w3resource

PHP: Incrementing Decrementing Operators

Description

PHP supports C-style pre and post increment and decrement operators. The Increment/decrement operators operate only on variables and not on any value.

List of increment/decrement operators

Example Name Effect
++$x Pre-increment Increments $x by 1, then returns $x.
$x++ Post-increment Returns $x, then increments $x by 1.
--$x Pre-decrement Decrements $x by 1, then returns $x.
$x-- Post-decrement Returns $x, then decrements $x by 1.

Example:

<?php
$a = 10;
echo 'Value of $a is :'.$a;
echo '<br />After Pre-increment value of $a ( i.e. ++$a ) is: '.++$a;
$a = 20;
echo '<br />Value of $a is :'.$a;
echo '<br />After Post-increment value of $a ( i.e. $a++ ) is: '.$a++;
$a = 30;
echo '<br />Value of $a is :'.$a;
echo '<br />After Pre-decrement value of $a ( i.e. --$a ) is: '.--$a;
$a = 40;
echo '<br />Value of $a is :'.$a;
echo '<br />After Post-decrement value of $a ( i.e. $a-- ) is: '.$a--;
?>

Output:

Value of $a is :10
After Pre-increment value of $a ( i.e. ++$a ) is: 11
Value of $a is :20
After Post-increment value of $a ( i.e. $a++ ) is: 20
Value of $a is :30
After Pre-decrement value of $a ( i.e. --$a ) is: 29
Value of $a is :40
After Post-decrement value of $a ( i.e. $a-- ) is: 40

View the example in the browser

Previous: Array Operators
Next: if else elseif statement



PHP: Tips of the Day

Convert HTML + CSS to PDF

Important: Please note that this answer was written in 2009 and it might not be the most cost-effective solution today in 2019. Online alternatives are better today at this than they were back then.

Here are some online services that you can use:

  • PDFShift
  • Restpack
  • PDF Layer
  • DocRaptor
  • HTMLPDFAPI
  • HTML to PDF Rocket

Have a look at PrinceXML.

It's definitely the best HTML/CSS to PDF converter out there, although it's not free (But hey, your programming might not be free either, so if it saves you 10 hours of work, you're home free (since youalso need to take into account that the alternative solutions will require you to setup a dedicated server with the right software).

Ref : https://bit.ly/384yytr