What potential issues may arise when using the ucfirst() function in PHP to capitalize the first letter of a string?

One potential issue that may arise when using the ucfirst() function in PHP is that it only capitalizes the first letter of a string, but it may not handle special characters or multi-byte characters correctly. To solve this issue, you can use the mb_convert_case() function with the MB_CASE_TITLE flag to properly capitalize the first letter of each word in a string, including special characters and multi-byte characters. 

$string = "héllo, wörld!";
$capitalizedString = mb_convert_case($string, MB_CASE_TITLE, "UTF-8");
echo $capitalizedString;

Keywords

ucfirst string manipulation PHP functions character encoding edge cases

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