Warning: stristr() [function.stristr]: Empty delimiter

[prw]

I keep get the following warning whilst using the following function which I wrote. Is there a way of getting rid of the warning?

 

I'm aware I can just turn off error_reporting to not see the warning, but just wondering if there's a way of fixing it.

 

function contains($value, $a, $b = '', $c = '') {

if (isset($b) && isset($c)) {
	if (stristr($value, $a) || stristr($value, $b) || stristr($value, $c))
		return true;

} elseif (isset($b)) {
	if (stristr($value, $a) || stristr($value, $b)) 
		return true;

} else {
	if (stristr($value, $a))
		return true;
	else
		return false;
}
}

[teynon]

You can use @ to mute warnings or you can properly check that variables exist and not have a warning in the first place.

 

if (!empty($b)

 

-- Since its in a function, you know those variables exist. But are they empty or not?

[prw]

Ah right of course, totally forgot that I set $b and $c to be empty, changing the isset's fixed my problem.

 

Thanks for pointing it out.