How to detect a file type without relying on extensions?
How to detect a file type without relying on extensions?
🚐 The `finfo_file()` function helps detect the real MIME type of a file, not just based on its extension.
🚐 It’s especially useful for validating uploaded files in situations where users might try to rename file extensions.
🚐 You should use it when building secure file upload systems to prevent malicious files from being uploaded.
In this lesson, well uncover a surprising trick with the `finfo_file()` function that many developers dont know about. It doesnt just detect MIME types, BUT it also solves a specific problem: validating files when extensions are unreliable or missing! We’ll see how this function can help secure file uploads and avoid common mistakes in detecting file types when users attempt to bypass security by changing file extensions. Watch till the end for a technique that’ll blow your mind – what?! Did you know finfo_file() could do this?!
GitHub Free Source Code:
🗄️ https://github.com/SergiuPogor/TurboL...
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#PhpFileValidationTrick #PhpMimeTypeTrick #WhatIsFinfo_FileUsedFor #ValidateFileTypesPhp #PhpSecureUploadTips #FileUploadSecurityPhp
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