Function gets printed twice

I made this function, the same result get printed twice. Any idea why? is it my function? I can't find anything wrong with it.

$valid is an array.

function validOutput($output, $valid, $name, $mirror){
                foreach($valid as $e) {
                    if(strpos($output, $e) != false) {
                        echo '<br />' . $name . '<br />';
                        e开发者_Python百科cho '<textarea cols=100 rows=10>';
                        echo '[tab: Mirror' . $mirror . ']';
                        echo $output;
                        echo "</textarea>"; 
                    }
                }
}

Please tell me if you see anything wrong with it, thanks.

Edit:

$valid = array("facebook", "fbcdn", "megavideo", "video", "videoweed", "4shared");

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$valid has two elements that are substrings of $output

Can you show some sample inputs? Maybe explain what the motivation behind the $valid parameter is?

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I don't know if that could be the problem, but strpos() must be checked as === false or !== false, because strpos could be 0 and it will be treated as false.

Doc > http://php.net/manual/en/function.strpos.php