strtolower Make a string lowercase &reftitle.description; stringstrtolower stringstring 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. &reftitle.parameters; string The input string. &reftitle.returnvalues; Returns the lowercased string. &reftitle.changelog; &Version; &Description; &strings.changelog.ascii-case-conversion; &reftitle.examples; ]]> &reftitle.notes; ¬e.bin-safe; &reftitle.seealso; strtoupper ucfirst ucwords mb_strtolower