button rand

<?php

$buttons = [];
$buttons[] = '<button type="button" id="a" class="btn btn-primary">Primary</button>';
$buttons[] = '<button type="button" id="b" class="btn btn-danger">danger</button>';
$buttons[] = '<button type="button" id="c" class="btn btn-warning">warning</button>';

 
shuffle($buttons);
print_r($buttons);