support language php (#4499)

oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/query/entity/Language.java

@@ -19,5 +19,5 @@
 package org.apache.skywalking.oap.server.core.query.entity;
 
 public enum Language {
-    UNKNOWN, JAVA, DOTNET, NODEJS, PYTHON, RUBY, GO, LUA
+    UNKNOWN, JAVA, DOTNET, NODEJS, PYTHON, RUBY, GO, LUA, PHP
 }

oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/query/entity/LanguageTrans.java

@@ -37,6 +37,8 @@ public enum LanguageTrans {
                 return Language.GO;
             case "lua":
                 return Language.LUA;
+            case "php":
+                return Language.PHP;
             default:
                 return Language.UNKNOWN;
         }