application/octet-stream';
|
||
|
|
}
|
||
|
|
}
|