# [Algorithm] PHP randomly merges arrays and keeps original sorting

Source: Internet
Author: User
: This article mainly introduces the [algorithm] PHP to randomly merge arrays and keep the original sorting. if you are interested in the PHP Tutorial, refer to it. Scenario

The original post List A, now needs to promote new business B in A, you need to in A list of 1:1 mixed B data, random mixing, however, the original data of List A and list B must be sorted. For more information, see the following example.

Principle

1. The total number of elements N is obtained;
2. For loop N times, random number;
3. The values of A and B are obtained from the beginning according to the random number and pushed into the new array;

Code:

``// Randomly merge two array elements to keep the original data sorting unchanged (that is, the elements of each array are sorted in the merged array consistent with their original) function shuffleMergeArray () {\$ mergeArray = array (); \$ sum = count (\$ array1) + count (\$ array2); for (\$ k = \$ sum; \$ k> 0; \$ k --) {\$ number = mt_rand (1, 2); if (\$ number = 1) {\$ mergeArray [] = \$ array2? Array_shift (\$ array2): array_shift (\$ array1);} else {\$ mergeArray [] = \$ array1? Array_shift (\$ array1): array_shift (\$ array2) ;}return \$ mergeArray ;}``

Example:

``Array before merging: \$ array1 = array (1, 2, 3, 4); \$ array2 = array ('A', 'B', 'C', 'D ', 'E'); merged data: \$ mergeArray = array (0 => 'A', 1 => 1, 2 => 'B', 3 => 2, 4 => 'C', 5 => 'D', 6 => 3, 7 => 4, 8 => 'e ',)``

The above introduces the [algorithm] PHP to randomly merge arrays and keep the original sorting, including some content, and hope to be helpful to friends who are interested in PHP tutorials.

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