String Funkcje
PHP Manual

crc32

(PHP 4 >= 4.0.1, PHP 5)

crc32Calculates the crc32 polynomial of a string

Opis

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.

Parametry

str

The data.

Zwracane wartości

Returns the crc32 checksum of str as an integer.

Przykłady

Przykład #1 Displaying a crc32 checksum

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

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

Zobacz też:


String Funkcje
PHP Manual