如 :<?php
$arr=array(a1,a2,a3,a4,a5);
$arra1=array(a1,a2,a3);
$arra2=array(a4,a5);
$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);
$arra2=array(a4,a5,a6);
$arra3=array(a7,a8,a9);
$arra4=array(a10);?>
$arr=array(a1,a2,a3,a4,a5);
$arra1=array(a1,a2,a3);
$arra2=array(a4,a5);
$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);
$arra2=array(a4,a5,a6);
$arra3=array(a7,a8,a9);
$arra4=array(a10);?>
print_r(array_chunk($arr, 3));Array
(
[0] => Array
(
[0] => a1
[1] => a2
[2] => a3
) [1] => Array
(
[0] => a4
[1] => a5
[2] => a6
) [2] => Array
(
[0] => a7
[1] => a8
[2] => a9
) [3] => Array
(
[0] => a10
))
建议你认真看一下手册!