Detailed explanation of the method of php array implementation to merge the same key values ​​to generate a new two-dimensional array based on a certain key value

This article mainly introduces the method of php array to merge the same key values ​​​​according to a certain key value to generate a new two-dimensional array, involving the traversal and assignment of php arrays related operation skills, friends in need can refer to it

The example of this article describes the method of php array implementation to merge the same key values ​​​​according to a certain key value to generate a new two-dimensional array. Share it with everyone for your reference, the details are as follows:

Source data:

$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'
  )
);

Processing requirements: Convert two-dimensional arrays with the same a in the array Merge into an array to generate a new array

Code:

<?php
 $result= array();
 foreach ($infos as $key => $info) {
  $result[$info[&#39;a&#39;]][] = $info;
 }
 print_r($result);

Output:

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
    )
  )
)

The above is the entire content of this article, I hope it will be helpful to everyone's study.

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