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<?php function reverse_vowels($word) { preg_match_all('/[ayeiou]/i', $word, $matches); $vowels = $matches[0]; foreach(str_split($word) as $i=>$c) { echo " i=> $i c=> " . $c . PHP_EOL; if (in_array($c, $matches[0])) { //$v = array_pop($matches[0]); echo " => $i => " . $v . PHP_EOL; $word[$i] = array_pop($vowels); //$word = substr_replace($word, $v, $i, 1); } } return $word; } echo reverse_vowels('kakoy');
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