PHP - Assignment Operators Examples

You can use assignment operators in PHP to assign values to variables. Assignment operators are shorthand notations to perform arithmetic or other operations while assigning a value to a variable. For instance, the "=" operator assigns the value on the right-hand side to the variable on the left-hand side.

Additionally, there are compound assignment operators like +=, -= , *=, /=, and %= which combine arithmetic operations with assignment. For example, "$x += 5" is a shorthand for "$x = $x + 5", incrementing the value of $x by 5. Assignment operators offer a concise way to update variables based on their current values.

The following table highligts the assignment operators that are supported by PHP −

Operator	Description	Example
=	Simple assignment operator. Assigns values from right side operands to left side operand	C = A + B will assign value of A + B into C
+=	Add AND assignment operator. It adds right operand to the left operand and assign the result to left operand	C += A is equivalent to C = C + A
-=	Subtract AND assignment operator. It subtracts right operand from the left operand and assign the result to left operand	C -= A is equivalent to C = C - A
*=	Multiply AND assignment operator. It multiplies right operand with the left operand and assign the result to left operand	C = A is equivalent to C = C A
/=	Divide AND assignment operator. It divides left operand with the right operand and assign the result to left operand	C /= A is equivalent to C = C / A
%=	Modulus AND assignment operator. It takes modulus using two operands and assign the result to left operand	C %= A is equivalent to C = C % A

Example

The following example shows how you can use these assignment operators in PHP −

<?php
   $a = 42;
   $b = 20;

   $c = $a + $b;
   echo "Addition Operation Result: $c \n";

   $c += $a;
   echo "Add AND Assignment Operation Result: $c \n";

   $c -= $a;
   echo "Subtract AND Assignment Operation Result: $c \n";

   $c *= $a;
   echo "Multiply AND Assignment Operation Result: $c \n";

   $c /= $a;
   echo "Division AND Assignment Operation Result: $c \n";

   $c %= $a;
   echo "Modulus AND Assignment Operation Result: $c";
?>

It will produce the following output −

Addition Operation Result: 62 
Add AND Assignment Operation Result: 104 
Subtract AND Assignment Operation Result: 62 
Multiply AND Assignment Operation Result: 2604 
Division AND Assignment Operation Result: 62 
Modulus AND Assignment Operation Result: 20