PHP · Theory

Regular Expressions

Theory

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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.

Exam tip

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

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.

Short notes

DefRegular Expressions — a short Regular Expressions example in a college portal page.
Rulethe smallest Regular Expressions example you can type
Traponly saying “Regular Expressions” with no example
Usea college portal page

PHP · Theory

Regular Expressions

← All stacks

Theory

331/352

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.

Exam tip

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

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.

Short notes

DefRegular Expressions — a short Regular Expressions example in a college portal page.
Rulethe smallest Regular Expressions example you can type
Traponly saying “Regular Expressions” with no example
Usea college portal page

Regular Expressions

Example

Short notes

Questions

Regular Expressions

Example

Short notes

Questions