PHP · Theory

Math Functions

Theory

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Isha only reaches for Math Functions when Math Functions on Isha's board has to stay correct in a small live site.

Do Math Functions once by hand. one Math Functions step Isha can write from memory. Change one input. Say the new result out loud.

Math Functions exists so Isha can keep Math Functions on Isha's board correct in a small live site.

Isha ships Math Functions in a small live site. That is the use case worth saying.

Math Functions trap — copy-pasting Math Functions without a dry-run. Isha loses marks for that every viva.

Math Functions is not a lonely heading. Isha ties it to Math Functions on Isha's board.

One breath for Math Functions, then Math Functions on Isha's board, then copy-pasting Math Functions without a dry-run. Sit down.

Exam tip

For Math Functions: definition + a small live site + one failure.

<?php
function greet(string $name, int $n = 1): string {
  return str_repeat("Hi $name! ", $n);
}
echo greet("Asha");
echo greet("Dev", 2);

Math Functions — typed params and return types make PHP APIs clearer.

DefMath Functions — Isha uses it for Math Functions on Isha's board in a small live site.
RuleMath Functions → one Math Functions step Isha can write from memory.
RememberMath Functions + Apache/Nginx (a small live site).
UseMath Functions in a small live site (Math Functions on Isha's board).
TrapMath Functions — copy-pasting Math Functions without a dry-run.
ExMath Functions → Math Functions on Isha's board.