Assignment Operators

PHP/Assignment Operators

Assignment Operators

PHP uses the (=) to represent the assignment operator. The following shows the syntax of the assignment operator:

$variable_name = value;

On the left side of the assignment operator (=) is a variable to which you want to assign a value. And on the right side of the assignment operator (=) is a value.

Assignment by reference is also supported, using the "$var = &$othervar;" syntax. Assignment by reference means that both variables end up pointing at the same data, and nothing is copied anywhere.

$var = 5;

$var1 = &$var; // $var1 is a reference to $var

Arithmetic Assignment Operators

Example	Equivalent	Operation
$a += $b	$a = $a + $b	Addition
$a -= $b	$a = $a - $b	Subtraction
*$a = $b**	*$a = $a $b**	Multiplication
$a /= $b	$a = $a / $b	Division
$a %= $b	$a = $a % $b	Modulus
$a = $b**	$a = $a ** $b	Exponentiation

Example

<?PHP

$a = 22; //Assign Value to a.

$b = 20; //Assign Value to b.

$Sum = $a + $b;

echo "Addition Operation Result: $Sum ";

$Sum += $a;

echo "Add AND Assignment Operation Result: $Sum ";

$Sum -= $a;

echo "Subtract AND Assignment Operation Result: $Sum ";

$Sum *= $a;

echo "Multiply AND Assignment Operation Result: $Sum ";

$Sum /= $a;

echo "Division AND Assignment Operation Result: $Sum ";

$Sum %= $a;

echo "Modulus AND Assignment Operation Result: $Sum ";

The result of the above code is:

Bitwise Assignment Operators

Operation	Example	Equivalent
And Assignment (&=)	$a &= $b	$a = $a & $b
Or Assignment (\|=)	$a \|= $b	$a = $a \| $b
Xor Assignment (^=)	$a ^= $b	$a = $a ^ $b
Left Shift Assignment (<<=)	$a <<= $b	$a = $a << $b
Right Shift Assignment (>>=)	$a >>= $b	$a = $a >> $b

Example:

 <?php
 $x = 19;
  $x &= 7;
  $result= $x;
  echo "And Assignment Result: $result <br/>";
  $y = 19;
  $y |= 7;
  $result= $y;
  echo "Or Assignment Result: $result <br/>";
  $z = 19;
  $z ^= 7;
  $result= $z;
   echo "Xor Assignment Result: $result <br/>";
  $f = 7;
  $f <<= 2;
  $result= $f;
echo "Right Shift Assignment Result: $result <br/>";
  $g = 19;
  $g >>= 2;
  $result= $g;
  echo "Right Shift Assignment Result: $result <br/>";

?>

PHP

Assignment Operators