数组拆分问题
假设数组a：

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

当满足整个total为一定条件时，将数组拆分开来。例中total为675，假设拆分条件为total满足225，也就是拆分为3个数组，如何能将数组拆分成这样？

//b
array (
  0 => 
  array (
    'po_num' => 'DYNP-770266110-00',
    'plant' => 'DYNP',
    'get_date' => '2013-09-09',
    'cust_no' => '12647212',
    'total' => '60',
    'snp' => '15',
    'mount' => '4',
    'lp_no' => 'P000000D',
  ),
  1 => 
  array (
    'po_num' => 'DYNP-770266110-00',
    'plant' => 'DYNP',
    'get_date' => '2013-09-09',
    'cust_no' => '12654172',
    'total' => '165',
    'snp' => '15',
    'mount' => '11',
    'lp_no' => 'P000000D',
  ),
)
//c
array (
  0 => 
  array (
    'po_num' => 'DYNP-770266110-00',
    'plant' => 'DYNP',
    'get_date' => '2013-09-09',
    'cust_no' => '12647212',
    'total' => '225',
    'snp' => '15',
    'mount' => '15',
    'lp_no' => 'P000000D',
  ),
）
//d
array (
  0 => 
  array (
    'po_num' => 'DYNP-770266110-00',
    'plant' => 'DYNP',
    'get_date' => '2013-09-09',
    'cust_no' => '12647212',
    'total' => '225',
    'snp' => '15',
    'mount' => '15',
    'lp_no' => 'P000000D',
  ),
）

[解决办法]

$a = array (
  0 => 
  array (
    'po_num' => 'DYNP-770266110-00',
    'plant' => 'DYNP',
    'get_date' => '2013-09-09',
    'cust_no' => '12647212',
    'total' => '60',
    'snp' => '15',
    'mount' => '4',
    'lp_no' => 'P000000D',
  ),
  1 => 
  array (
    'po_num' => 'DYNP-770266110-00',
    'plant' => 'DYNP',
    'get_date' => '2013-09-09',
    'cust_no' => '12654172',
    'total' => '615',
    'snp' => '15',
    'mount' => '41',
    'lp_no' => 'P000000D',
  ),
);
$t = 225;
foreach($a as $v) {
  $t1 = $v['total'];
  $v['total'] = $t1 % $t;
  $res[] = $v;
  $t1 -= $v['total'];
  while($t1 >= $t) { 
 
    $v['total'] = $t;
    $t1 -= $t;
    $res[] = $v;
  }
}
print_r($res);

Array
(
[0] => Array
(
[po_num] => DYNP-770266110-00
[plant] => DYNP
[get_date] => 2013-09-09
[cust_no] => 12647212
[total] => 60
[snp] => 15
[mount] => 4
[lp_no] => P000000D
)

[1] => Array
(
[po_num] => DYNP-770266110-00
[plant] => DYNP
[get_date] => 2013-09-09
[cust_no] => 12654172
[total] => 165
[snp] => 15
[mount] => 41
[lp_no] => P000000D
)

[2] => Array
(
[po_num] => DYNP-770266110-00
[plant] => DYNP
[get_date] => 2013-09-09
[cust_no] => 12654172
[total] => 225
[snp] => 15
[mount] => 41
[lp_no] => P000000D
)

[3] => Array
(
[po_num] => DYNP-770266110-00
[plant] => DYNP
[get_date] => 2013-09-09
[cust_no] => 12654172
[total] => 225
[snp] => 15
[mount] => 41
[lp_no] => P000000D
)

)

[解决办法]
当然可以，不过有什么意义呢？

$a = array (
  0 => 
  array (
    'po_num' => 'DYNP-770266110-00',
    'plant' => 'DYNP',
    'get_date' => '2013-09-09',
    'cust_no' => '12647212',
    'total' => '60',
    'snp' => '15',
    'mount' => '4',
    'lp_no' => 'P000000D',
  ),
  1 => 
  array (
    'po_num' => 'DYNP-770266110-00',
    'plant' => 'DYNP',
    'get_date' => '2013-09-09',
    'cust_no' => '12654172',
    'total' => '615',
    'snp' => '15',
    'mount' => '41',
    'lp_no' => 'P000000D',
  ),
);
$t = 225;
$k = 0;
foreach($a as $v) {
  $t1 = $v['total'];
  $v['total'] = $t1 % $t;
  $res[$k][] = $v;
  $t1 -= $v['total']; 
 
  while($t1 >= $t) {
    $v['total'] = $t;
    $t1 -= $t;
    $res[++$k] = $v;
  }
}
print_r($res);

Array
(
[0] => Array
(
[0] => Array
(
[po_num] => DYNP-770266110-00
[plant] => DYNP
[get_date] => 2013-09-09
[cust_no] => 12647212
[total] => 60
[snp] => 15
[mount] => 4
[lp_no] => P000000D
)

[1] => Array
(
[po_num] => DYNP-770266110-00
[plant] => DYNP
[get_date] => 2013-09-09
[cust_no] => 12654172
[total] => 165
[snp] => 15
[mount] => 41
[lp_no] => P000000D
)

)

[1] => Array
(
[po_num] => DYNP-770266110-00
[plant] => DYNP
[get_date] => 2013-09-09
[cust_no] => 12654172
[total] => 225
[snp] => 15
[mount] => 41
[lp_no] => P000000D
)

[2] => Array
(
[po_num] => DYNP-770266110-00
[plant] => DYNP
[get_date] => 2013-09-09
[cust_no] => 12654172
[total] => 225
[snp] => 15
[mount] => 41
[lp_no] => P000000D
)

)