Foreach loop randomly throwing “invalid argument supplied” - php

Question

I'm trying to get this function to work but for some reason it errors out on the foreach line saying there is an invalid argument.
$scores= TESTAPI::GUL($user->ID);
if (empty($scores)) {
echo "<p>No Scores</p>";
} else {
foreach ($scores as $score) {
echo "<p>".$score."</p>";
}
}
The error I get is: PHP Warning: Invalid argument supplied for foreach()
Note: I need to keep the if... else... in the order it currently is.
Some variations for the if statement, prior to the for
if(!is_array($scores) && !count($scores) || empty($scores)){
if(!is_array($scores) && !count($scores)){
I can't use use var_dump($scores); because the error is on a page on a private website I run (can't provide links) and I am unable to find a way to recreate the error. Maybe someone knows a way I can capture data that causes the foreach to go wrong and save it to a log file?

Answer 1

You can use error_log in case it is no array:
$scores= TESTAPI::GUL($user->ID);
if (empty($scores)) {
echo "<p>No Scores</p>";
} else {
if(!is_array($scores)) {
$scores_info = print_r($scores, true);
error_log('$scores is no array but: ' . $scores_info);
echo "<p>No Scores</p>";
} else {
foreach ($scores as $score) {
echo "<p>".$score."</p>";
}
}
}
It will write to the error log. You can see more at the error_log doc how to configure it. You should clearly dry it up when you know what the error is, but for temporary catching it this works ...