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# strtolower

strtolower -- Make a string lowercase

## Description

`string strtolower`(string str);

Returns `string` with all alphabetic characters converted to lowercase.

Note that 'alphabetic' is determined by the current locale. This means that in i.e. the default "C" locale, characters such as umlaut-A (Ä) will not be converted.

See also strtoupper() and ucfirst().

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