PHP Assignment Operators
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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