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Asked: 2026-05-26T15:54:29+00:00

What is the maximum file upload size allowed in the post_max_size and upload_max_filesize configuration

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What is the maximum file upload size allowed in the post_max_size and upload_max_filesize configuration options (in PHP 5.3)?

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  1. Editorial Team

    According to the manual entry about post_max_size:

    Note:

    PHP allows shortcuts for bit values, including K (kilo), M (mega) and G (giga).
    PHP will do the conversions automatically if you use any
    of these. Be careful not to exceed the 32 bit signed integer limit (if
    you’re using 32bit versions) as it will cause your script to fail.

    Your limit could be 32bit signed integer limit. ~2,147,483,647 bytes on a 32 bit version. See the PHP_INT_MAX constant to get the value for your system:

    PHP_INT_MAX (integer)

    The largest integer supported in this build of PHP. Usually int(2147483647). Available since PHP 4.4.0 and PHP 5.0.5

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