crc32¶
crc32 stands for Cyclic Redundancy Check 32-bit. It is a hash function that produces a 32-bit (8-character hexadecimal) checksum or hash value from a given input, typically a sequence of bytes or a string. The primary purpose of CRC32 is error-checking and data integrity verification.
crc32() is also a native PHP function.
<?php
$checksum = crc32("The quick brown fox jumped over the lazy dog.");
printf("%u\n", $checksum);
?>