2 methods for merging two-dimensional PHP arrays

Example 1

Custom Methods Merge Arrays

First look at a two-dimensional array:

The code is as follows

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<?php Array ( [0] => Array ( [A] => store_name [B] => Store A ) [1] => Array ( [A] => Store_owner [B] => small Wind ) [2] => Array ( [A] => store_name [B] => Store II ) [3] => Array ( [A] => Store_owner [B] => Xiao Lei ) ?> You'll find two store_name and store_owner in there, so I want them to merge into the following. <?php Array ( [0] => Array ( [A] => store a [B] => small Wind ) [1] => Array ( [A] => Store II [B] => Xiao Lei ) ?>

The merge method is as follows:

The code is as follows

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<?php $stores = Array (); Define an empty array $store _count=count ($showinfo); Statistics show the number of times, the $showinfo here is a variable when I get the contents of the database, and then print it out just the way it started. for ($i =0; $i < $store _count; $i + +) { $j = $i +1; Skipping $i plus 1 is equivalent to $j get a value with an odd key value $stores []=array ( ' Name ' => $showinfo [$i] [' value '], ' Owner ' => $showinfo [$j] [' value '], ); $i = $j; The effect here is the equivalent of $i get a value that has a key value of even } ?>

So that we can get the result of the above!

In order for everyone to read more clearly, I write the database table structure as the main fields as follows:

Key value

Store_name Shop A

Store_owner Small Wind

Store_name Shop II

Store_owner Xiao Lei

The front page can be displayed in a row with the above method, as follows

Name owner

Shop a small wind

Shop two small Lei

Example 3

The code is as follows

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<?php $arr = array ( 0 => Array ( ' 1@01,02 ', ' 2@01,02 ', ' 4@all ', ' 3@01 ', ' 5@01,02,04 ', ), 1 => Array ( ' 1@01,02,03 ', ' 2@01,02,04 ', ' 3@all ', ' 4@01,02 ', ' 111@01,05 ', ' 5@03 ', ), 2 => Array ( ' 1@01,02,03 ', ' 2@02,03,05 ', ' 3@all ', ' 4@01,02,03 ', ' 111@01,05 ', ' 5@03 ', ), ); $result = Array (); foreach ($arr as $items) { if (Is_array ($items)) { foreach ($items as $item) { $item = explode (' @ ', $item); if (count ($item)!= 2) { Continue; } $result [$item [0]]. = $item [1]. ', '; } } } Function rejoin (& $item, $key, $seq) { $list = Array_unique (Explode ($seq, $item)); if (In_array (' All ', $list)) { $item = $key. ' @ALL '; }else{ $item = $key. ' @ '. Join ($seq, $list); } } Array_walk ($result, ' rejoin ', ', '); Sort ($result); Var_export ($result); /** * Array ( * 0 => ' 111@01,05, ', * 1 => ' 1@01,02,03, ', * 2 => ' 2@01,02,04,03,05, ', * 3 => ' 3@all ', * 4 => ' 4@all ', * 5 => ' 5@01,02,04,03, ', * ) */ ?>