What best practices should be followed when creating a PHP function to iterate through an array and modify its values?

When creating a PHP function to iterate through an array and modify its values, it is important to ensure that the function is clear, efficient, and follows best practices. This includes using a foreach loop to iterate through the array, passing the array by reference to modify its values directly, and using meaningful variable names to improve readability. 

function modifyArrayValues(array &$arr) {
    foreach ($arr as &$value) {
        // Modify the value here
        $value = $value * 2;
    }
}

$array = [1, 2, 3, 4, 5];
modifyArrayValues($array);
print_r($array);

Keywords

foreach array_map array_walk array_walk_recursive pass by reference

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