[php] display the usernames of autharray

Erhnam · 02-04-2005, 04:50 AM

On my local linux machine I have a extracted with a perl script from the /etc/passwd file a list of usernames. In php I want to display all usernames, and later on manipulate them. Some example data:

infobot:!!:510:511::/home/infobot:/bin/bash
erhnam:$1$xluT7i6/$fEqbxpnBPjM:513:514::/home/erhnam:/bin/bash
mhuser01:$1$j.u3BOFHmfoo2Ab/:514:515::/home/mohaa/:/bin/bash

I tried to use the explode function to extract only the username. But I'm only getting back: 'array'. Code:

Code:

$autharray = file("/var/www/html/passwd.file");

$userlist = explode(":", $autharray);
$overview = $userlist[0];

echo $userlist;
echo ("<br>");
echo $overview;
echo ("<br>");
echo nl2br(implode("\n",$autharray));
echo ("<br>");
?>

I'm able to display all the values with: echo nl2br(implode("\n",$autharray));

echo $userlist; gives me Array
echo $overview; gives me also Array

Anyone can tell me how I can display only the usernames on the screen?

N43 · 02-04-2005, 05:24 AM

file() returns an array. You have to cyle threw the array with foreach.

PHP Code:



<?php 
   $autharray = file("/var/www/html/passwd.file"); 
 
   foreach ($autharray as $auth) 
   { 
      $userlist[] = explode(":", $auth); 
   } 
 
   $overview = $userlist[0][0]; 
   echo $userlist; 
   echo ("<br>"); 
   echo $overview; 
   echo ("<br>"); 
   echo nl2br(implode("\n",$autharray)); 
   echo ("<br>"); 
?>

echo $userlist will still display Array but echo $overview will now display a user name.

I didn't test the code but it should work.

Erhnam · 02-04-2005, 05:42 AM

Thanks, but I'm now only getting the first value from the Array. Do you what to do, to get the whole list?

Code:

for ($x = 0; $x < count($autharray); $x++)

But how to implement this??

keefaz · 02-04-2005, 07:40 AM

I would avoid the use of file() because it is a slow function, instead use fopen() or
file_get_contents().
If all you want is the usernames from the /etc/passwd file, you could do :

PHP Code:



$fd = fopen("/etc/passwd", "r"); 
$users = Array(); 
while (($line = fgetcsv($fd, 1000, ":")) !== FALSE) { 
    $users[] = $line[0]; 
} 
fclose($fd); 
for ($x = 0, $count = count($users); $x < $count; $x++) { 
    echo $users[$x]."<br>"; 
}

Erhnam · 02-04-2005, 07:58 AM

Thanks a lot!!

Do you know if it would be possible to search.. I already tried some thing like this.. But it is not working for me

$search = Array();
$users = array_search ("001", $search);

keefaz · 02-04-2005, 08:08 AM

search the position for user in the list ?

PHP Code:



$key = array_search("root", $users); 
if($key === FALSE) { 
    echo "Weird, no root user..."; 
    exit(1); 
} else { 
    echo "found root at position $key of the users array"; 
}

Erhnam · 02-04-2005, 08:12 AM

This is not realy what I mean.. I want to list all the user that has (for example) a value in it with 'ab'

So if the array is (dog, monkey, abba, abo, mouse)
The result should be:

abba
abo

keefaz · 02-04-2005, 08:29 AM

I have not idea of an elegant solution, I would do :

PHP Code:



$result = Array(); 
$search = "ab"; 
for ($x = 0, $count = count($users); $x < $count; $x++) { 
    if(($found = strripos($users[$x], $search)) !== FALSE) { 
        $result[] = $users[$x]; 
    } 
} 
 
if(count($result) > 0) { 
    echo "user(s) found !"; 
    print_r($result); 
} else { 
    echo "no user was found"; 
}

[edit]
strripos seems to be in PHP5 only...
So add these lines for PHP4 (example from php.net) :

PHP Code:



function strripos($haystack, $needle) 
{ 
   return strpos(strtolower($haystack), strtolower($needle)); 
}

Erhnam · 02-08-2005, 08:31 AM

Okey! This worked for me. I used the print and echo functions at the end of the screen to see if it works and yes! I'm now getting a nice filtered list.. My last problem:

Now I have a list with all the users I want to combine it together with the command below. For each user I want to see the results of 'netstat -ea | grep user'.

Like:

user01:
tcp 0 0 83.98.xx.xx:xxxx *:* LISTEN user01 1141153923

Do you think this is possible? And where to start!? Really thanks for all your help! I tried already something with:

PHP Code:



foreach ($result as $inhoud) { 
$inhoud = $inhoud; 
echo "$inhoud<br /> \"'netstat -ea | grep $inhoud'\"<br /><br />\n"; 
} 
echo "<br><br>";

or

PHP Code:



foreach ($result as $inhoud) { 
$inhoud = $inhoud; 
echo "$inhoud<br />\n"; 
exec ("'netstat -ea | grep $inhoud'", $userstatus); 
echo nl2br(implode("\n",$userstatus)); 
print ("<br>");

PHP Code:



<? 
 
function strripos($haystack, $needle) 
{ 
   return strpos(strtolower($haystack), strtolower($needle)); 
} 
 
$fd = fopen("/var/passwd", "r");  
 
$users = Array();  
while (($line = fgetcsv($fd, 1000, ":")) !== FALSE) {  
    $users[] = $line[0];  
}  
fclose($fd);  
 
$result = Array(); 
$search = "user"; 
for ($x = 0, $count = count($users); $x < $count; $x++) { 
    if(($found = strripos($users[$x], $search)) !== FALSE) { 
        $result[] = $users[$x]; 
    } 
} 
 
 
if(count($result) > 0) { 
    echo "user(s) found !<br><br>"; 
 
    echo "$result<br><br>"; 
 
    print_r ($result); 
    echo "<br><br>"; 
 
for ($y = 0, $count = count($result); $y < $count; $y++) { 
echo $result[$y]."<br>"; 
 
} 
 
} else { 
    echo "no user was found"; 
} 
 
?>

keefaz · 02-08-2005, 12:50 PM

I would use :

PHP Code:



... 
... 
// find if a string contain an userfrom the list, if yes return its position 
function find_user($list, $string) { 
    $i = 0; 
    foreach($list as $user) { 
        if(strriipos($string, $user) > 0) { 
            return $i; 
        } 
        $i++; 
    } 
    return false; 
} 
 
// Array where all relevant netstat lines will be stored, its key will be 
// the user name 
$users_net = Array(); 
 
// open a pipe so you can easilly read line by line 
$netstat = popen("netstat -an", "r"); 
 
if(!$netstat) { 
    echo "could not open netstat"); 
    exit; 
} 
 
while($line = fgets($netstat, 1024)) { 
    $key = find_user($users, $line); 
    if($key !== false) { 
        $users_net[$users[$key]][] = $line; 
    } 
} 
 
pclose($netstat); 
 
// output result 
print_r($users_net);