PHP · Theory

Constants

Theory

12/352

Constants

Constants is a PHP topic. In plain words you use it for a short Constants example in a college portal page. Don’t start with a slogan — start with that picture.

Smallest example: the smallest Constants example you can type. Type it, run it, and say what you see. If you can do that from memory, you know Constants.

From the example next to this theory — Constants: scores array, print avg, then high marks.

Trap — only saying “Constants” with no example. Fix that before you talk about advanced PHP.

Viva — what is Constants? Then show the smallest Constants example you can type. Then name the trap.

Exam tip

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

Example

<?php
// Constants
$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";
}

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

Short notes

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

PHP · Theory

Constants

← All stacks

Theory

12/352

Constants

Constants is a PHP topic. In plain words you use it for a short Constants example in a college portal page. Don’t start with a slogan — start with that picture.

Smallest example: the smallest Constants example you can type. Type it, run it, and say what you see. If you can do that from memory, you know Constants.

From the example next to this theory — Constants: scores array, print avg, then high marks.

Trap — only saying “Constants” with no example. Fix that before you talk about advanced PHP.

Viva — what is Constants? Then show the smallest Constants example you can type. Then name the trap.

Exam tip

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

Example

<?php
// Constants
$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";
}

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

Short notes

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

Constants

Example

Short notes

Questions

Constants

Example

Short notes

Questions