PHP UTF-8 Change Text To UPPERCASE – Text To lowercase – Capitalize Each Word – UPPERCASE First Character

<?php
 
	$str_input = "yOUr Text hErE";
	$str_input_tmp = mb_strtolower($str_input,'UTF-8');
 
	$str_return_mb_strtolower = mb_strtolower($str_input_tmp,'UTF-8');
	$str_return_mb_strtoupper = mb_strtoupper($str_input_tmp,'UTF-8');
	$str_return_ucwords = ucwords($str_input_tmp);
	$str_return_ucfirst = ucfirst($str_input_tmp);
 
	$str_return_mb_convert_case_CASE_LOWER = mb_convert_case($str_input_tmp, MB_CASE_LOWER, "UTF-8");
	$str_return_mb_convert_case_CASE_UPPER = mb_convert_case($str_input_tmp, MB_CASE_UPPER, "UTF-8");
	$str_return_mb_convert_case_CASE_TITLE = mb_convert_case($str_input_tmp, MB_CASE_TITLE, "UTF-8");
 
	echo $str_input . "<br><br>";
 
	echo "string to lowercase: " . "<strong>" . $str_return_mb_strtolower . "</strong>" . "<br><br>";
	echo "string to UPPERCASE: " . "<strong>" . $str_return_mb_strtoupper . "</strong>" . "<br><br>";
	echo "Capitalized each word: " . "<strong>" . $str_return_ucwords . "</strong>" . "<br><br>";
	echo "First character in UPPERCASE: " . "<strong>" . $str_return_ucfirst . "</strong>" . "<br><br>";
 
	echo "string to lowercase with MODE MB_CASE_LOWER: " . "<strong>" . $str_return_mb_convert_case_CASE_LOWER . "</strong>" . "<br><br>";
	echo "string to UPPERCASE with MODE MB_CASE_UPPER: " . "<strong>" . $str_return_mb_convert_case_CASE_UPPER . "</strong>" . "<br><br>";
	echo "Capitalized each word with MODE MB_CASE_TITLE: " . "<strong>" . $str_return_mb_convert_case_CASE_TITLE . "</strong>" . "<br><br>";
?>