PHP · Theory

Access Modifiers

Theory

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Access Modifiers

If you can teach Access Modifiers using Sara walking through Access Modifiers, you know it. If you only know the heading, you don’t.

For Access Modifiers, the PHP runtime is in play. Don’t blame it until you have traced Sara walking through Access Modifiers.

Without Access Modifiers, a campus project gets messy and Sara walking through Access Modifiers is hard to trust.

Use Access Modifiers when Sara walking through Access Modifiers must stay clear. If a simpler PHP step works, use that instead.

Don’t do this with Access Modifiers: skipping the failure case for Access Modifiers. Interviewers spot it in ten seconds.

Place Access Modifiers next to nearby PHP work — one Access Modifiers step Sara can write from memory is the link.

Close Access Modifiers with: “If I skip it, Sara walking through Access Modifiers goes wrong like this: skipping the failure case for Access Modifiers.”

Exam tip

For Access Modifiers: definition + a campus project + one failure.

Example

<?php
// Access Modifiers
$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";
}

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

Short notes

DefAccess Modifiers — Sara uses it for Sara walking through Access Modifiers in a campus project.
RuleAccess Modifiers → one Access Modifiers step Sara can write from memory.
RememberAccess Modifiers + the PHP runtime (a campus project).
UseAccess Modifiers in a campus project (Sara walking through Access Modifiers).
TrapAccess Modifiers — skipping the failure case for Access Modifiers.
ExAccess Modifiers → Sara walking through Access Modifiers.

<?php // Access Modifiers $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"; }

Access Modifiers

Example

Short notes

Questions

Access Modifiers

Example

Short notes

Questions