Can you provide a full parseable file please?

Also a hit :
$vals = array('foo','bar');
...
} elseif (\in_array($foo, $vals)) {

so it's only when the array is defined "inline"

<?php
$foo = 'bar'; // hit
if (false) { // not hit
echo 'hello 1'; // not hit
} elseif (\in_array($foo, array('foo','bar'))) { // not hit
echo 'hello 2'; // hit
}

This is turning out to be a "bug" in PHP itself, where it does not generate appropriate EXT_STMT hook points for elseif clauses. I have made a patch for PHP itself: https://github.com/php/php-src/pull/8574

As there is nothing for me to do here on the Xdebug side, now the fix has made it into PHP RCs, and will make it into the upcoming releases (php-8.1.7 and php-8.0.20), I am closing this out.

Thanks for the report.

thanks derick!