PHP · Theory

strrev()

Theory

257/352

strrev()

Sara only reaches for strrev() when a strrev dry-run has to stay correct in a viva board.

strrev() order — meaning → one strrev step Sara can write from memory → one limit. Dumping ten features helps nobody.

Without strrev(), a viva board gets messy and a strrev dry-run is hard to trust.

Sara ships strrev() in a viva board. That is the use case worth saying.

strrev() miss — only reciting the name of strrev. Fix it before you talk about advanced PHP.

strrev() is not a lonely heading. Sara ties it to a strrev dry-run.

One breath for strrev(), then a strrev dry-run, then only reciting the name of strrev. Sit down.

Exam tip

Board: a strrev dry-run. Dry-run strrev(). Name the trap: only reciting the name of strrev.

Example

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

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

Short notes

Defstrrev() — Sara uses it for a strrev dry-run in a viva board.
Rulestrrev() → one strrev step Sara can write from memory.
Rememberstrrev() + the PHP runtime (a viva board).
Usestrrev() in a viva board (a strrev dry-run).
Trapstrrev() — only reciting the name of strrev.
Exstrrev() → a strrev dry-run.

PHP · Theory

strrev()

← All stacks

Theory

257/352

strrev()

Sara only reaches for strrev() when a strrev dry-run has to stay correct in a viva board.

strrev() order — meaning → one strrev step Sara can write from memory → one limit. Dumping ten features helps nobody.

Without strrev(), a viva board gets messy and a strrev dry-run is hard to trust.

Sara ships strrev() in a viva board. That is the use case worth saying.

strrev() miss — only reciting the name of strrev. Fix it before you talk about advanced PHP.

strrev() is not a lonely heading. Sara ties it to a strrev dry-run.

One breath for strrev(), then a strrev dry-run, then only reciting the name of strrev. Sit down.

Exam tip

Board: a strrev dry-run. Dry-run strrev(). Name the trap: only reciting the name of strrev.

Example

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

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

Short notes

Defstrrev() — Sara uses it for a strrev dry-run in a viva board.
Rulestrrev() → one strrev step Sara can write from memory.
Rememberstrrev() + the PHP runtime (a viva board).
Usestrrev() in a viva board (a strrev dry-run).
Trapstrrev() — only reciting the name of strrev.
Exstrrev() → a strrev dry-run.

strrev()

Example

Short notes

Questions

strrev()

Example

Short notes

Questions