Skill Topic · Cinematic

PHP Constants — Constants Kya Hain?

Version: v2.0.0 | Modified: 2026-03-25

Overview

PHP Constants — Constants Kya Hain? — Quick Facts

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Feature: Variable

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Syntax: $name = "Ali"

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$ sign: Chahiye

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Value change: Ho sakti hai

Topic 1

Constant Kya Hai?

🤖 Constant ek aisi value hai jo ek baar set ho jaaye to phir change nahi hoti. Variables se…

Topic 2

Constant Banane Ke 2 Tareeqe

🧠 1) define() Function define() ek runtime function hai — matlab yeh code execute hone ke…

Topic 3

Naming Rules

💡 Constants ke naam ke liye convention UPPERCASE_WITH_UNDERSCORES hai. Technically…

Topic 4

Array Constants

⚡ PHP 7+ me constants me arrays bhi store kar sakte ho: `php <?php define("COLORS", ["Red",…

Topic 5

Constants Are Automatically Global

🎯 Variables ke liye function ke andar global keyword chahiye, lekin constants ko kahi se…

Topic 6

Check Constant Exists

🔮 defined() function check karta hai ke koi constant exist karta hai ya nahi. constant()…

Topic 7

PHP Built-in Constants

🌐 PHP me bahut saari pre-defined constants available hain jo system ki information deti…

Topic 8

Practical Example: App Configuration

📊 Real applications me constants ka common use configuration values store karna hai: `php…

Topic 9

Summary

🤖 | Point | Detail | |-------|--------| | Constant | Fixed value — ek baar set, phir change…

Quick Quiz

Quiz — Question 1

PHP Constants — Constants Kya Hain? ka sabse sahi definition kya hai?

Quick Quiz

Quiz — Question 2

PHP Constants — Constants Kya Hain? ka 'Syntax' kya hai?

Complete! 🎉

PHP Constants — Constants Kya Hain? Complete!

Aliens School · HIEN · Cinematic Knowledge

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