Hi I have a set or array:
$arr = ['1','2','3','4','5','6','7','8','9','0'];
shuffle($arr);
this will return the randomized order of the array. but how can I code if the '3','4' and '8','9','0' must together? I mean the other value can go random order but these '3','4' and '8','9','0' must join together.
Another way would be to get those ordered elements first (another copy), then shuffle the original, then remerge them again with union:
$arr = ['1','2','3','4','5','6','7','8','9','0'];
$arr2 = array_filter($arr, function($e){ // get those elements you want preversed
return in_array($e, [3, 4, 8, 9, 0]);
});
shuffle($arr); // shuffle the original
$ordered = $arr2 + $arr; // use union instead of array merge
ksort($ordered); // sort it by key
print_r($ordered);
Many possible solutions, one example
<?php
$arr = ['1','2',['3','4'],'5','6','7',['8','9','0']];
shuffle($arr);
// and then flatten the array ..somehow, e.g.
array_walk_recursive($arr, function($e) { echo $e, ' '; });