tryphp_func_array_filter.php:
<?php declare(strict_types=1); ?> <!DOCTYPE html> <html> <body> <?php function test_odd($var) { return($var & 1); } $a1=array(1,3,2,3,4); print_r(array_filter($a1,"test_odd")); ?> </body> </html>
Array ( [0] => 1 [1] => 3 [3] => 3 )