PHP Operators

Certainly! PHP operators are used to perform operations on variables and values. Operators can be categorized into various types. Below are some of the most common types of operators in PHP, along with examples:

Arithmetic Operators

These are used for performing arithmetic operations:

• Addition (`+`): Adds two numbers together.
• Subtraction (`-`): Subtracts the right-hand operand from the left-hand operand.
• Multiplication (`*`): Multiplies two numbers.
• Division (`/`): Divides the left-hand operand by the right-hand operand.
• Modulus (`%`): Returns the remainder of the division of the left-hand operand by the right-hand operand.

$a = 10;
$b = 20;

echo $a + $b; // Output: 30
echo $a - $b; // Output: -10
echo $a * $b; // Output: 200
echo $a / $b; // Output: 0.5
echo $a % $b; // Output: 10

Assignment Operators

These are used to assign values to variables.

• `=`: Assigns the value of the right-hand operand to the left-hand operand.
• `+=`: Adds the right-hand operand to the left-hand operand and assigns the result to the left-hand operand.
• `-=`: Subtracts the right-hand operand from the left-hand operand and assigns the result to the left-hand operand.

$a = 10;
$b = 20;

$a += $b; // Same as $a = $a + $b; Now $a is 30
$a -= $b; // Same as $a = $a - $b; Now $a is 10 again

Comparison Operators

These are used to compare two values:

• `==`: Equal to
• `===`: Identical (equal and of the same type)
• `!=`: Not equal
• `!==`: Not identical
• `<`: Less than
• `>`: Greater than
• `<=`: Less than or equal to
• `>=`: Greater than or equal to

$a = 10;
$b = '10';

var_dump($a == $b);  // Output: bool(true)
var_dump($a === $b); // Output: bool(false)

Logical Operators

• `and` / `&&`: Logical AND
• `or` / `||`: Logical OR
• `!`: Logical NOT
• `xor`: Logical XOR (exclusive or)

$a = true;
$b = false;

var_dump($a and $b); // Output: bool(false)
var_dump($a || $b);  // Output: bool(true)
var_dump(!$a);       // Output: bool(false)

Concatenation Operator

• `.`: Concatenates two strings together.

$str1 = "Hello, ";
$str2 = "World!";
echo $str1 . $str2; // Output: Hello, World!

These are some of the most commonly used operators in PHP. You can mix and match them to perform complex operations as per your requirements.