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Home/ Questions/Q 6359819
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Editorial Team
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Editorial Team
Asked: May 24, 20262026-05-24T23:34:10+00:00 2026-05-24T23:34:10+00:00

(Coding PHP with MySQL) Fatal error: Cannot redeclare logged_in() (previously declared in C:\xampp\htdocs\Project\Func\user.func.php:9) in

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(Coding PHP with MySQL)

Fatal error: Cannot redeclare logged_in() (previously declared in C:\xampp\htdocs\Project\Func\user.func.php:9) in C:\xampp\htdocs\Project\Func\user.func.php on line 9

I’m making a function to check if a user is logged in. I declare the function as logged_in() {}, but the function causes the error seen above, even though I’ve never declared it before.

The function didn’t work when it was defined either, with an isset and a reference to MySQL code.

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  1. Editorial Team
    Editorial Team
    2026-05-24T23:34:11+00:00Added an answer on May 24, 2026 at 11:34 pm

    even though I’ve never declared it before?

    It must have been declared previously somewhere.

    Maybe you are including user.func.php twice?

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