PHP · Theory

pi()

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Theory

315/352

pi()

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

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

pi() exists so Meera can keep pi on Meera's board correct in a small live site.

Meera ships pi() in a small live site. That is the use case worth saying.

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

After pi(), Meera should still remember only reciting the name of pi.

Close pi() with — “If I skip it, pi on Meera's board goes wrong like this: only reciting the name of pi.”

Exam tip

Say pi() in one breath, then one pi step Meera can write from memory, then only reciting the name of pi.

Example

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

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

Short notes

Defpi() — Meera uses it for pi on Meera's board in a small live site.
Rulepi() → one pi step Meera can write from memory.
Rememberpi() + Apache/Nginx (a small live site).
Usepi() in a small live site (pi on Meera's board).
Trappi() — only reciting the name of pi.
Expi() → pi on Meera's board.

PHP · Theory

pi()

← All stacks

Theory

315/352

pi()

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

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

pi() exists so Meera can keep pi on Meera's board correct in a small live site.

Meera ships pi() in a small live site. That is the use case worth saying.

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

After pi(), Meera should still remember only reciting the name of pi.

Close pi() with — “If I skip it, pi on Meera's board goes wrong like this: only reciting the name of pi.”

Exam tip

Say pi() in one breath, then one pi step Meera can write from memory, then only reciting the name of pi.

Example

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

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

Short notes

Defpi() — Meera uses it for pi on Meera's board in a small live site.
Rulepi() → one pi step Meera can write from memory.
Rememberpi() + Apache/Nginx (a small live site).
Usepi() in a small live site (pi on Meera's board).
Trappi() — only reciting the name of pi.
Expi() → pi on Meera's board.

pi()

Example

Short notes

Questions

pi()

Example

Short notes

Questions