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    PHP Increment and Decrement Operators: Modifying Variable Values

    Rumman Ansari July 09, 2024 6,043 views
    PHP Increment and Decrement Operators: Modifying Variable Values

    The PHP increment operators are used to increment a variable's value.

    The PHP decrement operators are used to decrement a variable's value.

    Operator Name Description
    ++$x Pre-increment Increments $x by one, then returns $x
    $x++ Post-increment Returns $x, then increments $x by one
    --$x Pre-decrement Decrements $x by one, then returns $x
    $x-- Post-decrement Returns $x, then decrements $x by one

    Example: ++$x Pre-increment

    Code: 

    

<!DOCTYPE html>
<html>
<body>

<?php
$x = 15;  
echo ++$x;
?>  

</body>
</html>

    Output:

    This will produce the following result 

    

16

    Example: $x++ Post-increment

    Code: 

    

<!DOCTYPE html>
<html>
<body>

<?php
$x = 15;  
echo $x++;
?>  

</body>
</html>

    Output:

    This will produce the following result 

    

15

    Example: --$x Pre-decrement

    Code: 

    

<!DOCTYPE html>
<html>
<body>

<?php
$x = 15;  
echo --$x;
?>  

</body>
</html>

    Output:

    This will produce the following result 

    

14

    Example: $x-- Post-decrement

    Code: 

    

<!DOCTYPE html>
<html>
<body>

<?php
$x = 15;  
echo $x--;
?>  

</body>
</html>

    Output:

    This will produce the following result 

    

15