Solved

Can crc32() ever return a 5 digit number?

Posted on 2008-06-19
3
373 Views
Last Modified: 2008-06-19
From all my tests crc32 always generates a 9 digit number that is either positive or negative.

         <?php
         echo crc32("Hello"); //// Returns  -137262718
         ?>

But could crc32 ever return a 5 or 10 digit number, or a number that began with 0 like 007262718 ?
0
Comment
Question by:hankknight
  • 2
3 Comments
 
LVL 53

Accepted Solution

by:
Infinity08 earned 300 total points
ID: 21822977
It can return any value that can be represented by a 32 bit value.

Which value you get depends on how you interpret the value. You interpret it as a signed integer, so the values you can get are any value between -2147483648 and 2147483647
0
 
LVL 2

Assisted Solution

by:kszurek
kszurek earned 200 total points
ID: 21822990

<?PHP

function x($a)

{

	$b = abs(crc32($a));

	$strlen = 10-strlen($b);

	$b = str_repeat(0, $strlen).$b;

	return $b;

}

echo x("Hello");

?>

Open in new window

0
 
LVL 53

Expert Comment

by:Infinity08
ID: 21823004
Note that a CRC32 value is usually shown in hexadecimal.

So, instead of -137262718 for example, you'd show :  F7D18982
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

When the confidentiality and security of your data is a must, trust the highly encrypted cloud fax portfolio used by 12 million businesses worldwide, including nearly half of the Fortune 500.
This article discusses how to create an extensible mechanism for linked drop downs.
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…
With Secure Portal Encryption, the recipient is sent a link to their email address directing them to the email laundry delivery page. From there, the recipient will be required to enter a user name and password to enter the page. Once the recipient …

911 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

19 Experts available now in Live!

Get 1:1 Help Now