Which function should i use for testin if a var isset or not?

Posted by streetparade on Stack Overflow See other posts from Stack Overflow or by streetparade
Published on 2010-03-19T15:05:18Z Indexed on 2010/03/19 15:11 UTC
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I'm sometimes confused to using which one of them,

say i have a function called getmember($id)

function getmember($id)
{

// now this is the confusing part 
// how do i test if a $id was set or not set?

//solution 1
if(empty($id))
{
return false;
}


// solution 2

if(isset($id))
{
return false;
}

}

Thats sometimes not clear tome some times if a parameter in a function is set like function($var="")

Then i do

if($var ==="")
{
return false;
} 

What should i use the next time isset ? emtyp ? or ===''

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