- <?php 
-   
-   
- function replaceWord($word, $replacement, $text) { 
-   
- 	$chars = preg_split('//u', $word, -1,-  PREG_SPLIT_NO_EMPTY );
 
- 	$pattern = ""; 
- 	$rusChars = ['е','у','о','р','х','а','с']; 
- 	$rusEngChars = ['(е|e)', '(у|y)', '(о|o)','(р|p)','(х|x)','(а|a)','(с|c)']; 
-   
- 	foreach ($chars as $char) { 
- 		$pattern .= "{$char}\\s?"; 
- 	} 
-   
- 	$pattern = str_replace($rusChars, $rusEngChars, $pattern); 
-   
- 	$result =  preg_replace("/{$pattern}/ui", $replacement, $text); 
- 	echo $result . "\n"; 
- } 
-   
- replaceWord("дурак", "Хороший человек", "Ты дурaк"); // английская 'a' 
- replaceWord("дурак", "Хороший человек", "Ты дУрак"); // регистр 
- replaceWord("дурак", "Хороший человек", "Ты д у р а к"); // с пробелами 
- replaceWord("дурак", "Хороший человек", "Ты Д у Р а к"); // с пробелами и регистром 
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