A typo in the code?

Great class! This is exactly what I need for my project.

I was just wondering though, if there's a typo in the function set_symbols? To me it seems like it sets the variable $conjunctions instead of $symbols.

So this:

public function set_symbols($arr){
if(!is_array($arr))
{
$this->conjunctions = array(mb_strtolower($arr));
}
else
{
$new = array();
foreach($arr as $val)
{
$new[] = mb_strtolower($val);
}
$this->conjunctions = $new;
}
}

should perhaps be changed to this:

public function set_symbols($arr){
if(!is_array($arr))
{
$this->symbols = array(mb_strtolower($arr));
}
else
{
$new = array();
foreach($arr as $val)
{
$new[] = mb_strtolower($val);
}
$this->symbols = $new;
}
}

Yes, you are completely right. I've checked the revision and bug was introduced when I updated the class to use multi byte functions, probably due to copying.

Thank you for stating this, I've updated submitted class. ;)