When you declare a function in your plugin code which has already been declared previously in either WordPress code or in one of the plugins.�����걨�Ĺ�������IJ������������ǰ��������WordPress����������еIJ���� To prevent this you should declare your functions like this:Ϊ�˷�ֹ���������Ӧ���걨���ְ��������ģ� 

 if(!function_exists('your_function_name')) {     function your_function_name() {         //....��� �� function_exists �� ' your_function_name ' �� �� ������your_function_name �� �� �� //.... Function code     } }���ܴ��룩 ��

It is a good idea to always define and consistently use a namespace.����һ�������⣬Ҫʼ����ȷ��һ��ʹ�õ����ֿռ䡣 For example we name all our plugin functions prefixed with tg, to identify our company.�������ǵ������������еIJ�����ܣ�ǰ׺��TG ����ȷ�����ǵĹ�˾��