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PHP · Theory

Classes and Objects

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Theory

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Classes and Objects

Classes and Objects is a PHP idea you prove with Classes and Objects on Dev's board, not with a slogan.

Keep Classes and Objects small. Dev should finish Classes and Objects on Dev's board in a few lines, not a 40-line dump.

Classes and Objects exists so Dev can keep Classes and Objects on Dev's board correct in a campus project.

Dev ships Classes and Objects in a campus project. That is the use case worth saying.

Classes and Objects miss — only reciting the name of Classes and Objects. Fix it before you talk about advanced PHP.

Classes and Objects is not a lonely heading. Dev ties it to Classes and Objects on Dev's board.

One breath for Classes and Objects, then Classes and Objects on Dev's board, then only reciting the name of Classes and Objects. Sit down.

Exam tip

For Classes and Objects: definition + a campus project + one failure.

Example

<?php
class User {
  public function __construct(private string $name) {}
  public function hello(): string {
    return "Hello, {$this->name}";
  }
}
echo (new User("Ravi"))->hello();

Classes and Objects — constructor property promotion keeps simple classes short.

Short notes

  • DefClasses and Objects — Dev uses it for Classes and Objects on Dev's board in a campus project.
  • RuleClasses and Objects → one Classes and Objects step Dev can write from memory.
  • RememberClasses and Objects + the PHP runtime (a campus project).
  • UseClasses and Objects in a campus project (Classes and Objects on Dev's board).
  • TrapClasses and Objects — only reciting the name of Classes and Objects.
  • ExClasses and Objects → Classes and Objects on Dev's board.

Questions

1

Define Classes and Objects without jargon. Then point at Classes and Objects on Dev's board.

2

Name one PHP screen/job that needs Classes and Objects.

3

What trap does Dev hit with Classes and Objects?

4

Change one input on Classes and Objects on Dev's board. Predict the new result.

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