PHP: Added support for PHP 8.1 enums (#2752)

Author: Ayesh

components/prism-php.js

@@ -34,7 +34,7 @@
 			}
 		},
 		'class-name-definition': {
-			pattern: /(\b(?:class|interface|trait)\s+)\b[a-z_]\w*(?!\\)\b/i,
+			pattern: /(\b(?:class|enum|interface|trait)\s+)\b[a-z_]\w*(?!\\)\b/i,
 			lookbehind: true,
 			alias: 'class-name'
 		},
@@ -85,7 +85,7 @@
 				alias: 'static-context',
 				greedy: true
 			},
-			/\b(?:__halt_compiler|abstract|and|array|as|break|callable|case|catch|class|clone|const|continue|declare|default|die|do|echo|else|elseif|empty|enddeclare|endfor|endforeach|endif|endswitch|endwhile|eval|exit|extends|final|finally|for|foreach|function|global|goto|if|implements|include|include_once|instanceof|insteadof|interface|isset|list|namespace|match|new|or|parent|print|private|protected|public|require|require_once|return|self|static|switch|throw|trait|try|unset|use|var|while|xor|yield)\b/i
+			/\b(?:__halt_compiler|abstract|and|array|as|break|callable|case|catch|class|clone|const|continue|declare|default|die|do|echo|else|elseif|empty|enddeclare|endfor|endforeach|endif|endswitch|endwhile|enum|eval|exit|extends|final|finally|for|foreach|function|global|goto|if|implements|include|include_once|instanceof|insteadof|interface|isset|list|namespace|match|new|or|parent|print|private|protected|public|require|require_once|return|self|static|switch|throw|trait|try|unset|use|var|while|xor|yield)\b/i
 		],
 		'argument-name': /\b[a-z_]\w*(?=\s*:(?!:))/i,
 		'class-name': [

components/prism-php.min.js

@@ -22,6 +22,8 @@ class Foo extends Bar implements Baz {}
 
 class Foo extends \Package\Bar implements App\Baz {}
 
+enum Foo implements Bar {}
+
 ----------------------------------------------------
 
 [
@@ -194,6 +196,13 @@ class Foo extends \Package\Bar implements App\Baz {}
 		"Baz"
 	]],
 	["punctuation", "{"],
+	["punctuation", "}"],
+
+	["keyword", "enum"],
+	["class-name-definition", "Foo"],
+	["keyword", "implements"],
+	["class-name", "Bar"],
+	["punctuation", "{"],
 	["punctuation", "}"]
 ]