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Home/ Questions/Q 7428659
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Editorial Team
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Editorial Team
Asked: May 29, 20262026-05-29T08:50:16+00:00 2026-05-29T08:50:16+00:00

Is it simply based on the file extension? Do we get PHP’s full analysis

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Is it simply based on the file extension?

Do we get PHP’s full analysis of the file type with the command $_FILES["fileName"]["type"]?

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  1. Editorial Team
    Editorial Team
    2026-05-29T08:50:17+00:00Added an answer on May 29, 2026 at 8:50 am

    Per the manual:

    $_FILES['userfile']['type']

    The mime type of the file, if the browser
    provided this information. An example would be “image/gif”. This mime
    type is however not checked on the PHP side and therefore don’t take
    its value for granted.

    In other words, it’s supplied by the browser and can’t be trusted.

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