April 24th, 2006
Ping a Server/Remote Host With PHP
I had previously posted the code to ping a server or remote host from an ASP page. Well no doubt there are many PHP programmers that would like to be able to ping from a PHP page or web application as well. This would be handy for testing up-time and server status. The code also includes code to prevent form spoofing.
The function also uses a regular expression to validate the IP address format.
You can use CSS to style the output, make it look like a command prompt if you want!
<?php
// Address error handling.
ini_set('display_errors', 1);
error_reporting(E_ALL ^ E_NOTICE);
// Obtain POST data.
$ping_ip_addr = $_POST['ping_ip_addr'];
$ping_count = $_POST['ping_count'];
// Remove any slashes
if (get_magic_quotes_gpc())
$ping_ip_addr = stripslashes($ping_ip_addr);
// Create arrays.
$ping_count_array = array(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 25); // Ping count
?>
<html>
<head>
<title>Ping</title>
</head>
<body>
<h1>Ping</h1>
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post">
<p><label for="ping_ip_addr">IP address:</label><br />
<input name="ping_ip_addr" id="ping_ip_addr" type="text" value="<?php echo $_POST['submit'] == 'Ping' ? htmlentities($ping_ip_addr, ENT_QUOTES) : $_SERVER['REMOTE_ADDR'];; ?>" size="40" maxlength="15" /></p>
<p><label for="ping_count">Ping count:</label><br />
<select name="ping_count" id="ping_count">
<?php
foreach ($ping_count_array as $ping_count_item)
{
echo '<option' . ($ping_count == $ping_count_item ? ' selected="selected"' : '') . '>' . $ping_count_item . '</option>' . "\n";
}
?>
</select></p>
<p><input type="submit" name="submit" value="Ping" /></p>
</form>
<p>Ping may take a while, please be patient.</p>
<?php
if ($_POST['submit'] == 'Ping')
{
echo '<div class="output">' . "\n";
// Check for spoofed form submission.
$illegal = FALSE;
if (strlen($ping_ip_addr) > 15)
$illegal = TRUE;
if (!in_array($ping_count, $ping_count_array))
$illegal = TRUE;
if (!$illegal) // Form submission was not spoofed.
{
if (ereg('^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$', $ping_ip_addr)) // Acquired data contains no problems.
{
// Display result.
echo '<pre>' . "\n" .
'ping -c ' . $ping_count . ' ' . $ping_ip_addr . "\n\n";
system('ping -c ' . $ping_count . ' ' . $ping_ip_addr); // Ping IP address.
echo '</pre>' . "\n" .
'<p>Ping complete.</p>' . "\n";
}
else // data contains problems!
{
echo '<p>Please enter a valid IP address.</p>' . "\n";
}
}
else // Form submission was spoofed!
{
echo '<p>An illegal operation was encountered.</p>' . "\n";
}
echo '</div>' . "\n";
}
?>
</body>
</html>
This code was adapted from an example on Daniweb
on April 26th, 2009 at 1:41 am
I copied and pasted… and I get these errors (PHP 5.2.9-2):
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in w:\www\ip.php on line 31
Parse error: parse error in W:\www\ip.php on line 31