lcfirst

Lowercases the first character of a string.

Returns a copy of STRING with the first character converted to lowercase and all other characters left unchanged. For ASCII first characters, a single-byte in-place mutation is used. For Unicode first characters, to_lowercase() may change the byte length.

Returns an empty string when given an empty string.

Synopsis

$result = lcfirst($string);
$result = lcfirst('HELLO');   # "hELLO"

Implementation Notes

perl5 reference: pp.c:4100 S_do_ucfirst (shared ucfirst/lcfirst function). Non-UTF-8 locale path: use libc::tolower on first byte. perl5: pp.c:4228-4233 – toLOWER_LC for first byte.

See Also

PP runtime: lcfirst | ucfirst, uc, lc