   #PHP Manual String functions count_chars crypt

   PHP Manual
   Prev  Next
   ______________________________________________________________________

                                     crc32

   (PHP 4 >= 4.0.1)
   crc32 -- Calculates the crc32 polynomial of a string

Description

   int crc32 ( string str)

   Generates the cyclic redundancy checksum polynomial of 32-bit lengths
   of the str. This is usually used to validate the integrity of data
   being transmitted.

   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.

   This second example shows how to print a converted checksum with the
   printf() function:

   Example 1. Displaying a crc32 checksum
   <?php
   $checksum = crc32("The quick brown fox jumped over the lazy dog.");
   printf("%u\n", $checksum);
   ?>

   See also md5() and sha1().
   ______________________________________________________________________

   Prev        Home  Next
   count_chars  Up  crypt
