Unfortunately, even using Example #4 do not allow to easily detect a bad -x or --xx argument as the last -x or --xx is always “eaten” even if it is bad:
If I use this (Example #4) :
<?php
$rest_index = null;
$opts = getopt('a:b:', [], $rest_index);
$pos_args = array_slice($argv, $rest_index);
var_dump($pos_args);
?>
shell> php example.php -a 1 -b 2
shell> php example.php -a 1 -b 2 --test
shell> php example.php -a 1 -tb 2
All return the same result (-t and --test not defined) :
array(0) {
}
(last one use combining single letters, making user testing much much more complicated)
