Question

I’m trying to catch an error

        try     
        {
            $outcome            =   $bet->getElementsByTagName("Outcome");
            $line1              =   $outcome->item(0)->getElementsByTagName("OptionalValue1")->item(0)->nodeValue;                      
            $line2              =   $outcome->item(2)->getElementsByTagName("OptionalValue1")->item(0)->nodeValue;
            $aOdds["line"]      =   ($line1 == 0) ? -$line2 : $line1;

            $aOdds["q1"]        =   $outcome->item(0)->getAttribute("odds"); 
            $aOdds["qx"]        =   $outcome->item(1)->getAttribute("odds"); 
            $aOdds["q2"]        =   $outcome->item(2)->getAttribute("odds");
        }
        catch (Exception $e)
        {
            $outcome            =   $bet->getElementsByTagName("Outcome");
            $line1              =   $outcome->item(0)->getElementsByTagName("OptionalValue1")->item(0)->nodeValue;                      
            $line2              =   $outcome->item(1)->getElementsByTagName("OptionalValue1")->item(0)->nodeValue;
            $aOdds["line"]      =   ($line1 == 0) ? -$line2 : $line1;

            $aOdds["q1"]        =   $outcome->item(0)->getAttribute("odds"); 
            $aOdds["qx"]        =   0; 
            $aOdds["q2"]        =   $outcome->item(1)->getAttribute("odds");
        }

Some data comes with 2 same tag and the others with 3 and I want to catch if there not exist the 3. tag, but the error catching not really work.

Answer 1

You should read a little more about the concept of exceptions. Here are a few links that you might find useful:

http://www.w3schools.com/php/php_exception.asp

http://ciaweb.net/pear-exception-use-guidelines.html

http://php.net/manual/en/language.exceptions.php