PHP · Theory

strrpos()

Theory

259/352

strrpos()

If you can teach strrpos() using a strrpos dry-run, you know it. If you only know the heading, you don’t.

Do strrpos() once by hand. one strrpos step Ananya can write from memory. Change one input. Say the new result out loud.

Without strrpos(), a first job task gets messy and a strrpos dry-run is hard to trust.

strrpos() shows up in a first job task. Name a strrpos dry-run, not “a real-world scenario”.

If a strrpos dry-run breaks under strrpos(), check copy-pasting strrpos without a dry-run first.

After strrpos(), Ananya should still remember copy-pasting strrpos without a dry-run.

Viva for strrpos(): what it is → one strrpos step Ananya can write from memory → the mistake (copy-pasting strrpos without a dry-run).

Exam tip

Board: a strrpos dry-run. Dry-run strrpos(). Name the trap: copy-pasting strrpos without a dry-run.

Example

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

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

Short notes

Defstrrpos() — Ananya uses it for a strrpos dry-run in a first job task.
Rulestrrpos() → one strrpos step Ananya can write from memory.
Rememberstrrpos() + a .php page (a first job task).
Usestrrpos() in a first job task (a strrpos dry-run).
Trapstrrpos() — copy-pasting strrpos without a dry-run.
Exstrrpos() → a strrpos dry-run.

PHP · Theory

strrpos()

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Theory

259/352

strrpos()

If you can teach strrpos() using a strrpos dry-run, you know it. If you only know the heading, you don’t.

Do strrpos() once by hand. one strrpos step Ananya can write from memory. Change one input. Say the new result out loud.

Without strrpos(), a first job task gets messy and a strrpos dry-run is hard to trust.

strrpos() shows up in a first job task. Name a strrpos dry-run, not “a real-world scenario”.

If a strrpos dry-run breaks under strrpos(), check copy-pasting strrpos without a dry-run first.

After strrpos(), Ananya should still remember copy-pasting strrpos without a dry-run.

Viva for strrpos(): what it is → one strrpos step Ananya can write from memory → the mistake (copy-pasting strrpos without a dry-run).

Exam tip

Board: a strrpos dry-run. Dry-run strrpos(). Name the trap: copy-pasting strrpos without a dry-run.

Example

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

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

Short notes

Defstrrpos() — Ananya uses it for a strrpos dry-run in a first job task.
Rulestrrpos() → one strrpos step Ananya can write from memory.
Rememberstrrpos() + a .php page (a first job task).
Usestrrpos() in a first job task (a strrpos dry-run).
Trapstrrpos() — copy-pasting strrpos without a dry-run.
Exstrrpos() → a strrpos dry-run.

strrpos()

Example

Short notes

Questions

strrpos()

Example

Short notes

Questions