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? ??? ?? PHP ???? PHP?? ???? ?? ??? ??? ????? ??? ? ?????

PHP?? ???? ?? ??? ??? ????? ??? ? ?????

Dec 26, 2024 am 09:54 AM

How Can I Reliably Verify Uploaded File Types in PHP?

PHP ?? ?? ??: ??? ? ?? ???

PHP??? ???? ?? ??? ???? ?? ??? ??? ???? ? ?????. $_FILES['fupload']['type']? ???? ??? ??? ???? ?? ???? ?? ????? ?? ??? ???? ?? ?????.

$_FILES['fupload' ??? ?? ]['type']

??? ???? ?? ?? $_FILES['fupload']['type'] ? ????? ??? ? ?? ??? ?? ??? ???? ??? ????. ???? ? ?? ?? ???? ?? ??? ??? ? ????. ?????, ? ???? ???? ?? ???? ??? ? ????.

??? ? ?? ?? ?? ??

??? ?? ?? ??? ?? ??- ?? ??. PHP? ??? ???? ??? ? ?? ? ?? ??? ? ?? ??? ?????:

1. EXIF_imagetype()

??? ????? ??? ??? EXIF_imagetype()? ???? ??? ???? ??? ??? ???? ??? ?????. ? ??? ??? ??? ???? ?????.

?:

$allowedTypes = array(IMAGETYPE_PNG, IMAGETYPE_JPEG, IMAGETYPE_GIF);
$detectedType = exif_imagetype($_FILES['fupload']['tmp_name']);
$error = !in_array($detectedType, $allowedTypes);

2. finfo ??(???? ??)

??? PHP ??? ?? ??? ???? ??? ?? ??? ??? ??? ? ????. ??? ??? finfo? ????? ?? extract_imagetype()? ?? ??? ?????.

?:

$finfo = new finfo(FILEINFO_MIME);
$mimeType = $finfo->file($_FILES['fupload']['tmp_name']);
$error = $mimeType !== 'image/gif';

??? ??? ? ?? ??? ???? ???? ??? ????? ??? ? ????. ??? PHP? ???? ???????? ??? ??? ???? ????? ???.

? ??? PHP?? ???? ?? ??? ??? ????? ??? ? ?????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!

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? ?? ??? ????? ???? ??? ??????, ???? ?????? ????. ? ???? ?? ???? ?? ??? ?? ????. ???? ??? ???? ???? ??? ?? admin@php.cn?? ?????.

? AI ??

Undresser.AI Undress

Undresser.AI Undress

???? ?? ??? ??? ?? AI ?? ?

AI Clothes Remover

AI Clothes Remover

???? ?? ???? ??? AI ?????.

Video Face Swap

Video Face Swap

??? ??? AI ?? ?? ??? ???? ?? ???? ??? ?? ????!

???

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???++7.3.1

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???? ?? ?? ?? ???

SublimeText3 ??? ??

SublimeText3 ??? ??

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???? 13.0.1 ???

???? 13.0.1 ???

??? PHP ?? ?? ??

???? CS6

???? CS6

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SublimeText3 Mac ??

SublimeText3 Mac ??

? ??? ?? ?? ?????(SublimeText3)

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