php数组实现根据某个键值将相同键值合并生成新二维数组的方法

本文实例讲述了php数组实现根据某个键值将相同键值合并生成新二维数组的方法。分享给大家供大家参考，具体如下：

源数据：

$infos = array(  array(    "a" => 36,    "b" => "xa",    "c" => "2015-08-28 00:00:00",    "d" => "2015/08/438488a00b3219929282e3652061c2e3.png"  ),  array(    "a" => 3,    "b" => "vd",    "c" => "2015-08-20 00:00:00",    "d" => "2015/08/438488a00b3219929282e3652061c2e3.png"  ),  array(    "a" => 6,    "b" => "wwe",    "c" => "2015-08-28 00:00:00",    "d" => "2015/08/438488a00b3219929282e3652061c2e3.png"  ),  array(    "a" => 36,    "b" => "se",    "c" => "2015-08-28 00:00:00",    "d" => "2015/08/438488a00b3219929282e3652061c2e3.png"  ),  array(    "a" => 6,    "b" => "aw",    "c" => "2015-08-28 00:00:00",    "d" => "2015/08/438488a00b3219929282e3652061c2e3.png"  ),  array(    "a" => 36,    "b" => "bv",    "c" => "2015-08-28 00:00:00",    "d" => "2015/08/438488a00b3219929282e3652061c2e3.png"  ),  array(    "a" => 12,    "b" => "xx",    "c" => "2015-08-27 00:00:00",    "d" => "2015/08/438488a00b3219929282e3652061c2e3.png"  ));

处理要求：将数组中a相同的二维数组合并到一个数组中，生成一个新的数组

代码：

<?php $result= array(); foreach ($infos as $key => $info) {  $result[$info["a"]][] = $info; } print_r($result);

输出：

Array( [36] => Array  (   [0] => Array    (     [a] => 36     [b] => xa     [c] => 2015-08-28 00:00:00     [d] => 2015/08/438488a00b3219929282e3652061c2e3.png    )   [1] => Array    (     [a] => 36     [b] => se     [c] => 2015-08-28 00:00:00     [d] => 2015/08/438488a00b3219929282e3652061c2e3.png    )   [2] => Array    (     [a] => 36     [b] => bv     [c] => 2015-08-28 00:00:00     [d] => 2015/08/438488a00b3219929282e3652061c2e3.png    )  ) [3] => Array  (   [0] => Array    (     [a] => 3     [b] => vd     [c] => 2015-08-20 00:00:00     [d] => 2015/08/438488a00b3219929282e3652061c2e3.png    )  ) [6] => Array  (   [0] => Array    (     [a] => 6     [b] => wwe     [c] => 2015-08-28 00:00:00     [d] => 2015/08/438488a00b3219929282e3652061c2e3.png    )   [1] => Array    (     [a] => 6     [b] => aw     [c] => 2015-08-28 00:00:00     [d] => 2015/08/438488a00b3219929282e3652061c2e3.png    )  ) [12] => Array  (   [0] => Array    (     [a] => 12     [b] => xx     [c] => 2015-08-27 00:00:00     [d] => 2015/08/438488a00b3219929282e3652061c2e3.png    )  ))

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希望本文所述对大家PHP程序设计有所帮助。