point.comPHP Operators
Operators function as symbols that execute operations on variables and values.
PHP operators function in arithmetic calculations and enable comparisons, logical decisions and variable assignments among other operations.
Arithmetic Operators
Used to perform basic mathematical operations.
| Operator | Name | Example | Result |
|---|---|---|---|
| + | Addition | $x + $y | Sum |
| - | Subtraction | $x - $y | Difference |
| * | Multiplication | $x * $y | Product |
| / | Division | $x / $y | Quotient |
| % | Modulus | $x % $y | Remainder |
| ** | Exponentiation | $x ** $y | Power |
Assignment Operators
Used to assign values to variables.
| Operator | Description | Example |
|---|---|---|
| = | Assign | $x = 5; |
| += | Add and assign | $x += 5; |
| -= | Subtract and assign | $x -= 2; |
| *= | Multiply and assign | $x *= 3; |
| /= | Divide and assign | $x /= 2; |
| %= | Modulus and assign | $x %= 3; |
Comparison Operators
Used to compare values.
| Operator | Description | Example | Result |
|---|---|---|---|
| == | Equal | $x == $y | true/false |
| === | Identical (value + type) | $x === $y | true/false |
| != | Not equal | $x != $y | true/false |
| !== | Not identical | $x !== $y | true/false |
| > | Greater than | $x > $y | true/false |
| < | Less than $x < $y | true/false | |
| >= | Greater than or equal to | $x >= $y | true/false |
| <= | Less than or equal to | $x <= $y | true/false |
Example
<?php
$x = 10;
$y = 5;
// Arithmetic
echo "Sum: " . ($x + $y) . "<br>";
// Assignment
$x += 5;
echo "After += : $x<br>";
// Comparison
echo ($x == $y) ? "Equal<br>" : "Not equal<br>";
// Logical
if ($x > 0 && $y > 0) {
echo "Both positive<br>";
}
// String
$greeting = "Hello, ";
$name = "Alice";
echo $greeting . $name . "<br>";
?>
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