PHP · Theory

md5_files()

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Theory

209/352

md5_files()

Amit only reaches for md5_files() when md5_files on Amit's board has to stay correct in a small live site.

Keep md5_files() small. Amit should finish md5_files on Amit's board in a few lines, not a 40-line dump.

Skip md5_files() and skipping the failure case for md5_files shows up in a small live site.

md5_files() shows up in a small live site. Name md5_files on Amit's board, not “a real-world scenario”.

Don’t do this with md5_files() — skipping the failure case for md5_files. Interviewers spot it in ten seconds.

After md5_files(), Amit should still remember skipping the failure case for md5_files.

One breath for md5_files(), then md5_files on Amit's board, then skipping the failure case for md5_files. Sit down.

Exam tip

Say md5_files() in one breath, then one md5_files step Amit can write from memory, then skipping the failure case for md5_files.

Example

<?php
// md5_files()
$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";
}

md5_files(): scores array, print avg, then high marks. Say the output.

Short notes

Defmd5_files() — Amit uses it for md5_files on Amit's board in a small live site.
Rulemd5_files() → one md5_files step Amit can write from memory.
Remembermd5_files() + the PHP runtime (a small live site).
Usemd5_files() in a small live site (md5_files on Amit's board).
Trapmd5_files() — skipping the failure case for md5_files.
Exmd5_files() → md5_files on Amit's board.

PHP · Theory

md5_files()

← All stacks

Theory

209/352

md5_files()

Amit only reaches for md5_files() when md5_files on Amit's board has to stay correct in a small live site.

Keep md5_files() small. Amit should finish md5_files on Amit's board in a few lines, not a 40-line dump.

Skip md5_files() and skipping the failure case for md5_files shows up in a small live site.

md5_files() shows up in a small live site. Name md5_files on Amit's board, not “a real-world scenario”.

Don’t do this with md5_files() — skipping the failure case for md5_files. Interviewers spot it in ten seconds.

After md5_files(), Amit should still remember skipping the failure case for md5_files.

One breath for md5_files(), then md5_files on Amit's board, then skipping the failure case for md5_files. Sit down.

Exam tip

Say md5_files() in one breath, then one md5_files step Amit can write from memory, then skipping the failure case for md5_files.

Example

<?php
// md5_files()
$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";
}

md5_files(): scores array, print avg, then high marks. Say the output.

Short notes

Defmd5_files() — Amit uses it for md5_files on Amit's board in a small live site.
Rulemd5_files() → one md5_files step Amit can write from memory.
Remembermd5_files() + the PHP runtime (a small live site).
Usemd5_files() in a small live site (md5_files on Amit's board).
Trapmd5_files() — skipping the failure case for md5_files.
Exmd5_files() → md5_files on Amit's board.

md5_files()

Example

Short notes

Questions

md5_files()

Example

Short notes

Questions