Convert PHP crc32() to Ruby | PHP to Ruby

crc32

Posted on September 17th, 2009 RubyLove 1 comment

The crc32() function in PHP generates the cyclic redundancy checksum (CRC) polynomial of 32-bit lengths of a string, and returns it as an integer.

PHP
```
$checksum = crc32('hello world');
echo $checksum;
// => 222957957
```
Ruby
```
require 'zlib';
puts Zlib.crc32('hello world');
# => 222957957
```
See Also
- md5
- sha1
PHP, Ruby crc32 crypt, strings
One response to “crc32”
1. Cristian Livadaru February 13th, 2010 at 20:23
  
  Take care when comparing ruby results with php results. The php manual says:
  
  Because PHP’s integer type is signed, and many crc32 checksums will result in negative integers, you need to use the “%u” formatter of sprintf() or printf() to get the string representation of the unsigned crc32 checksum.
  
  So in case you have a negative number in PHP don’t be afraid, it’s not wrong! Display it with printf(”%u”,$checksum) and compare THAT result o the Ruby result !
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