tryphp_callback_functions.php:
<!DOCTYPE html> <html> <body> <?php function my_callback($item) { return strlen($item); } $strings = ["apple", "orange", "banana", "coconut"]; $lengths = array_map("my_callback", $strings); print_r($lengths); ?> </body> </html>
Array ( [0] => 5 [1] => 6 [2] => 6 [3] => 7 )