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