PHP if Statements
⭐ PHP if Statements
In PHP if Statements is used to execute a block of code only if a condition is true.
1. Basic if Statement
Syntax:
Example:
2. if…else Statement
Runs different code if the condition is true or false.
Syntax:
Example:
3. if…elseif…else Statement
Use it when you have multiple conditions.
Syntax:
Example:
4. Nested if Statements
An if inside another if.
Example:
5. Shorthand if (Ternary Operator)
Syntax:
Example:
6. Null Coalescing Operator (??)
Useful to check if a variable exists.
7. Alternate Syntax for HTML Code
Useful for PHP inside HTML templates.
📘 Examples for Practice
Example 1: Check Number is Positive or Negative
Example 2: Check Even or Odd
🎯 Summary
| Statement | Purpose |
|---|---|
| if | Run code only if condition is true |
| if…else | Choose between 2 blocks |
| if…elseif…else | Multiple conditions |
| Nested if | One if inside another |
| Ternary | Short if…else |
| ?? | Check undefined/null variable |
If you want, I can continue with the next topic:
👉 PHP Switch Case
👉 PHP Loops
👉 PHP Arrays
👉 PHP Functions
