PHP · Theory

str_rot13()

Theory

235/352

str_rot13()

str_rot13() is simple if you keep it on paper. Amit uses it for a str_rot13 dry-run in a campus project.

str_rot13() order: meaning → one str_rot13 step Amit can write from memory → one limit. Dumping ten features helps nobody.

Skip str_rot13() and skipping the failure case for str_rot13 shows up in a campus project.

Use str_rot13() when a str_rot13 dry-run must stay clear. If a simpler PHP step works, use that instead.

Don’t do this with str_rot13() — skipping the failure case for str_rot13. Interviewers spot it in ten seconds.

After str_rot13(), Amit should still remember skipping the failure case for str_rot13.

Viva for str_rot13(): what it is → one str_rot13 step Amit can write from memory → the mistake (skipping the failure case for str_rot13).

Exam tip

Board: a str_rot13 dry-run. Dry-run str_rot13(). Name the trap: skipping the failure case for str_rot13.

Example

<?php
// str_rot13()
$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";
}

str_rot13(): scores array, print avg, then high marks. Say the output.

Short notes

Defstr_rot13() — Amit uses it for a str_rot13 dry-run in a campus project.
Rulestr_rot13() → one str_rot13 step Amit can write from memory.
Rememberstr_rot13() + a .php page (a campus project).
Usestr_rot13() in a campus project (a str_rot13 dry-run).
Trapstr_rot13() — skipping the failure case for str_rot13.
Exstr_rot13() → a str_rot13 dry-run.

PHP · Theory

str_rot13()

← All stacks

Theory

235/352

str_rot13()

str_rot13() is simple if you keep it on paper. Amit uses it for a str_rot13 dry-run in a campus project.

str_rot13() order: meaning → one str_rot13 step Amit can write from memory → one limit. Dumping ten features helps nobody.

Skip str_rot13() and skipping the failure case for str_rot13 shows up in a campus project.

Use str_rot13() when a str_rot13 dry-run must stay clear. If a simpler PHP step works, use that instead.

Don’t do this with str_rot13() — skipping the failure case for str_rot13. Interviewers spot it in ten seconds.

After str_rot13(), Amit should still remember skipping the failure case for str_rot13.

Viva for str_rot13(): what it is → one str_rot13 step Amit can write from memory → the mistake (skipping the failure case for str_rot13).

Exam tip

Board: a str_rot13 dry-run. Dry-run str_rot13(). Name the trap: skipping the failure case for str_rot13.

Example

<?php
// str_rot13()
$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";
}

str_rot13(): scores array, print avg, then high marks. Say the output.

Short notes

Defstr_rot13() — Amit uses it for a str_rot13 dry-run in a campus project.
Rulestr_rot13() → one str_rot13 step Amit can write from memory.
Rememberstr_rot13() + a .php page (a campus project).
Usestr_rot13() in a campus project (a str_rot13 dry-run).
Trapstr_rot13() — skipping the failure case for str_rot13.
Exstr_rot13() → a str_rot13 dry-run.

str_rot13()

Example

Short notes

Questions

str_rot13()

Example

Short notes

Questions