PHP · Theory

ftp_delete()

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Theory

300/352

ftp_delete()

Priya only reaches for ftp_delete() when a ftp_delete dry-run has to stay correct in lab hour.

For ftp_delete(), the PHP runtime is in play. Don’t blame it until you have traced a ftp_delete dry-run.

ftp_delete() exists so Priya can keep a ftp_delete dry-run correct in lab hour.

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

ftp_delete() trap — skipping the failure case for ftp_delete. Priya loses marks for that every viva.

After ftp_delete(), Priya should still remember skipping the failure case for ftp_delete.

Close ftp_delete() with: “If I skip it, a ftp_delete dry-run goes wrong like this: skipping the failure case for ftp_delete.”

Exam tip

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

Example

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

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

Short notes

Defftp_delete() — Priya uses it for a ftp_delete dry-run in lab hour.
Ruleftp_delete() → one ftp_delete step Priya can write from memory.
Rememberftp_delete() + the PHP runtime (lab hour).
Useftp_delete() in lab hour (a ftp_delete dry-run).
Trapftp_delete() — skipping the failure case for ftp_delete.
Exftp_delete() → a ftp_delete dry-run.

PHP · Theory

ftp_delete()

← All stacks

Theory

300/352

ftp_delete()

Priya only reaches for ftp_delete() when a ftp_delete dry-run has to stay correct in lab hour.

For ftp_delete(), the PHP runtime is in play. Don’t blame it until you have traced a ftp_delete dry-run.

ftp_delete() exists so Priya can keep a ftp_delete dry-run correct in lab hour.

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

ftp_delete() trap — skipping the failure case for ftp_delete. Priya loses marks for that every viva.

After ftp_delete(), Priya should still remember skipping the failure case for ftp_delete.

Close ftp_delete() with: “If I skip it, a ftp_delete dry-run goes wrong like this: skipping the failure case for ftp_delete.”

Exam tip

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

Example

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

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

Short notes

Defftp_delete() — Priya uses it for a ftp_delete dry-run in lab hour.
Ruleftp_delete() → one ftp_delete step Priya can write from memory.
Rememberftp_delete() + the PHP runtime (lab hour).
Useftp_delete() in lab hour (a ftp_delete dry-run).
Trapftp_delete() — skipping the failure case for ftp_delete.
Exftp_delete() → a ftp_delete dry-run.

ftp_delete()

Example

Short notes

Questions

ftp_delete()

Example

Short notes

Questions