vfprintf() — PHP Technical Interview Questions & Answers

vfprintf()

vfprintf()

  • vfprintf() 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 vfprintf().
  • From the example next to this theory: vfprintf(): scores array, print avg, then high marks.
  • Trap: missing semicolon. Fix that before you talk about advanced PHP.
  • Viva: what is vfprintf()? Then show echo / print. Then name the trap.

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

Code Examples for vfprintf()

vfprintf() — working example

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

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

How to Explain vfprintf() to an Interviewer

What is vfprintf()?

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

Give one small example of vfprintf().

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

What mistake do beginners make with vfprintf()?

missing semicolon Show the fix

Where do you use vfprintf()?

a web page Hello, Asha