PHP · Theory

str_shuffle()

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Theory

236/352

str_shuffle()

Amit only reaches for str_shuffle() when str_shuffle on Amit's board has to stay correct in a small live site.

For str_shuffle(), the PHP runtime is in play. Don’t blame it until you have traced str_shuffle on Amit's board.

Skip str_shuffle() and skipping the failure case for str_shuffle shows up in a small live site.

Amit ships str_shuffle() in a small live site. That is the use case worth saying.

str_shuffle() trap — skipping the failure case for str_shuffle. Amit loses marks for that every viva.

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

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

Exam tip

For str_shuffle(): definition + a small live site + one failure.

Example

<?php
// str_shuffle()
$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_shuffle(): scores array, print avg, then high marks. Say the output.

Short notes

Defstr_shuffle() — Amit uses it for str_shuffle on Amit's board in a small live site.
Rulestr_shuffle() → one str_shuffle step Amit can write from memory.
Rememberstr_shuffle() + the PHP runtime (a small live site).
Usestr_shuffle() in a small live site (str_shuffle on Amit's board).
Trapstr_shuffle() — skipping the failure case for str_shuffle.
Exstr_shuffle() → str_shuffle on Amit's board.

PHP · Theory

str_shuffle()

← All stacks

Theory

236/352

str_shuffle()

Amit only reaches for str_shuffle() when str_shuffle on Amit's board has to stay correct in a small live site.

For str_shuffle(), the PHP runtime is in play. Don’t blame it until you have traced str_shuffle on Amit's board.

Skip str_shuffle() and skipping the failure case for str_shuffle shows up in a small live site.

Amit ships str_shuffle() in a small live site. That is the use case worth saying.

str_shuffle() trap — skipping the failure case for str_shuffle. Amit loses marks for that every viva.

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

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

Exam tip

For str_shuffle(): definition + a small live site + one failure.

Example

<?php
// str_shuffle()
$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_shuffle(): scores array, print avg, then high marks. Say the output.

Short notes

Defstr_shuffle() — Amit uses it for str_shuffle on Amit's board in a small live site.
Rulestr_shuffle() → one str_shuffle step Amit can write from memory.
Rememberstr_shuffle() + the PHP runtime (a small live site).
Usestr_shuffle() in a small live site (str_shuffle on Amit's board).
Trapstr_shuffle() — skipping the failure case for str_shuffle.
Exstr_shuffle() → str_shuffle on Amit's board.

str_shuffle()

Example

Short notes

Questions

str_shuffle()

Example

Short notes

Questions