PHP · Theory

str_replace()

Theory

234/352

str_replace()

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

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

Skip str_replace() and copy-pasting str_replace without a dry-run shows up in a small live site.

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

If str_replace on Priya's board breaks under str_replace(), check copy-pasting str_replace without a dry-run first.

After str_replace(), Priya should still remember copy-pasting str_replace without a dry-run.

Close str_replace() with: “If I skip it, str_replace on Priya's board goes wrong like this: copy-pasting str_replace without a dry-run.”

Exam tip

Say str_replace() in one breath, then one str_replace step Priya can write from memory, then copy-pasting str_replace without a dry-run.

Example

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

Short notes

Defstr_replace() — Priya uses it for str_replace on Priya's board in a small live site.
Rulestr_replace() → one str_replace step Priya can write from memory.
Rememberstr_replace() + Apache/Nginx (a small live site).
Usestr_replace() in a small live site (str_replace on Priya's board).
Trapstr_replace() — copy-pasting str_replace without a dry-run.
Exstr_replace() → str_replace on Priya's board.

PHP · Theory

str_replace()

← All stacks

Theory

234/352

str_replace()

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

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

Skip str_replace() and copy-pasting str_replace without a dry-run shows up in a small live site.

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

If str_replace on Priya's board breaks under str_replace(), check copy-pasting str_replace without a dry-run first.

After str_replace(), Priya should still remember copy-pasting str_replace without a dry-run.

Close str_replace() with: “If I skip it, str_replace on Priya's board goes wrong like this: copy-pasting str_replace without a dry-run.”

Exam tip

Say str_replace() in one breath, then one str_replace step Priya can write from memory, then copy-pasting str_replace without a dry-run.

Example

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

Short notes

Defstr_replace() — Priya uses it for str_replace on Priya's board in a small live site.
Rulestr_replace() → one str_replace step Priya can write from memory.
Rememberstr_replace() + Apache/Nginx (a small live site).
Usestr_replace() in a small live site (str_replace on Priya's board).
Trapstr_replace() — copy-pasting str_replace without a dry-run.
Exstr_replace() → str_replace on Priya's board.

str_replace()

Example

Short notes

Questions

str_replace()

Example

Short notes

Questions