php - Should a function use: return null;?

Question

Should a function return null?

E.g.

function test()
{
    return null; // vs return;
}

Is the latter considered bad practice or doesn't it matter?

PS

Whether it is bad practice shouldn't be subjective IMHO.

Answer 1

Always is a good practice to show what you're returning.

But as a tip, the following are all equivalent:

function test()
{
    return null;
}


function test()
{
    return;
}


function test()
{

}

In all cases there for var_dump(test()); will be:

NULL