PHP · Theory

Static Variables

Theory

68/352

Static Variables

Static Variables is a PHP topic. In plain words you use it for $marks = 72 in a result script. Don’t start with a slogan — start with that picture.

Smallest example: $name = 'Asha';. Type it, run it, and say what you see. If you can do that from memory, you know Static Variables.

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

Trap — using marks without $. Fix that before you talk about advanced PHP.

Viva — what is Static Variables? Then show $name = 'Asha';. Then name the trap.

Exam tip

What is Static Variables? Show this: $name = 'Asha';. Trap: using marks without $.

Example

<?php
// Static Variables
$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";
}

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

Short notes

DefStatic Variables — $marks = 72 in a result script.
Rule$name = 'Asha';
Trapusing marks without $
Usea result script

PHP · Theory

Static Variables

← All stacks

Theory

68/352

Static Variables

Static Variables is a PHP topic. In plain words you use it for $marks = 72 in a result script. Don’t start with a slogan — start with that picture.

Smallest example: $name = 'Asha';. Type it, run it, and say what you see. If you can do that from memory, you know Static Variables.

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

Trap — using marks without $. Fix that before you talk about advanced PHP.

Viva — what is Static Variables? Then show $name = 'Asha';. Then name the trap.

Exam tip

What is Static Variables? Show this: $name = 'Asha';. Trap: using marks without $.

Example

<?php
// Static Variables
$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";
}

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

Short notes

DefStatic Variables — $marks = 72 in a result script.
Rule$name = 'Asha';
Trapusing marks without $
Usea result script

Static Variables

Example

Short notes

Questions

Static Variables

Example

Short notes

Questions