ArrayInterator always true

I'm trying to parse an $agrv array that contain options (without square brackets): [-a "abc" -b "bbc" "bcc" -d "dbc" -e -f] I use ArrayIterator to iterate through the line: - whenever it reach /-\w/, it read through the following qoutes until it reach another /-\w/. The problem is it seems the $iterator->valid() always return TRUE and cause infinte loop. function parseOptions ( $argStream, $handler ) { //Chop first useless argument -- argv[0] array_shift ( $argStream ) ; //Initiate ArrayObject for iterator $arrayobject = new ArrayObject ( $argStream ) ; //Initiate iterator for iteration $iterator = $arrayobject->getIterator(); //If options is set first if( $iterator->valid() && preg_match ( '/^-\w$/', $iterator->current() ) ) { //iterate through whole argument stream for ( ; $iterator->valid(); $iterator->next() ) { //Check if reached next option if( preg_match ( '/^-\w$/', $opts = $iterator->current() ) ) { //Get current options $currOpt = $opts; //echo "$currOpt\n"; //Test if next stream is an option for ($iterator->next(); $iterator->valid(); $iterator->next() ) { if ( preg_match ( '/^-\w$/', $opts = $iterator->current() ) ) { //echo "$currOpt $opts\n"; //$handler($currOpt, $opts); $currOpt = $opts; } var_dump($iterator->valid()); } }//End if //echo "$currOpt $opts\n"; //$handler($currOpt, $opts); }// End for //If option is not set first. } else { //Try other approach. }// End if } I've no idea what is going on. Please help. Regards, Panguin -- 筆使文富，卻使人窮。