Which way is better to call a function static way or object way ?

Hi

I'm new to OOPS, Can you guys suggest me which way is better to call a function of a cl开发者_开发问答ass in PHP and why? the scenario is as follows.

class A
{
     function B (){}
}

Which method will take less resource to call the function B

1. A::B();

or

2. $obj = new A();  
   $obj->B();

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Well, the second way creates an unnecessary temporary object, so the first one is faster. But if you have an object created anyway, it wouldn't matter.

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Firstly in PHP 7 calling non-static methods statically is deprecated so you will get an error. Secondly it is better to call the method object way so code will be backward compatible.