Question

How to pass a callback function as a parameter in PHP

Answer 1

function square($number)
{
    return $number * $number;
}

$array = [1, 2, 3, 4, 5, 6];
$array = array_map('square', $array);

echo "<pre>";
print_r($array); 
echo "</pre>";

  
/*
run: 
 
Array
(
    [0] => 1
    [1] => 4
    [2] => 9
    [3] => 16
    [4] => 25
    [5] => 36
)
   
*/  

 

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