PHP two-dimensional array deduplication algorithm

Requirements

Now there is the following 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 the arrays with the second dimension key name name and the same value 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.

Thoughts

When it comes to arrays, we first think of loops in PHP, so it is obviously more suitable to use for loop processing here, which is similar to bubble sorting. Compare one by one, and finally Easy to handle.

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][&#39;name&#39;] == $public_info[$i][&#39;name&#39;]) {
      $public_info[$i][&#39;value&#39;] .= &#39;,&#39; . $public_info[$j][&#39;value&#39;];
      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"
 }
}

Summary

The requirements have been met, Whenever we encounter an array, the first thing we think of besides the ready-made PHP methods is looping, whether it is foreach or for. The above example is a short process of editing a custom form that I handled in my project. I hope it will be helpful to everyone. .

For more articles related to PHP two-dimensional array deduplication algorithm, please pay attention to the PHP Chinese website!