<?php
 
$string = "депутат рак";
 
$cheat = array('/[a]/', '/[e]/', '/[o]/', '/[y]/', '/[A]/', '/[E]/', '/[O]/', '/[Y]/');
$uncheat = array('а','е','о','у','А','Е','О','У',);
 
$string = preg_replace($cheat, $uncheat, $string);
 
$ru = array();
$ru[] = '/(()*а[^ал]*л[^лл]*л[^ло]*о)/ui';
$ru[] = '/(д[^ду]*у[^ур]*р[^ра]*а[^ак]*к)/ui';
$ru[] = '/п[^пр]*р[^ро]*о[^ощ]*щ[^ща]*а[^ай]*й/ui';
$ru[] = '/!!!!!/';
 
$weaboo = array();
$weaboo[] = 'Моси-моси';
$weaboo[] = 'Бака';
$weaboo[] = 'Сайонара';
$weaboo[] = ' ДЕСУ НЯ!!!!!';
 
$newstring = preg_replace($ru, $weaboo, $string);
 
echo $newstring;

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