| Regular expression functions | |
| ============================ | |
| * array preg_grep_ ( array *$subject*, string *$pattern* ) | |
| * bool preg_has_match_ ( string *$subject*, string *$pattern* ) | |
| * array preg_match_ ( string *$subject*, string *$pattern* ) | |
| * string preg_quote_ ( *$str*, [, string *$delim*] ) | |
| * string preg_replace_ ( string *$subject*, string *$pattern*, string *$replace* [, int *$limit*] ) | |
| * array preg_split_ ( string *$subject*, string *$pattern* ) |