Lesson 8: PHP Operators
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Lesson 8: PHP Operators
When learning PHP, understanding operators is essential. Operators are symbols used to perform operations on variables and values. This guide covers all major types of operators in PHP.
What Are PHP Operators?
Operators are special characters that perform specific operations like math, comparison, assignment, and logic on variables.
Types of Operators in PHP
1. Arithmetic Operators
Used for basic mathematical calculations.
| Operator | Description | Example |
|---|---|---|
+ | Addition | $a + $b |
- | Subtraction | $a - $b |
* | Multiplication | $a * $b |
/ | Division | $a / $b |
% | Modulus | $a % $b |
2. Comparison Operators
Used to compare two values.
| Operator | Description | Example |
|---|---|---|
== | Equal | $a == $b |
=== | Identical (value and type) | $a === $b |
!= | Not equal | $a != $b |
<> | Not equal | $a <> $b |
> | Greater than | $a > $b |
< | Less than | $a < $b |
>= | Greater than or equal | $a >= $b |
<= | Less than or equal | $a <= $b |
3. Logical Operators
Used for combining multiple conditions.
| Operator | Description | Example |
|---|---|---|
&& | AND | $a && $b |
| ` | ` | |
! | NOT | !$a |
4. Assignment Operators
Used to assign values to variables.
| Operator | Description | Example |
|---|---|---|
= | Assignment | $a = 5 |
+= | Add and assign | $a += 2 |
-= | Subtract and assign | $a -= 2 |
*= | Multiply and assign | $a *= 2 |
/= | Divide and assign | $a /= 2 |
%= | Modulus and assign | $a %= 2 |
Why Are Operators Important?
Operators simplify tasks and improve code readability. They are key in decision-making and data manipulation. Without them, writing efficient code becomes difficult.
Conclusion
Mastering PHP operators gives you better control over your code. It’s a vital step in becoming a professional web developer. Practice regularly for better understanding.
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