What is the best way to handle plugin functions in PHP to avoid redeclaring errors?

When handling plugin functions in PHP, it is best to use the `function_exists` function to check if a function has already been declared before declaring it again. This helps to avoid redeclaring errors and ensures that the function is only declared once. 

if (!function_exists('my_plugin_function')) {
    function my_plugin_function() {
        // Your plugin function code here
    }
}

Keywords

PHP plugin functions redeclaring errors include_once namespace

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