Update php.nanorc

A much better grammar for php.

Found and taken from: https://code.google.com/p/nanosyntax/issues/detail?id=4

php.nanorc

@@ -1,20 +1,40 @@
-## PHP syntax highlighting
-##
-syntax "php" "\.php$" "\.php[2345s]$" "\.phtml$"
-#functions
-color brightmagenta "([A-Za-z0-9])"
-#numbers
-color brightblue "[0-9]"
-#special
-color brightwhite "(^|[^A-Za-z0-9])(<\?php|\?>|var|and|or|default|class|extends|true|false|global|function|new|switch|case|break|next|prev|elseif|if|else|foreach|for|as|do|while|exit|die|declare|require_once|require|include_once|include|return|echo|static|array|isset)([^A-Za-z0-9])"
-#types
-color brightred "([^A-Za-z0-9])|[^A-Za-z](null|int|string|float|bool|object|resource)[^A-Za-z0-9_]+[^A-Za-z]"
-#strings
-color brightyellow ""(\\.|[^\"])*""
-color brightyellow "'(\\.|[^\'])*'"
-#Variables
-color brightcyan "\$[]\[A-Za-z0-9_'\"]*"
-#comments
-color green "//.*"
-color green "#.*"
-color green start="/\*" end="\*/"
+## PHP Syntax Highlighting
+syntax "php" "\.php[2345s~]?$"
+color white start="<\?(php|=)?" end="\?>"
+# Functions
+color brightblue "([a-zA-Z0-9_-]*)\("
+# Constructs
+color brightblue "(class|extends|goto) ([a-zA-Z0-9_]*)"
+color green "[^a-z0-9_-]{1}(var|class|function|echo|case|break|default|exit|switch|if|else|elseif|endif|foreach|endforeach|@|while|public|private|protected|returtrue|false|null|TRUE|FALSE|NULL|const|static|extends|as|array|require|include|require_once|include_once|define|do|continue|declare|goto|print|in)[^a-z0-9_-]{1}"
+color brightblue "[a-zA-Z0-9]+:"
+# Variables
+color white "\$[a-zA-Z_0-9$]*|[=!<>]"
+color white "\->[a-zA-Z_0-9$]*|[=!<>]"
+# Special Characters
+color yellow "[.,{}();]"
+color yellow "\["
+color yellow "\]"
+color yellow "[=][^>]"
+# Numbers
+color magenta "[+-]*([0-9]\.)*[0-9]+([eE][+-]?([0-9]\.)*[0-9])*"
+color magenta "0x[0-9a-zA-Z]*"
+# Special Variables
+color brightblue "(\$this|parent::|self::|\$this-\>)"
+# Bitwise Operations
+color magenta "(\;|\||\^){1}"
+# And/Or/SRO/etc
+color green "(\;\;|\|\||::|=>|->)"
+# Online Comments
+color brightyellow "(#.*|//.*)$"
+# STRINGS!
+color red "('[^']*?')|(\"[^\"]*?\")"
+# Inline Variables
+color white "\{\$[^}]*\}"
+# PHP Tags
+color red "(<\?(php)?|\?>)"
+# General HTML
+color red start="\?>" end="<\?(php|=)?"
+# trailing whitespace
+color ,green "[^[:space:]]{1}[[:space:]]+$"
+# multi-line comments
+color brightyellow start="/\*" end="\*/"