How can PHP be used to retrieve and display information like IP addresses and host names in HTML forms?

To retrieve and display IP addresses and host names in HTML forms using PHP, you can use the $_SERVER superglobal array to access this information. You can then echo out the values in your HTML form using PHP. This allows you to dynamically display the user's IP address and host name on your webpage. 

<?php
$ipAddress = $_SERVER['REMOTE_ADDR'];
$hostName = gethostbyaddr($_SERVER['REMOTE_ADDR']);
?>

<form>
    <label for="ip-address">IP Address:</label>
    <input type="text" id="ip-address" value="<?php echo $ipAddress; ?>" readonly>
    
    <label for="host-name">Host Name:</label>
    <input type="text" id="host-name" value="<?php echo $hostName; ?>" readonly>
</form>

Keywords

PHP IP address host name HTML form retrieval

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