<?php
function replaceFool ($text){
$regExp = '/(д|d) ?(у|y) ?(р|p|r) ?(а|a) ?(к|k)/ui';
echo $text."\n!!!!!!\n";
}
$checkText = [
"Попка - дурак!",
"Попка - дуRaК",
"Попка - D у P ak",
"Попка - д-у-р-а-к"
];
foreach($checkText as $text){
echo $text."\n";
replaceFool($text);
}
// your code goes here
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