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strtolower

PHP function Edit on GitHub ✎

(PHP 4, PHP 5, PHP 7, PHP 8)

Make a string lowercase

Description

strtolower(string $string): string

Returns string with all ASCII alphabetic characters converted to lowercase.

Bytes in the range "A" (0x41) to "Z" (0x5a) will be converted to the corresponding lowercase letter by adding 32 to each byte value.

This can be used to convert ASCII characters within strings encoded with UTF-8, since multibyte UTF-8 characters will be ignored. To convert multibyte non-ASCII characters, use mb_strtolower().

Parameters

string: The input string.

Return Values

Returns the lowercased string.

Changelog

Version	Description

Examples

strtolower() example

php

<?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
?>