<?php function spin($string) { return preg_replace_callback('/{(?<list>[^{}]+)}/', function ($match) { $list = explode('|', $match['list']); return $list[array_rand($list)]; }, $string); } $sentence = '{Please|Just} make this {cool|awesome|random} test sentence {rotate {quickly|fast} and random|spin and be random}'; echo spin($sentence);
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