PHP array_map()

Apply callback to array elements

Function Signature

array array_map(?callable $callback, array $array, array ...$arrays)

Description

Apply callback to array elements. The array_map() function is commonly used in PHP for array operations and provides reliable functionality across all PHP versions.

Return Value

Returns array containing results of callback

Example Usage

 $n * 2, [1,2,3]);
var_dump($result);
?>

Important Notes

Preserves keys. Pass null as callback to zip arrays. Multiple arrays supported.

Common Use Cases

The array_map() function is particularly useful when you need to apply callback to array elements. It's frequently used in data processing, validation, transformation, and manipulation tasks throughout PHP applications.

array_map() FAQ

What does array_map() return?

Returns array containing results of callback

When should I use array_map()?

Use array_map() when you need to apply callback to array elements in your PHP code. It's a reliable built-in function available in all PHP versions.

Are there any gotchas with array_map()?

Preserves keys. Pass null as callback to zip arrays. Multiple arrays supported.