fixed preceeding 0's

Hi,
I am using Ckaephp but php will do for this.
I just need to know how to store preceding 0's in front of a integer variable so I have always 6 digits.

I saw sprintf but I dont know how to keep 6 digits to a number always.

$InvoiceNo =1;  but I want $InvoiceNo =000001;
I also want to add to this number $InvoiceNo +=1; will append the 0's and 10 wil be 000010

 $this->request->data['TimesheetDate'][$key]['invoice']=$InvoiceNo ;  will add this number to the DB and this currently works without leading 0's
jagguyAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

GaryCommented:
http://php.net/manual/en/function.str-pad.php

str_pad($the_number, 6, "0", STR_PAD_LEFT);

Open in new window

0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Ray PaseurCommented:
The problem with this question is that it overlooks the essential "loose-typing" nature of PHP.  Here's an example of how you can try to do the right thing and still get screwed:

$num = str_pad($the_number, 6, "0", STR_PAD_LEFT);
$num++;
echo $num; // NOT WHAT YOU WANT AT ALL!

PHP silently converts data elements into representations that are appropriate for the context in which they are used.  In arithmetic, character strings may be treated as if they were numbers.  In printing, numbers may be dynamically converted to string.  Don't even go there with arrays and objects!

Executive summary: If you want to echo a padded numeric value, do the string padding immediately before you echo the value.
0
Dave BaldwinFixer of ProblemsCommented:
What Ray said.  ^^^ As soon as you do anything mathematical to a PHP variable, leading zeros (and trailing text!) are Gone.
0
Ray PaseurCommented:
PHP str_pad() is a good function, but only if you use it at exactly the right time.  What is that time? For anyone coming across this question in the future, please read the response here:
http://www.experts-exchange.com/Programming/Languages/Scripting/PHP/Q_28540130.html#a40389505
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
PHP

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.