匿名用户

1级

2013-12-29 回答

php数组根据某一个键值，把相同键值的合并生成一个新的二维数组

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'

)

);1234567891011121314151617181920212223242526272829303132333435363738394041424344

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：

$result= array(); foreach ($infos as $key => $info) { $result[$info['a']][] = $info;

}

print_r($result);123456

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

)

)

)