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>ip2long</H1
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><P
> (PHP 4 )</P
>ip2long --
Converts a string containing an (IPv4) Internet Protocol dotted address
into a proper address.
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><H2
>Description</H2
>int <B
CLASS="methodname"
>ip2long</B
> ( string ip_address)<BR
></BR
><P
> The function <B
CLASS="function"
>ip2long()</B
> generates an IPv4 Internet
network address from its Internet standard format (dotted string)
representation.
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><B
>Ejemplo 1. <B
CLASS="function"
>ip2long()</B
> Example</B
></P
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><PRE
CLASS="php"
><?php
$ip = gethostbyname("www.example.com");
$out = "The following URLs are equivalent:<br>\n";
$out .= "http://www.example.com/, http://".$ip."/, and http://".sprintf("%u",ip2long($ip))."/<br>\n";
echo $out;
?></PRE
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>
<DIV
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><BLOCKQUOTE
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><P
><B
>Nota: </B
>
Because PHP's integer type is signed, and many IP addresses 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 IP address.
</P
></BLOCKQUOTE
></DIV
>
This second example shows how to print a converted address with the
<A
HREF="function.printf.html"
><B
CLASS="function"
>printf()</B
></A
> function :
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><B
>Ejemplo 2. Displaying an IP address</B
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><PRE
CLASS="php"
><?php
$ip = gethostbyname("www.example.com");
printf("%u\n", ip2long($ip));
echo $out;
?></PRE
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>
</P
><P
> See also: <A
HREF="function.long2ip.html"
><B
CLASS="function"
>long2ip()</B
></A
>
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