PHP two-dimensional array deduplication algorithm sample code

The code shared with you in this article is implemented in PHPTwo-dimensional arrayThe algorithm of merging and deduplicating according to key values ​​is very practical. Friends in need can refer to it. Now there is the following A set of two-dimensional arrays:

array(8) {
 [0]=>
 array(2) {
  ["name"]=>
  string(4) "name"
  ["value"]=>
  string(6) "青叶"
 }
 [1]=>
 array(2) {
  ["name"]=>
  string(5) "phone"
  ["value"]=>
  string(11) "13812341234"
 }
 [2]=>
 array(2) {
  ["name"]=>
  string(12) "fileds_507[]"
  ["value"]=>
  string(12) "我是青叶"
 }
 [3]=>
 array(2) {
  ["name"]=>
  string(12) "fileds_508[]"
  ["value"]=>
  string(6) "合肥"
 }
 [4]=>
 array(2) {
  ["name"]=>
  string(12) "fileds_509[]"
  ["value"]=>
  string(3) "男"
 }
 [5]=>
 array(2) {
  ["name"]=>
  string(12) "fileds_510[]"
  ["value"]=>
  string(6) "足球"
 }
 [6]=>
 array(2) {
  ["name"]=>
  string(12) "fileds_510[]"
  ["value"]=>
  string(6) "棒球"
 }
 [7]=>
 array(2) {
  ["name"]=>
  string(12) "fileds_511[]"
  ["value"]=>
  string(16) "2016-12-15T11:15"
 }
}

It is necessary to merge the values ​​of arrays with the same key name and the same value in the second dimension to form a new array.

For example, the two two-dimensional arrays named fields_510 in the above code should be merged into an array with the values ​​​​of football and baseball.

Thinking

When it comes to arrays, in PHP we first think of loop, so it is obviously more suitable to use here The for loop processing is similar to bubble sorting. It is best to compare one by one.

Code

The code is as follows:

$public_info = 数组;
for ($i=0;$i<count($public_info);$i++) {
  for ($j=$i+1;$j<count($public_info);$j++) {
    if ($public_info[$j]['name'] == $public_info[$i]['name']) {
      $public_info[$i]['value'] .= ',' . $public_info[$j]['value'];
      unset($public_info[$j]);
    }
  }
}

Execution result:

array(7) {
 [0]=>
 array(2) {
  ["name"]=>
  string(4) "name"
  ["value"]=>
  string(6) "青叶"
 }
 [1]=>
 array(2) {
  ["name"]=>
  string(5) "phone"
  ["value"]=>
  string(11) "13812341234"
 }
 [2]=>
 array(2) {
  ["name"]=>
  string(12) "fileds_507[]"
  ["value"]=>
  string(12) "我是青叶"
 }
 [3]=>
 array(2) {
  ["name"]=>
  string(12) "fileds_508[]"
  ["value"]=>
  string(6) "合肥"
 }
 [4]=>
 array(2) {
  ["name"]=>
  string(12) "fileds_509[]"
  ["value"]=>
  string(3) "男"
 }
 [5]=>
 array(2) {
  ["name"]=>
  string(12) "fileds_510[]"
  ["value"]=>
  string(13) "足球,棒球"
 }
 [7]=>
 array(2) {
  ["name"]=>
  string(12) "fileds_511[]"
  ["value"]=>
  string(16) "2016-12-15T11:15"
 }
}

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