What are the potential issues with using preg_replace to replace words with umlauts in PHP?

Using preg_replace to replace words with umlauts in PHP may lead to unexpected results, as it may not handle multibyte characters properly. To solve this issue, it is recommended to use the mb_ereg_replace function instead, which supports multibyte characters and can handle umlauts correctly. 

$string = "Füße sind schön.";
$new_string = mb_ereg_replace("ü", "ue", $string);
echo $new_string;

Keywords

preg_replace umlauts character encoding multibyte strings regular expressions

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