This doesn't help get rid of your ternary operator, but I find for
those times when you absolutely, positively have to have a valid non-
negative integer ctype_digit() is the way to go. Both is_numeric and
intval accept the plus sign, the minus sign, a decimal point, the
letter 'e', and strings in hexidecimal form (intval will turn any
string with leading digits into an integer, actually). There are some
issues with casting to an integer, also -- this, for example, gives
somewhat surprising results:
php -r 'echo (int) 12e90;'
Which is great, if that's what you're looking for, but sometimes you
already know that the incoming item should be an actual non-negative
integer and you just want to scrub it to avoid injection attacks or
random db breakage. Something like this might provide a minor upgrade:
$page_index = ctype_digit($_GET['page']) ? $_GET['page'] :
$default_page;
dann
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