PHP: array_map() function
PHP: Applies the callback to the elements of the given arrays
The array_map() function sends each value of an array to a user defined function and gets an array with new values applied by the user defined function.
Version:
(PHP 4 and above)
Syntax:
array_map(user-supplied-function, array1, array2, ...)
Parameters:
| Name | Description | Required / Optional |
Type |
|---|---|---|---|
| user_function | The user defined function to run for each element in each array. | Required | Array |
| array1 | Specifies an array to run through the user defined function | Required | Array |
| array2.... | Specifies an array to run through the user defined function | Optional | Array |
Return value:
An array containing all the elements of array1 after applying the user_function() to each one.
Value Type: Array
Example:
<?php
function square($x)
{
return($x * $x);
}
$a = array(10,12,14,16,18,20);
$b = array_map("square",$a);
print_r($b);
?>
Output:
Array( [0] => 100 [1] => 144 [2] => 196 [3] => 256 [4] => 324 [5] => 400)
Pictorial Presentation:
View the example in the browser
Practice here online :
See also
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