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PHP · Theory

Array pos()

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Theory

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Array pos()

Array pos() (function) sits in a campus project. Arun’s job is Arun walking through Array pos function. Write that first.

For Array pos() (function), the PHP runtime is in play. Don’t blame it until you have traced Arun walking through Array pos function.

Without Array pos() (function), a campus project gets messy and Arun walking through Array pos function is hard to trust.

Arun ships Array pos() (function) in a campus project. That is the use case worth saying.

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

After Array pos() (function), Arun should still remember only reciting the name of Array pos function.

Close Array pos() (function) with: “If I skip it, Arun walking through Array pos function goes wrong like this: only reciting the name of Array pos function.”

Exam tip

Board: Arun walking through Array pos function. Dry-run Array pos() (function). Name the trap: only reciting the name of Array pos function.

Example

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

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

Short notes

  • DefArray pos() (function) — Arun uses it for Arun walking through Array pos function in a campus project.
  • RuleArray pos() (function) → one Array pos function step Arun can write from memory.
  • RememberArray pos() (function) + the PHP runtime (a campus project).
  • UseArray pos() (function) in a campus project (Arun walking through Array pos function).
  • TrapArray pos() (function) — only reciting the name of Array pos function.
  • ExArray pos() (function) → Arun walking through Array pos function.

Questions

1

Define Array pos() (function) without jargon. Then point at Arun walking through Array pos function.

2

Where does Array pos() (function) show up in a campus project?

3

How do you catch only reciting the name of Array pos function?

4

Change one input on Arun walking through Array pos function. Predict the new result.

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