How to organize the output randomly?

Question

PHP

Hello, I have two chunks with blocks:
1) $lib.block.profile.3
2) $lib.block.profile.7

I need to display them in the template, only that each time they visit the page, they change places.
I have a snippet that I display in a template, now it looks like this:

<?php

$output = 'lib.block.profile.7';
if ($modx->resource->id==54) {
  $output = 'lib.block.profile.3';
}

return $modx->getChunk($output);

What is the condition for random output?

Answer 1

$output = random_int(0, 1) ? 'lib.block.profile.7' : 'lib.block.profile.3';

Answer 2

// Список чанков оформляется в массив
$chunks = [
    'lib.block.profile.7',
    'lib.block.profile.3',
];
if ($modx->resource->id==54) {
    $output = $chunks[1]; // Не знаю, нужно ли вам это условие
} else {
    // Но если оно не выполняется, в $output кладется случайное значение чанка из массива
    $output = $chunks[rand(0, count($chunks) - 1)];
}
// Возвращается обработанный чанк
return $modx->getChunk($output);

Answer 3

You need to display them in the template, only that each time you visit the page, they change places

If you need to swap places - random is not quite suitable. It is necessary to plant a cookie for the visitor, by which it will be clear what order of blocks was during the previous visit. Change the order of blocks, and when displaying the page, set the cookie again with this order of blocks. Then the blocks will be exactly swapped.