对于PHP中的每个循环错误输出“提供的无效参数”

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()

Answer 1

$scores = TESTAPI::GUL($user->ID);

if (is_array($scores) && count($scores)) {
    foreach ($scores as $score) {
        echo "<p>".$score."</p>";
    }
} else {
    echo "<p>No Scores</p>";
}