Switch — PHP Technical Interview Questions & Answers

Switch

Switch

  • Switch is a PHP topic. In plain words you use it for pass if marks >= 40 in result.php. Don’t start with a slogan — start with that picture.
  • Smallest example: if / foreach ($arr as $row). Type it, run it, and say what you see. If you can do that from memory, you know Switch.
  • From the example next to this theory: Switch: scores array, print avg, then high marks.
  • Trap: foreach by reference then reuse the variable. Fix that before you talk about advanced PHP.
  • Viva: what is Switch? Then show if / foreach ($arr as $row). Then name the trap.

Technical Interview Tip: What is Switch? Show this: if / foreach ($arr as $row). Trap: foreach by reference then reuse the variable.

Code Examples for Switch

Switch — working example

<?php
// Switch
$scores = [80, 90, 70];
$avg = array_sum($scores) / count($scores);
echo "avg=" . number_format($avg, 1) . "\n";
foreach ($scores as $s) {
  if ($s >= 80) echo "high: $s\n";
}

Switch: scores array, print avg, then high marks. Say the output.

How to Explain Switch to an Interviewer

What is Switch?

Used for pass if marks >= 40 result.php Not just the heading

Give one small example of Switch.

if / foreach ($arr as $row) Switch: scores array, print avg, then high marks

What mistake do beginners make with Switch?

foreach by reference then reuse the variable Show the fix

Where do you use Switch?

result.php pass if marks >= 40