PHP 7 Operators with Example

This tutorial will describe PHP 7 operators with example. The Operators help to perform operations on variables and values.

There are some new operators introduced into php 7, like the null coalescing operator (??), spaceship operator(<=>).

Here, We will discuss all php7 operators with examples. We will go through one by one operator types in PHP 7. There are the following operator groups available in PHP 7.

• Arithmetic operators
• Assignment operators
• Comparison operators
• Increment/Decrement operators
• Logical operators
• String operators
• Array operators
• Conditional assignment operators
• Spaceship operators

PHP Arithmetic Operators

These methods help to do some common arithmetical operations onto the variables. You can do addition, subtraction, multiplication, etc. between two variables.

PHP 7 Arithmetic Operators Example

<?php 
$x = 20; $y = 8; 
echo($x + $y); // 0utput: 28 
echo($x - $y); // 0utput: 12 
echo($x * $y); // 0utput: 160 
echo($x / $y); // 0utput: 2.5 
echo($x % $y); // 0utput: 4 
?> 

PHP 7 Assignment Operators

This type php 7 operator are used to assign values to variables.The left operands gets set to the value of the assignment expression on the right.

PHP 7 Assignment Operators Example

<?php
$x = 20;
echo $x; // Outputs: 20

$x += 30;
echo $x; // Outputs: 50

$x -= 20;
echo $x; // Outputs: 30
 
$x *= 5;
echo $x; // Outputs: 150
 
$x /= 10;
echo $x; // Outputs: 15
 
$x %= 15;
echo $x; // Outputs: 1
?>

PHP Comparison Operators

The PHP 7 Comparison Operators help to compare two variables. You can also compare two different types of variables as well.

PHP 7 comparison Operators Example

<?php
$x = 5;
$y = 15;
$z = "5";
var_dump($x == $z);  // Outputs: boolean true
var_dump($x === $z); // Outputs: boolean false
var_dump($x < $y);   // Outputs: boolean true
var_dump($x <= $y);  // Outputs: boolean true
?>

PHP 7 Increment / Decrement Operators

The PHP 7 increment operators are used to increment a variable’s value whereas Decrement Operators used to decrement a variable’s value.

PHP 7 Incrementing and Decrementing Operators Example

<?php
$x = 10;
echo ++$x; // Outputs: 11
echo $x;   // Outputs: 11

echo $x++; // Outputs: 11
echo $x;   // Outputs: 12

echo --$x; // Outputs: 11
echo $x;   // Outputs: 11
 
echo $x--; // Outputs: 11
echo $x;   // Outputs: 9
?>

PHP 7 Logical Operators

The PHP 7 logical operators are used to combine two conditions. You can combine two variable conditions using logical operators.

PHP 7 Logical Operators Example

<?php
$x = 10;
$y = 20 
if($x < $y && ($y% $x == 0)) {
 echo "factored number";
} else {
echo "not factored number";
}
?>

PHP 7 String Operators

There are the following operators for string manipulation.Its specially designed for string types variables.

PHP 7 String Operators Example

<?php
$x = "Hello";
$y = " PHPflow!";
echo $x . $y; // Outputs: Hello PHPflow!
 
$x .= $y;
echo $x; // Outputs: Hello PHPflow!
?>

PHP 7 Array Operators

PHP 7 also provides operators for array type variables, you can compare two arrays using the following array operators.

PHP 7 String Operators Example

$a = array("a" => "Car", "b" => "Bus", "c" => "Truck");
$b = array("u" => "Auto", "v" => "Train", "w" => "Metro");
$c = $a + $b; // Union of $x and $y
var_dump($c);
var_dump($a == $b);   // Outputs: boolean false
var_dump($a === $b);  // Outputs: boolean false
var_dump($a != $b);   // Outputs: boolean true
var_dump($a <> $b);   // Outputs: boolean true
var_dump($a !== $b);  // Outputs: boolean true

PHP 7 Conditional Assignment Operators

PHP provides some conditional statements for value assignment of a variable. These conditional assignment operators are used to set a value depending on conditions.

PHP 7 Conditional Assignment Operators Example

// if a is not passed
$a = $a ?? 0;// result 0;

PHP 7 Spaceship Operator

These operators are introduced into PHP 7. The operand (<=>) is used for comparing two expressions. This is a three-way comparison operator and it can perform greater than, less than, and equal comparisons between two operands.

The spaceship operator returns 0 if both operands are equal, 1 if the left is greater, and -1 if the right is greater.

PHP 7 Spaceship Operator Example

echo 10 <=> 10; // outputs 0
echo 30 <=> 40; // outputs -1
echo 40 <=> 30; // outputs 1