Added 'replace' arg to 'what' qualifier in Parser
Fixed support for character escapes in PHP single- and double-quoted strings
Added support for special character escapes in PHP double-quoted strings

\n	linefeed (LF or 0x0A (10) in ASCII)
\r	carriage return (CR or 0x0D (13) in ASCII)
\t	horizontal tab (HT or 0x09 (9) in ASCII)
\v	vertical tab (VT or 0x0B (11) in ASCII)
\e	escape (ESC or 0x1B (27) in ASCII)
\f	form feed (FF or 0x0C (12) in ASCII)
\\	backslash
\$	dollar sign
Fixed support for parsing complex PHP string expressions with interpolation when combined with character escapes