students.js

for (student in students) {
   // Loop through available students.
   if (typeof student.question !== “undefined”) {
       // If student has question, ask question.
       student.askQuestion();
   }
}

students.php

<?php
foreach($students as $student) {
    // Loop through available students.
    if (isset($student->question)) {
        // If student has question, ask question.
        $student=>askQuestion();
    }
}
?>