What potential issues can arise when using function_exists() to address redeclaration errors in PHP?

Using function_exists() to address redeclaration errors in PHP can lead to potential issues such as masking the root cause of the problem, making the code harder to debug, and potentially causing unexpected behavior if the function is redefined differently in different parts of the code. It is generally recommended to refactor the code to avoid redeclaration errors by organizing functions in a better way or using namespaces. 

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

Keywords

function_exists redeclaration errors PHP namespace autoload

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