echo() — PHP Technical Interview Questions & Answers

echo()

echo()

  • echo() (function) is a PHP topic. In plain words you use it for Hello, Asha in a web page. Don’t start with a slogan — start with that picture.
  • Smallest example: echo / print. Type it, run it, and say what you see. If you can do that from memory, you know echo() (function).
  • From the example next to this theory: echo(): scores array, print avg, then high marks.
  • Trap: missing semicolon. Fix that before you talk about advanced PHP.
  • Viva: what is echo() (function)? Then show echo / print. Then name the trap.

Technical Interview Tip: What is echo() (function)? Show this: echo / print. Trap: missing semicolon.

Code Examples for echo()

echo() — working example

<?php
// echo()
$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";
}

echo(): scores array, print avg, then high marks. Say the output.

How to Explain echo() to an Interviewer

What is echo() (function)?

Used for Hello, Asha a web page Not just the heading

Give one small example of echo() (function).

echo / print echo(): scores array, print avg, then high marks

What mistake do beginners make with echo() (function)?

missing semicolon Show the fix

Where do you use echo() (function)?

a web page Hello, Asha