PHP · Theory

String Functions

Theory

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If you can teach String Functions using a String Functions dry-run, you know it. If you only know the heading, you don’t.

For String Functions, a .php page is in play. Don’t blame it until you have traced a String Functions dry-run.

String Functions exists so Zara can keep a String Functions dry-run correct in a small live site.

String Functions shows up in a small live site. Name a String Functions dry-run, not “a real-world scenario”.

String Functions trap — skipping the failure case for String Functions. Zara loses marks for that every viva.

After String Functions, Zara should still remember skipping the failure case for String Functions.

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

Exam tip

Board: a String Functions dry-run. Dry-run String Functions. Name the trap: skipping the failure case for String Functions.

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

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

DefString Functions — Zara uses it for a String Functions dry-run in a small live site.
RuleString Functions → one String Functions step Zara can write from memory.
RememberString Functions + a .php page (a small live site).
UseString Functions in a small live site (a String Functions dry-run).
TrapString Functions — skipping the failure case for String Functions.
ExString Functions → a String Functions dry-run.