(PHP 4, PHP 5, PHP 7)
strtolower — Make a string lowercase
strtolower ( string $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.
string
The 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.
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https://www.php.net/manual/en/function.strtolower.php