47 lines
918 B
PHP
47 lines
918 B
PHP
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<?php
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/**
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* MIME detection code.
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*
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* @todo Maybe we could try to use fileinfo module if loaded
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*/
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declare(strict_types=1);
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namespace PhpMyAdmin;
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use function chr;
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use function mb_strlen;
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use function mb_substr;
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use function substr;
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/**
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* PhpMyAdmin\Mime class;
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*/
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class Mime
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{
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/**
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* Tries to detect MIME type of content.
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*
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* @param string $test First few bytes of content to use for detection
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*
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* @return string
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*/
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public static function detect(&$test)
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{
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$len = mb_strlen($test);
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if ($len >= 2 && $test[0] == chr(0xff) && $test[1] == chr(0xd8)) {
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return 'image/jpeg';
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}
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if ($len >= 3 && substr($test, 0, 3) === 'GIF') {
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return 'image/gif';
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}
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if ($len >= 4 && mb_substr($test, 0, 4) == "\x89PNG") {
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return 'image/png';
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}
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return 'application/octet-stream';
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}
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}
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