array map 28 29

1
2  <?php
3function my_callback($item) {
4  return strlen($item);
5}
6
7
8  $strings = ["apple", "orange", 
9  "banana", "coconut"];
10$lengths = 
11  array_map("my_callback", $strings);
12print_r($lengths);
13?> 

1The array_map() function sends each value of an array to a user-made function, and returns an array with new values, given by the user-made function.
2
3Tip: You can assign one array to the function, or as many as you like.
4
5Syntax
6array_map(functionname, array1, array2, array3, ...)
7  
8Example
9Send each value of an array to a function, multiply each value by itself, and return an array with the new values:
10
11<?php
12function myfunction($val)
13{
14  return($val*$val);
15}
16
17$a=array(1,2,3,4,5);
18print_r(array_map("myfunction",$a));
19?>

1Array
2(
3    [0] => Array
4        (
5            [1] => Hamza
6           [1] => Hamza
7           [1] => Hamza
8           [1] => Hamza
9           [1] => Hamza
10        )
11
12    [1] => Array
13        (
14            [2] => Bilal
15        )
16
17    [2] => Array
18        (
19            [3] => Asad
20        )
21
22    [3] => Array
23        (
24            [4] => Asif Bhai
25        )
26
27    [4] => Array
28        (
29            [5] => Waqas
30        )
31
32    [5] => Array
33        (
34            [6] => Umair
35        )
36
37)
38