文件操作 - Mime.php
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文件: /usr/local/cwpsrv/var/services/pma_07-07-2021.bak/libraries/classes/Mime.php
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<?php /* vim: set expandtab sw=4 ts=4 sts=4: */ /** * MIME detection code. * * @package PhpMyAdmin * @todo Maybe we could try to use fileinfo module if loaded */ declare(strict_types=1); namespace PhpMyAdmin; /** * PhpMyAdmin\Mime class; * * @package PhpMyAdmin */ 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'; } }
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