For Loop — PHP Technical Interview Questions & Answers

For Loop

For Loop

  • For Loop 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 $row). Type it, run it, and say what you see. If you can do that from memory, you know For Loop.
  • From the example next to this theory: For Loop: scores array, print avg, then high marks.
  • Trap: foreach by reference then reuse the variable. Fix that before you talk about advanced PHP.
  • Viva: what is For Loop? Then show if / foreach ($arr as $row). Then name the trap.

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

Code Examples for For Loop

For Loop — working example

<?php
// For Loop
$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";
}

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

How to Explain For Loop to an Interviewer

What is For Loop?

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

Give one small example of For Loop.

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

What mistake do beginners make with For Loop?

foreach by reference then reuse the variable Show the fix

Where do you use For Loop?

result.php pass if marks >= 40