Operators
Perform operations using arithmetic, comparison, and logical operators.
Operators is a free PHP Academy lesson on CoddyKit — lesson 3 of 5. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the PHP Academy learning path, one of 5 lessons in the course, and your progress syncs across the web and the CoddyKit app.
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Operators
Welcome to the next step in PHP! In this lesson, you’ll learn about operators, which are used to perform operations on variables and values. Let’s dive in!
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What Are Operators?
Operators are symbols or keywords used to perform operations on variables and values. They help you calculate, compare, and manipulate data in your PHP scripts.
Key Point: PHP provides several categories of operators, including arithmetic, assignment, comparison, logical, and more.
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Arithmetic Operators
Arithmetic operators are used for basic mathematical operations:
+: Addition-: Subtraction*: Multiplication/: Division%: Modulus (remainder)
Example:
<?php
$a = 10;
$b = 3;
echo $a + $b; // Outputs: 13
echo $a % $b; // Outputs: 1
?>
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Assignment Operators
Assignment operators assign values to variables. The most common is =, but there are others:
+=: Add and assign-=: Subtract and assign*=: Multiply and assign/=: Divide and assign
Example:
<?php
$x = 5;
$x += 3; // $x is now 8
echo $x;
?>
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Comparison Operators
Comparison operators compare two values and return true or false. Examples:
==: Equal!=: Not equal===: Identical (equal and same type)<: Less than>: Greater than
Example:
<?php
$a = 10;
$b = "10";
echo $a == $b; // Outputs: 1 (true)
echo $a === $b; // Outputs: (false)
?>
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Logical Operators
Logical operators combine multiple conditions. Examples:
&&: Logical AND||: Logical OR!: Logical NOT
Example:
<?php
$x = true;
$y = false;
echo $x && $y; // Outputs: (false)
echo $x || $y; // Outputs: 1 (true)
?>
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Increment and Decrement Operators
These operators increase or decrease the value of a variable by 1:
++: Increment--: Decrement
Example:
<?php
$count = 5;
echo ++$count; // Outputs: 6
echo $count--; // Outputs: 6, but $count is now 5
?>
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String Operators
PHP provides two operators for working with strings:
.: Concatenation (joins two strings).=: Concatenation and assignment
Example:
<?php
$greeting = "Hello";
$greeting .= ", World!";
echo $greeting; // Outputs: Hello, World!
?>
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<?php
$a = 10;
$b = 20;
echo ($a > $b) ? "A is greater" : "B is greater";
?>
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Great Job!
Congratulations! You’ve learned about PHP operators, including arithmetic, assignment, comparison, logical, and more. These tools are crucial for performing operations in your scripts. In the next lesson, we’ll explore control structures like if-else and loops. Let’s keep coding!
Frequently asked questions
Is the “Operators” lesson free?
Yes — the full text of “Operators” is free to read here on the web, and the PHP Academy course includes 5 lessons in total. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the PHP Academy course, upgrade to CoddyKit PRO.
What will I learn in “Operators”?
Perform operations using arithmetic, comparison, and logical operators. You practise PHP Academy with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.
Do I need any experience to start PHP Academy?
No prior experience is required. PHP Academy on CoddyKit is structured for beginners through advanced learners; this is — lesson 3 of 5, so you can start here or from the beginning and move at your own pace.
How long does the “Operators” lesson take?
Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.
Can I write and run code in this PHP Academy lesson?
Yes. Every PHP Academy lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.