How good is it to use accept?

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nano_e_t_42016-07-03 13:02:10

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nano_e_t_4, 2016-07-03 13:02:10

Hello everyone
You need to check the extension of the file that is sent to the server. I'm using a function on the web server that checks for an extension, but was advised to use the accept attribute. How reliable is it?
Thanks

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bkosun, 2016-07-03
@bkosun

Accept can also be changed. Check the MIME type on the server side.
php.net/manual/en/function.finfo-file.php