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PHP · Theory

Array sizeof()

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Theory

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Array sizeof()

Array sizeof() (function) sits in a small live site. Arun’s job is Array sizeof function on Arun's board. Write that first.

For Array sizeof() (function), a .php page is in play. Don’t blame it until you have traced Array sizeof function on Arun's board.

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

Arun ships Array sizeof() (function) in a small live site. That is the use case worth saying.

If Array sizeof function on Arun's board breaks under Array sizeof() (function), check skipping the failure case for Array sizeof function first.

After Array sizeof() (function), Arun should still remember skipping the failure case for Array sizeof function.

Viva for Array sizeof() (function): what it is → one Array sizeof function step Arun can write from memory → the mistake (skipping the failure case for Array sizeof function).

Exam tip

For Array sizeof() (function): definition + a small live site + one failure.

Example

<?php
$langs = ["PHP", "JS", "SQL"];
$langs[] = "Python";
foreach ($langs as $i => $lang) {
  echo "$i: $lang\n";
}

Array sizeof() — pHP arrays are ordered maps. foreach walks key and value.

Short notes

  • DefArray sizeof() (function) — Arun uses it for Array sizeof function on Arun's board in a small live site.
  • RuleArray sizeof() (function) → one Array sizeof function step Arun can write from memory.
  • RememberArray sizeof() (function) + a .php page (a small live site).
  • UseArray sizeof() (function) in a small live site (Array sizeof function on Arun's board).
  • TrapArray sizeof() (function) — skipping the failure case for Array sizeof function.
  • ExArray sizeof() (function) → Array sizeof function on Arun's board.

Questions

1

Define Array sizeof() (function) without jargon. Then point at Array sizeof function on Arun's board.

2

Where does Array sizeof() (function) show up in a small live site?

3

What trap does Arun hit with Array sizeof() (function)?

4

Write the smallest Array sizeof() (function) step on Array sizeof function on Arun's board. What happens?

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