Skill Topic · Cinematic

PHP Type Declarations — Types Ko Enforce Karna

Version: v2.0.0 | Modified: 2026-03-25 PHP ek dynamically typed language hai — matlab tumhe…

Overview

PHP Type Declarations — Types Ko Enforce Karna — Quick Facts

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`) se separate karke. `int: string` ka matlab hai "is…

Topic 1

Type Declarations Kya Hain?

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PHP 5: Sirf class/interface type…

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PHP 7.0: Scalar types (int, float,…

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PHP 7.1: Nullable (?type), void,…

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PHP 7.4: Typed properties (class…

Topic 2

Parameter Type Declarations

💡 Sabse pehle aur sabse common use hai parameters par type lagana. Jab tum function banate…

Topic 3

Return Type Declarations

🎯 Function ka return type declare karna equally important hai. Return type se tumhe aur…

Topic 4

Nullable Types — `?type`

⭐ Real-world me aksar aisa hota hai ke ek function ko value bhi mil sakti hai aur null bhi.…

Topic 5

Union Types (PHP 8.0+)

🔑 Nullable types sirf "type ya null" allow karte hain. Lekin agar tumhe "int ya string"…

Topic 6

Intersection Types (PHP 8.1+)

✨ Union types me "ya" ka concept tha — int YA string. Intersection types me "aur" ka…

Topic 7

Strict Mode — `declare(strict_types=1)`

🌟 Yeh ek bahut important setting hai jo PHP ka type checking behavior fundamentally change…

Topic 8

Typed Properties (PHP 7.4+)

🚀 PHP 7.4 se pehle class properties par type enforce karne ka koi proper tareeqa nahi tha.…

Topic 9

Constructor Promotion (PHP 8.0+)

📚 Pehle PHP me class properties declare karna aur phir constructor me unhe assign karna…

Topic 10

Special Types — mixed, never, self, static

💡 PHP me kuch special types hain jo regular scalar types se alag hain. mixed (PHP 8.0+) ka…

Topic 11

All Types Reference Table

🎯 Yeh table PHP ke saare available types ka quick reference hai. Har type ke saath uska PHP…

Topic 12

Summary

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Parameter types: function f(int…

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Return types: function f(): int —…

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Nullable: ?string = string ya null…

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Union: int|string = int ya string…

Quick Quiz

Quiz — Question 1

PHP Type Declarations — Types Ko Enforce Karna ka sabse sahi definition kya hai?

Complete! 🎉

PHP Type Declarations — Types Ko Enforce Karna Complete!

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