Handling string manipulation on multibyte text (such as non-ASCII or internationalized content) used to require manual workarounds because core functions like trim() or ucfirst() only worked reliably on single-byte strings. PHP 8.4 bridges this gap by adding dedicated multibyte helper functions: mb_trim(), mb_ltrim(), mb_rtrim(), mb_ucfirst(), and mb_lcfirst().

PHP 8.4 Example:

PHP
$text = "  hello world  ";
$trimmed = mb_trim($text);

$str = "unicode";
$capitalized = mb_ucfirst($str);

echo $trimmed;     // Outputs: hello world
echo $capitalized; // Outputs: Unicode

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