[SOLVED] PHP - retrieve ip from string using reg exp

[jokerbla]

Hi there,

I'm trying to get the ips from a string using reg exp.

$file = "120.255.39.1 stringstring.zz.111.222.111.222 [150.100.100.2]";
$regexp = '/^((1?\d{1,2}|2[0-4]\d|25[0-5])\.){3}(1?\d{1,2}|2[0-4]\d|25[0-5])$/';
preg_match_all($regexp, $file, $ips);
print_r($ips);

Obviously it's not working cause the string has to match $regexp for the array to get filled. I think I'm supposed to use preg_split and explode?! I'm sort of new to this, could anyone help please?

[Maq]

Can you list the rules for your match?  For something general you could use something like:

 

$file = "120.255.39.1 stringstring.zz.111.222.111.222 [150.100.100.2]";
$regexp = "~(\d{1,3}\.?){4}~";
preg_match_all($reg, $file, $ips);
print_r($ips[0]);

?>

 

This may match more then you desire, i.e. numbers over 255, which is why again, we need details.  You can take a gander at some examples here - http://www.regular-expressions.info/examples.html.

[jokerbla]

Well the ip validation was not that important, I managed to get what I wanted using preg_split. But I have another problem now..

 

let's say in.txt looks like this

text 222.333
235.232.124.122[][[][222.999.111.111]  text22 199.199.199.100 222.999.111.111

my code looks like this

<?php
$file = file_get_contents ('in.txt');
$sp = preg_split('/ /', preg_replace('/\[|\] /',' ',$file));
$regexp = '/^\b([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\b$/';
$grep = preg_grep($regexp, $sp);
print_r($grep);
echo "<br /><br /><br />";
$j=0; $ip=NULL;
for ($i=0;$i<=sizeof($sp);$i++)
{	
if(isset($grep[$i])) 
{
        $ip[$j]=$grep[$i]; $j++;
}
}
print_r($ip);

Is there a function I can use to skip the elements in the array that repeat themselves? Like if I have an ip twice(like 222.999.111.111 in my example) or more times, can I just print it once, or even better, modify the array to just hold it once? .. this of course, without using another loop like a for or while

[Maq]

Try - array_unique.

[jokerbla]

Works perfectly thanks, how about if I have another array $array2 and I want to exclude the elements in that array?

Like I don't want the ips in $array2 to exist(or at least be printed) in my array $ip that contains all the ips from in.txt

 

Is there a function for that? Or a more simple way to do it?

[Maq]

If you put them both into arrays you can use - array_diff.

[jokerbla]

I think array_unique() had a limitation when comparing the arrays, had to print to file and read again so there'd be less elements in the array.

 

Anyway, now I can't figure out how to print the whole array to a text file with a new line between each ip.

 

obviously this doesn't work

<?php
$ip = implode("\n\r", $ip);
file_put_contents('out.txt', $ip);

should I use something different than implode?

[Maq]

That should work, can I see the current code?

[jokerbla]

<?php
$file = file_get_contents ('in.txt');

$npc[0]="1.1.1.1";
$npc[1]...
//and so on

$sp = preg_split('/ /', preg_replace('/\[|\] /',' ',$file));
$sp = array_unique($sp);


//$regexp = '/^\b(??:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\b$/';
$regexp = '/^\b([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\b$/';

$grep = preg_grep($regexp, $sp);
$sp = implode(' ', $sp);
file_put_contents('out.txt', $sp);
$file = file_get_contents ('out.txt');
$sp = preg_split('/ /', $file);
//could have made a function here I guess

$grep = preg_grep($regexp, $sp);
print_r($grep);
echo "<br /><br /><br />";
$j=0; $ip=NULL;
for ($i=0;$i<=sizeof($sp);$i++)
{	
if(isset($grep[$i])) 
{$ip[$j]=$grep[$i]; $j++;}
}
$ip = array_diff($ip,$npc);
print_r($ip);
$ip = implode(" ", $ip);
file_put_contents('out.txt', $ip);

[Maq]

The print_r($ip); prints out an array right?

 

Try changing these last lines.

 

$input = implode("\n", $ip);
file_put_contents("out.txt", $input);

[jokerbla]

still doesn't work with notepad

in wordpad it does the new lines

 

what's the code for new line in the encoding notepad uses? (perhaps that might work?)

[jokerbla]

Couldn't get it to work for notepad, guess I'll just leave it like that.

Thanks a lot for all the help.

This was a script for an online game ( www.slavehack.com ) to filter all the ips from the npc and slave ones, so I don't have to check every one, which takes a lot of time. Ofc I've done it to learn php, I'm not playing the game that much now.