PHP Operators

Here's a definition, example, and clarification for some common PHP operators:

Arithmetic operators perform basic mathematical operations.

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$a = 10;
$b = 5;
$sum = $a + $b; // Addition
$difference = $a - $b; // Subtraction
$product = $a * $b; // Multiplication
$quotient = $a / $b; // Division
$remainder = $a % $b; // Modulus
 

• These operators allow you to perform addition, subtraction, multiplication, division, and find the remainder of division (modulus) between two numbers.

Assignment operators assign values to variables.

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$x = 5; // Assignment
$y += 3; // Addition assignment ($y = $y + 3)
$z -= 2; // Subtraction assignment ($z = $z - 2)
 

• Clarification: Assignment operators are used to set values to variables and can also update variables with new values based on existing values.

Comparison operators compare two values and return a Boolean (true or false) result.

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$a = 10;
$b = 5;
$isEqual = ($a == $b); // Equal
$isNotEqual = ($a != $b); // Not equal
$isGreaterThan = ($a > $b); // Greater than
$isLessThan = ($a < $b); // Less than
 

• These operators allow you to compare values and make decisions based on the comparison results. They are often used in conditional statements.

Logical operators perform logical operations on Boolean values.

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$isTrue = true;
$isFalse = false;
$andResult = ($isTrue && $isFalse); // Logical AND
$orResult = ($isTrue || $isFalse); // Logical OR
$notResult = !$isTrue; // Logical NOT
 

• Clarification: Logical operators are used to combine and manipulate Boolean values, making them useful for creating complex conditions.

The dot . operator is used to concatenate (join) strings.

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$firstName = "John";
$lastName = "Doe";
$fullName = $firstName . " " . $lastName;
 

• You can use the dot operator to combine strings together, creating a new string.

These are some of the fundamental PHP operators. Understanding and using these operators effectively is essential for performing various operations and calculations in PHP scripts.