PHP · Theory

Exception Handling

Theory

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Exception Handling

Exception Handling is a PHP topic. In plain words you use it for divide total / count in a report script. Don’t start with a slogan — start with that picture.

Smallest example: try/catch + log. Type it, run it, and say what you see. If you can do that from memory, you know Exception Handling.

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

Trap — empty catch. Fix that before you talk about advanced PHP.

Viva — what is Exception Handling? Then show try/catch + log. Then name the trap.

Exam tip

What is Exception Handling? Show this: try/catch + log. Trap: empty catch.

Example

<?php
// Exception Handling
$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";
}

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

Short notes

DefException Handling — divide total / count in a report script.
Ruletry/catch + log
Trapempty catch
Usea report script

<?php // Exception Handling $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"; }

Exception Handling

Example

Short notes

Questions

Exception Handling

Example

Short notes

Questions