Security reasons my also influence your choice between get and post

$_GET, your variables from the form are passed through the URL, there are some security issues related to this as the user can bookmark this page.

&_POST, less of a security risk because there is no URL passing your data from form to server, also the user can't bookmark the submitted page.

I usauly use $_GET for testing purposes to see if the variable are passed through the URL, when variables are pass I change to $_POST.

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