将已知数组按条件分成若个新数组

将已知数组按条件分为若个新数组
已知数组：

array (<br />
  0 => <br />
  array (<br />
    'po_num' => 'DYNP-770266110-00',<br />
    'plant' => 'DYNP',<br />
    'get_date' => '2013-09-09',<br />
    'cust_no' => '12654172',<br />
    'total' => '615',<br />
    'snp' => '15',<br />
    'mount' => '41',<br />
    'lp_no' => 'P000000D',<br />
  ),<br />
  1 => <br />
  array (<br />
    'po_num' => 'DYNP-770266110-00',<br />
    'plant' => 'DYNP',<br />
    'get_date' => '2013-09-09',<br />
    'cust_no' => '12647212',<br />
    'total' => '60',<br />
    'snp' => '15',<br />
    'mount' => '4',<br />
    'lp_no' => 'P000000D',<br />
  ),<br />
)

能否按字段total为100为单位把数组再分为若干个新的数组？并加上序号字段在其中，比如：

<br />
  array (<br />
    'po_num' => '1/7',//新增字段信息<br />
    'po_num' => 'DYNP-770266110-00',<br />
    'plant' => 'DYNP',<br />
    'get_date' => '2013-09-09',<br />
    'cust_no' => '12654172',<br />
    'total' => '615',<br />
    'snp' => '15',<br />
    'mount' => '41',<br />
    'lp_no' => 'P000000D',<br />
  ),<br />
...<br />
）

分享到：
------解决方案--------------------
又来了？

$ar = array (<br />
  0 => <br />
  array (<br />
    'po_num' => 'DYNP-770266110-00',<br />
    'plant' => 'DYNP',<br />
    'get_date' => '2013-09-09',<br />
    'cust_no' => '12654172',<br />
    'total' => '615',<br />
    'snp' => '15',<br />
    'mount' => '41',<br />
    'lp_no' => 'P000000D',<br />
  ),<br />
  1 => <br />
  array (<br />
    'po_num' => 'DYNP-770266110-00',<br />
    'plant' => 'DYNP',<br />
    'get_date' => '2013-09-09',<br />
    'cust_no' => '12647212',<br />
    'total' => '60',<br />
    'snp' => '15',<br />
    'mount' => '4',<br />
    'lp_no' => 'P000000D',<br />
  ),<br />
);

$split_num = 100;

foreach($ar as $item) {

  if($item['total'] <= $split_num) {

    $res[] = $item;

    continue;

  }

  $total = $item['total'];

  $n = ceil($total/$split_num);

  for($i=1; $i<$n; $i++) {

    $res[] = array_merge(array('po_nume' => "$i/$n"), $item, array('total' => $split_num));

  }

  $res[] = array_merge(array('po_nume' => "$i/$n"), $item, array('total' => $total%$split_num));

}

print_r($res);

Array<br>
(<br>
    [0] => Array<br>
        (<br>
            [po_nume] => 1/7<br>
            [po_num] => DYNP-770266110-00<br>
            [plant] => DYNP<br>
            [get_date] => 2013-09-09<br>
            [cust_no] => 12654172<br>
            [total] => 100<br>
            [snp] => 15<br>
            [mount] => 41<br>
            [lp_no] => P000000D<br>
        )<br>
<br>
    [1] => Array<br>
        (<br>
            [po_nume] => 2/7<br>
            [po_num] => DYNP-770266110-00 <div class="clear">
                 
              
              
        
            </div>