- array_splice: documentation ( source)
- array_slice: documentation ( source)
<?php
$a = array(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17);
$b = array_slice($a, 0, 10);
$a = array_splice($a, 0, 10);
foreach ($a as $v) echo 'a'.$v."\n";
foreach ($b as $v) echo 'b'.$v;