The array_map Function
The array_map function applies a given
function to all elements of an array and returns
the modified array. The first parameter is the
callback function, and the second is the array.
Additional arrays can be passed as the third
and subsequent parameters.
Syntax
array_map(?callable $callback, array $array, array ...$arrays): array
Example
Let's extract the square root of each
element of the array (using the sqrt function)
and write it to a new array:
<?php
$arr = [1, 4, 9];
$res = array_map('sqrt', $arr);
var_dump($res);
?>
Code execution result:
[1, 2, 3]
See Also
-
the
array_filterfunction,
which filters an array -
the
array_walkfunction,
which calls a function for array elements -
the
array_walk_recursivefunction,
which recursively calls a function for array elements -
the
array_reducefunction,
which reduces an array
