[php] Add extern for `version_compare()` (#9858)

* [php] Add extern for `version_compare()`

* Using overload because the return type depends on the set of arguments

* Fix the overload

std/php/Global.hx

@@ -1601,4 +1601,10 @@ extern class Global {
 		@see http://php.net/manual/en/function.http-response-code.php
 	**/
 	static function http_response_code(?response_code:Int):EitherType<Int, Bool>;
+
+	/**
+		@see http://php.net/manual/en/function.version-compare.php
+	**/
+	@:overload(function(version1:String, version2:String, comparisonOperator:String):Bool {})
+	static function version_compare(version1:String, version2:String):Int;
 }