IP address last code censored.

[ted_chou12]

an ip looks roughly like this: 123.456.789.012

i want the forth combination to be censored to xxx, is it possible?

Ted

[effigy]

<pre>
<?php
// Run 10 tests.
for ($i = 0; $i < 10; $i++) {
	// Generate an IP.
	for ($j = 0; $j < 4; $j++) {
		$ip_pieces[] = rand(1, 255);
	}
	$ip = join($ip_pieces, '.');
	// Run regex.
	printf('%15s => %-15s<br>', $ip, preg_replace('/(\d{1,3}\.\d{1,3}\.\d{1,3}\.)\d+/', '\1xxx', $ip));
	// Reset.
	$ip_pieces = null;
}
?>
</pre>

[mjlogan]

a messy looking one-liner, using no expressions, kind of not the point of this forum 

 

 

substr(implode("", array(substr($myIP, 0, strrpos($myIP, ".")+1), 'xxx')), 0, strlen($myIP));