fix(php): Remove duplicate highlighting of special values

Originally proposed in scopatz#378

php.nanorc

@@ -5,7 +5,7 @@ comment "//"
 color white start="<\?(php|=)?" end="\?>"
 # Constructs
 color brightblue "(class|extends|goto) ([a-zA-Z0-9_]*)"
-color brightblue "[^a-z0-9_-]{1}(var|class|function|echo|case|break|default|exit|switch|if|else|elseif|endif|foreach|endforeach|@|while|public|private|protected|return|true|false|null|TRUE|FALSE|NULL|const|static|extends|as|array|require|include|require_once|include_once|define|do|continue|declare|goto|print|in|namespace|use)[^a-z0-9_-]{1}"
+color brightblue "[^a-z0-9_-]{1}(var|class|function|echo|case|break|default|exit|switch|if|else|elseif|endif|foreach|endforeach|@|while|public|private|protected|return|const|static|extends|as|array|require|include|require_once|include_once|define|do|continue|declare|goto|print|in|namespace|use)[^a-z0-9_-]{1}"
 color brightblue "[a-zA-Z0-9_]+:"
 # Variables
 color green "\$[a-zA-Z_0-9$]*|[=!<>]"
@@ -14,7 +14,7 @@ color green "\->[a-zA-Z_0-9$]*|[=!<>]"
 color brightblue "([a-zA-Z0-9_-]*)\("
 # Special values
 color brightmagenta "[^a-z0-9_-]{1}(true|false|null|TRUE|FALSE|NULL)$"
-color brightmagenta "[^a-z0-9_-]{1}(true|false|null|TRUE|FALSE|NULL)[^a-z0-9_-]{1}"
+color brightmagenta "[^a-z0-9_-]{1}(true|false|null|TRUE|FALSE|NULL)[^A-Za-z0-9_-]{1}"
 # Special Characters
 color yellow "[.,{}();]"
 color cyan "\["