合并前的数组a：

array (size=3)

0 =>

array (size=2)

'id' => string '113' (length=3)

'email' => string 'yintx_1292342352@163.com' (length=24)

1 =>

array (size=2)

'id' => string '111' (length=3)

'email' => string 'yintx_1293456456@163.com' (length=24)

2 =>

array (size=2)

'id' => string '109' (length=3)

'email' => string 'yintx_129@99999.com' (length=19)

合并前的数组b：

array (size=2)

0 =>

array (size=2)

'user_id' => string '113' (length=2)

'count' => string '1' (length=1)

1 =>

array (size=2)

'user_id' => string '109' (length=2)

'count' => string '8' (length=1)

合并后的数组(合并条件，a的id==b的user_id时合并)：

array (size=3)

0 =>

array (size=3)

'id' => string '113' (length=3)

'email' => string 'yintx_1292342352@163.com' (length=24)

'count' => string '1' (length=1)

1 =>

array (size=3)

'id' => string '111' (length=3)

'email' => string 'yintx_1293456456@163.com' (length=24)

'count' => string '0' (length=1)

2 =>

array (size=3)

'id' => string '109' (length=3)

'email' => string 'yintx_129@99999.com' (length=19)

'count' => string '8' (length=1)

回复内容：

合并前的数组a：

array (size=3)

0 =>

array (size=2)

'id' => string '113' (length=3)

'email' => string 'yintx_1292342352@163.com' (length=24)

1 =>

array (size=2)

'id' => string '111' (length=3)

'email' => string 'yintx_1293456456@163.com' (length=24)

2 =>

array (size=2)

'id' => string '109' (length=3)

'email' => string 'yintx_129@99999.com' (length=19)

合并前的数组b：

array (size=2)

0 =>

array (size=2)

'user_id' => string '113' (length=2)

'count' => string '1' (length=1)

1 =>

array (size=2)

'user_id' => string '109' (length=2)

'count' => string '8' (length=1)

合并后的数组(合并条件，a的id==b的user_id时合并)：

array (size=3)

0 =>

array (size=3)

'id' => string '113' (length=3)

'email' => string 'yintx_1292342352@163.com' (length=24)

'count' => string '1' (length=1)

1 =>

array (size=3)

'id' => string '111' (length=3)

'email' => string 'yintx_1293456456@163.com' (length=24)

'count' => string '0' (length=1)

2 =>

array (size=3)

'id' => string '109' (length=3)

'email' => string 'yintx_129@99999.com' (length=19)

'count' => string '8' (length=1)

array_merge_recursive() 函数与 array_merge() 函数 一样，将一个或多个数组的元素的合并起来，一个数组中的值附加在前一个数组的后面。并返回作为结果的数组。

但是，与 array_merge() 不同的是，当有重复的键名时，值不会被覆盖，而是将多个相同键名的值递归组成一个数组。(参见例子 1)

$a = array(

array('id'=>'113','email'=>'yintx_1292342352@163.com'),

array('id'=>'111','email'=>'yintx_1293456456@163.com'),

array('id'=>'109','email'=>'yintx_129@99999.com')

);

$b = array(

array('user_id'=>'113','count'=>'1'),

array('user_id'=>'109','count'=>'8')

);

foreach($a as $ka=>$va){

foreach($b as $kb=>$vb){

if($va['id'] == $vb['user_id']){

$a[$ka]['count'] = $vb['count'];

}

}

}

var_dump($a);

----------

array (size=3)

0 =>

array (size=3)

'id' => string '113' (length=3)

'email' => string 'yintx_1292342352@163.com' (length=24)

'count' => string '1' (length=1)

1 =>

array (size=2)

'id' => string '111' (length=3)

'email' => string 'yintx_1293456456@163.com' (length=24)

2 =>

array (size=3)

'id' => string '109' (length=3)

'email' => string 'yintx_129@99999.com' (length=19)

'count' => string '8' (length=1)

array_merge_recursive($a, $b);

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