What are common reasons for the "Fatal error: Cannot redeclare" error in PHP?

The "Fatal error: Cannot redeclare" error in PHP typically occurs when a function or class is declared more than once in the same script or included file. To solve this issue, you can use PHP's `function_exists()` or `class_exists()` functions to check if a function or class has already been declared before declaring it again. 

if (!function_exists('my_function')) {
    function my_function() {
        // Function implementation
    }
}

Keywords

Fatal error Cannot redeclare PHP Function Namespace

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