PHP ip2long() Function

The PHP ip2long() function converts IPv4 address (dotted IP address) into a long integer.

Syntax

ip2long(ip)

Parameters

`ip`	`Required.` Specify the standard IP address.

Return Value

Returns the long integer or false if the IP address is invalid.

Example:

The example below shows the usage of ip2long() function.

<?php
$host="alphacodingskills.com";
$ip = gethostbyname($host);

echo "The following URLs are equivalent: \n";
echo "1. https://".$host."\n".
     "2. https://".$ip."\n".
     "3. https://".sprintf("%u", ip2long($ip))."/";
?>

The output of the above code will be:

The following URLs are equivalent: 
1. https://alphacodingskills.com
2. https://35.192.78.222
3. https://599805662/

Example:

Consider one more example where this function is used with a number of hostnames.

<?php
$hosts=["alphacodingskills.com",
        "google.com",
        "youtube.com",
        "facebook.com"];

$out = "Equivalent Contents:";
 
foreach($hosts as $host) {
  $ip = gethostbyname($host);
  $out .= "\nhttps://". $host ."/  https://". $ip .
            "/  https://". sprintf("%u", ip2long($ip)) ."/";
}
 
echo $out;
?>

The output of the above code will be:

Equivalent Contents:
https://alphacodingskills.com/  https://35.192.78.222/  https://599805662/
https://google.com/  https://173.194.193.139/  https://2915221899/
https://youtube.com/  https://142.250.128.91/  https://2398781531/
https://facebook.com/  https://157.240.2.35/  https://2649752099/

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