D. Dante Lorenso wrote:
I don't think something like this can NOT be written in userspace
because the 'isset' and 'empty' checks need to be run before arguments
can be passed to a user function or warnings will start flying. A
function like this simplifies code which used to look like this:
if (!empty($_POST["postkey"])) {
$value = $_POST["postkey"];
}
elseif (!empty($_GET["getkey"])) {
$value = $_POST["getkey"];
}
elseif (!empty($default_value)) {
$value = $default_value;
}
else {
$value = "hard coded value";
}
Into this:
$value = coalesce($_POST["postkey"], $_GET["getkey"],
$default_value, "hard coded value");
I mean "I DON'T think like this CAN be written in userspace". And, yes,
there is a bug in that code up above (around $_GET testing), but the
'coalesce' function removes the test/set with identical values so
removes those kinds of careless bugs.
Dante
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