把数组拆分为三个小数组

Question

如:<?php 
$arr=array(a1,a2,a3,a4,a5,a6,a7,a8,a9);
$arra1=array(a1,a2,a3);
$arra2=array(a4,a5,a6);
$arra3=array(a7,a8,a9);$arr=array(a1,a2,a3,a4,a5,a6,a7,a8);
$arra1=array(a1,a2,a3);
$arra2=array(a4,a5,a6);
$arra3=array(a7,a8);$arr=array(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10);
$arra1=array(a1,a2,a3,a4);
$arra2=array(a5,a6,a7,a8);
$arra3=array(a9,a10);
?>

Answer 1

$arr = array(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10);list($arra1, $arra2, $arra3) = array_chunk($arr, ceil(count($arr)/3));print_r($arra3);Array ( [0] => a9 [1] => a10 )