PHP Assignment Operators

Last update on August 19 2022 21:50:39 (UTC/GMT +8 hours)

Description

Assignment operators allow writing a value to a variable. The first operand must be a variable and the basic assignment operator is "=". The value of an assignment expression is the final value assigned to the variable. In addition to the regular assignment operator "=", several other assignment operators are composites of an operator followed by an equal sign.

Interestingly all five arithmetic operators have corresponding assignment operators, Here is the list.

The following table discussed more details of the said assignment operators.

Shorthand	Expression	Description
$a+= $b	$a = $a + $b	Adds 2 numbers and assigns the result to the first.
$a-= $b	$a = $a -$b	Subtracts 2 numbers and assigns the result to the first.
$a*= $b	$a = $a*$b	Multiplies 2 numbers and assigns the result to the first.
$a/= $b	$a = $a/$b	Divides 2 numbers and assigns the result to the first.
$a%= $b	$a = $a%$b	Computes the modulus of 2 numbers and assigns the result to the first.

Example:

<?php
$x1=100;
$x2=200;
$x3=300;
$x4=400;
$x5=500;
$x1+= 100;
echo " $x1 <br />";
$x2-= 200;
echo " $x2 <br />";
$x3*= 300;
echo " $x3 <br />";
$x4/= 400;
echo " $x4 <br />";
$x5%= 500;
echo " $x5 <br />";
$x=($y=11)+9;
echo " Value of x & y is :  $x  $y <br />";
?>

Output:

200
0
90000
1
0
Value of x & y is : 20 11

View the example in the browser

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