string function addcslashes
string function addslashes
string function chop()
string function chunk_split
string function count_chars
string function explode
string function implode
string function md5
string function nl2br
string function print
string function printf
string function trim
string function similar_text
string function str_replace
string function str_repeat
string function str_shuffle
string function str_split
string function str_word_count