44 lines
893 B
PHP
44 lines
893 B
PHP
<?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 str_starts_with;
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/**
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* Handles mime type detection
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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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public static function detect(string $test): string
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{
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$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 && str_starts_with($test, 'GIF')) {
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return 'image/gif';
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}
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if ($len >= 4 && str_starts_with($test, "\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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