Regular Expressions — PHP Technical Interview Questions & Answers

Regular Expressions

Regular Expressions

  • Regular Expressions is a PHP topic. In plain words you use it for a short Regular Expressions example in a college portal page. Don’t start with a slogan — start with that picture.
  • Smallest example: the smallest Regular Expressions example you can type. Type it, run it, and say what you see. If you can do that from memory, you know Regular Expressions.
  • From the example next to this theory: Regular Expressions: scores array, print avg, then high marks.
  • Trap: only saying “Regular Expressions” with no example. Fix that before you talk about advanced PHP.
  • Viva: what is Regular Expressions? Then show the smallest Regular Expressions example you can type. Then name the trap.

Technical Interview Tip: What is Regular Expressions? Show this: the smallest Regular Expressions example you can type. Trap: only saying “Regular Expressions” with no example.

Code Examples for Regular Expressions

Regular Expressions — working example

<?php
// Regular Expressions
$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";
}

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

How to Explain Regular Expressions to an Interviewer

What is Regular Expressions?

Used for a short Regular Expressions example a college portal page Not just the heading

Give one small example of Regular Expressions.

the smallest Regular Expressions example you can type Regular Expressions: scores array, print avg, then high marks

What mistake do beginners make with Regular Expressions?

only saying “Regular Expressions” with no example Show the fix

Where do you use Regular Expressions?

a college portal page a short Regular Expressions example