Modify existing regex to support commas and spaces

[solarisuser]

Hi All,

 

regex newb trying to figure this out..

 

I use

/^(\d{1,3}\.){3}\d{1,3}$/

to validate IP addresses in a text field.  I would like to add support for commas and spaces, so I can allow something like "192.168.0.1, 192.168.0.2"

 

Thanks

[effigy]

This will allow a comma with spaces, or just spaces:

 

<pre>
<?php

$ips = array(
	'192.168.0.1, 192.168.0.2',
	'192.168.0.1 192.168.0.2',
	'192.168.0.1 192.168.0.2,',
	'192.168.0.1 192.168.0.2   '
);

foreach ($ips as $ip) {
	echo $ip, '<br>',
		preg_match('/^(??:\d{1,3}\.){3}\d{1,3}(?:\z|,?\s+))+\z/', $ip) ?
		'Matches' : 'Does not match', '<br>';
}

?>
</pre>

[solarisuser]

It doesn't work =(

 

I used http://www.codehouse.com/webmaster_tools/regex/ to verify...

 

1.1.1.1, 1.1.1.2

or

1.1.1.1,1.1.1.2

[effigy]

It probably does not support PREG. If you plug those two values into the $ips array you'll see that the first works and the second does not (because the pattern is requiring at least one space since the comma is optional).

[MadTechie]

try

^(??:\d{1,3}\.){3}\d{1,3}(?:\z|,?\s+))+

 

or use effigy code (better solution)

[solarisuser]

I'd like to modify the request. 

 

Using this regex:

\b(??:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\b

 

I'd like to modify it to allow commas, followed by an additional IP, up to an unlimited amount of times, without having a comma at the end.

 

For example: 192.168.1.1,192.168.1.2,192.168.1.3          , or just 192.168.1.1

 

Thanks - its been a tough one for me to try and figure out!

[MadTechie]

Try this.. seams to work fine

<?php
$IPs = "192.168.1.1,192.168.1.2,192.168.1.3";
//$IPs = "192.168.1.1";

preg_match_all('/\b(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\b/', $IPs, $result, PREG_PATTERN_ORDER);
$result = $result[0];

//print_r($result);
foreach($result as $IP)
{
echo "$IP<br />";
}

?>