How can lambda functions with the use() keyword or referenced parameters be used as alternatives to static variables in PHP functions?

When static variables are not suitable for storing persistent data in PHP functions, lambda functions with the use() keyword can be used as an alternative. By referencing external variables within the lambda function, the data can be stored and accessed across multiple function calls without relying on static variables. This approach provides more flexibility and control over the data storage within the function. 

function createCounter() {
    $counter = 0;
    $increment = function() use (&$counter) {
        $counter++;
        return $counter;
    };
    return $increment;
}

$counterFunc = createCounter();
echo $counterFunc(); // Output: 1
echo $counterFunc(); // Output: 2
echo $counterFunc(); // Output: 3

Keywords

lambda functions use() keyword referenced parameters static variables PHP functions

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