(PHP 4, PHP 5, PHP 7, PHP 8)
strtolower — Make a string lowercase
$string): string
Returns string with all alphabetic characters
converted to lowercase.
Note that 'alphabetic' is determined by the current locale. This means that e.g. in the default "C" locale, characters such as umlaut-A (Ä) will not be converted.
stringThe input string.
Returns the lowercased string.
Example #1 strtolower() example
<?php
$str = "Mary Had A Little Lamb and She LOVED It So";
$str = strtolower($str);
echo $str; // Prints mary had a little lamb and she loved it so
?>
Note: This function is binary-safe.