Sophie: php-manual-en-4.3.0-2mdk noarch

php-manual-en-4.3.0-2mdk.noarch.rpm

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>crc32</H1
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><P
>    (PHP 4 &#62;= 4.0.1)</P
>crc32&nbsp;--&nbsp;Calculates the crc32 polynomial of a string</DIV
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><H2
>Description</H2
>int <B
CLASS="methodname"
>crc32</B
> ( string str)<BR
></BR
><P
>&#13;     Generates the cyclic redundancy checksum polynomial of 32-bit
     lengths of the <TT
CLASS="parameter"
><I
>str</I
></TT
>. This is usually used
     to validate the integrity of data being transmitted.
    </P
><P
>&#13;     <DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Note: </B
>
       Because PHP's integer type is signed, and many crc32 checksums will
       result in negative integers, you need to use the "%u" formatter of
       <A
HREF="function.sprintf.html"
><B
CLASS="function"
>sprintf()</B
></A
> or <A
HREF="function.printf.html"
><B
CLASS="function"
>printf()</B
></A
> to get
       the string representation of the unsigned crc32 checksum.
      </P
></BLOCKQUOTE
></DIV
>
     This second example shows how to print a converted checksum with the
     <A
HREF="function.printf.html"
><B
CLASS="function"
>printf()</B
></A
> function :
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>Example 1. Displaying a crc32 checksum</B
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>&#60;?php
$checksum = crc32("The quick brown fox jumped over the lazy dog.");
printf("%u\n", $checksum);
?&#62;</PRE
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>&#13;     See also <A
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>md5()</B
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