Add missing access modifiers to methods in WP_Query. Add magic methods for __get(), __set(), __isset(), __unset(), and __call().

Add unit test for magic methods.

See #27881, #22234.


git-svn-id: https://develop.svn.wordpress.org/trunk@28523 602fd350-edb4-49c9-b593-d223f7449a82

tests/phpunit/includes/functions.php

@@ -49,6 +49,18 @@ class Basic_Object {
 		return $this->$name;
 	}
 
+	public function __set( $name, $value ) {
+		return $this->$name = $value;
+	}
+
+	public function __isset( $name ) {
+		return isset( $this->$name );
+	}
+
+	public function __unset( $name ) {
+		unset( $this->$name );
+	}
+
 	public function __call( $name, $arguments ) {
 		return call_user_func_array( array( $this, $name ), $arguments );
 	}