===== Syntax =====

<code php>int crc32(string $str)</code>

//(PHP 4 >= 4.01, PHP 5)//

^ $str | Source text or binary string for the CRC calculation. |
^ RETURNS | Cyclical Redundancy Checksum as an integer value. |

===== What it Does =====

Use this method to calculate the Cyclical Redundancy Check (checksum) for string or binary data.  The result is a signed integer, if you want to convert it to signed, you will need to convert the result using [[sprintf]] as shown in the example below.

===== Example =====

<code php>
// calulate the checksum from a form post
$chksum = crc32($_POST['body']);
echo sprintf('The checksum is: %u', $chksum);
</code>