I want to find the load average of the server to which am connected full time, I used the following code, but I get error on displaying the up time. please some one help me fix this...
Here is the code
<?php
$ip = '192.168.71.56';
$user = 'viju';
$pass = 'viju';
$connection = ssh2_connect($ip);
if($connection)
{
echo "connection successful";
}
else
{
echo "connection failed";
}
if(!(ssh2_auth_password($connection,$user,$pass)))
{
echo "Authentication Failed";
}
else
{
echo "Authentication Successful";
$shell = ssh2_shell($connection,"uptime");
if($shell)
{
$loadAvgString=explode('average:',$shell); //line 26
print_r($loadAvgString);
$loadAvgInAnArray=explode(',',$loadAvgString);
print_r($loadAvgInAnArray);
}
else
{
echo "No data fetched";
}
}
?>
I get the following output with Warning
connection successful Authentication Successful
Warning: explode() expects parameter 2 to be string, resource given in /var/www/extra/dis.php on line 26 Array ( [0] => )
The second parameter for explode must be a string joined using the string delimiter.just print that $shell variable and check whether it holds a string or not
You should check if $shell contains something rather than whether or not it is true
if (!empty($shell)) {
...
}
even better
if (strstr($shell, "average:")) {
...
}
Related
I'm creating a button on my web page.I want that when someone presses this button an execution of a process of Linux commands on my first server (like "cd file" "./file_to_execute"..) when these commandes are done and finished i want to connect on another server by ssh and to execute another commands.
the probleme is how can i know that the commands before are already finished to proceed to the second part which is to connect on another server .
to resume :
first step connect on the first server , execute some commands
=> when these commands are done ( the part i dont know how to do it )
second step : to connect on another server and execute some others commands.
I'm searching for a way that will allows me to add some pop up to inform the user of my web page that he finished the first step and he started the second.
<?php
$hostname = '192.177.0.252';
$username = 'pepe';
$password = '*****';
$commande = 'cd file && ./file_one.sh';
if (false === $connection_first = ssh2_connect($hostname, 22)) {
echo 'failed<br />';
exit();
}
else {
echo 'Connected<br />';
}
if (false === ssh2_auth_password($connection_first, $username, $password)) {
echo 'failed<br />';
exit();
}
else {
echo 'done !<br />';
}
if (false === $stream = ssh2_exec($connection_first, $commande)) {
echo "error<br />";
}
?>
Thanks
PS: sorry for my English, I'm from Barcelone
To handle events where an exception occurs i would recommend using a try/catch statement, like the one below:
try {
echo inverse(5) . "\n";
echo inverse(0) . "\n";
} catch (Exception $e) {
echo 'Caught exception: ', $e->getMessage(), "\n";
}
When you're trying to handle events and need to know when they finish, there are a few ways to achieve this. You can either set a boolean to true after the command has been executed (like what you are already doing). OR you can return output from the command by printing the output to a txt file and then echoing out the returns of this file. See code below:
exec ('/usr/bin/flush-cache-mage > /tmp/.tmp-mxadmin');
$out = nl2br(file_get_contents('/tmp/.tmp-mxadmin'));
echo $out;
At this point you can create conditions based off of what is returned in the $out variable.
What's wrong with this preg_match() usage? I want to check steam lobby link and if it's matching then write to database. If not, just echo the error. I am doing this through ajax. Is it better to do this with ajax or $_SERVER["REQUEST_METHOD"] == "POST"?
<?php
require("../includes/config.php");
$lobby = "steam://joinlobby/730/109775243427128868/76561198254260308";
if (!preg_match("%^((steam?:)+(/joinlobby\/730\/)+([0-9]{17,25}\/.?)+([0-9]{17,25})/$)%i", $lobby)) {
echo "Lobby link isn't formatted correctly.";
}
else {
$rank = "Golden";
$mic = "No";
try {
$stmt=$db->prepare("INSERT INTO created_lobby (lobby_link, current_rank, have_mic) VALUES (:lobby_link, '$rank', '$mic')");
$stmt->execute(array(
':input_link' => $_POST['lobbyLink']
));
}
catch(PDOException $e) {
echo "Error: " . $e->getMessage();
}
}
?>
My Problem:
When I execute this code, it will give me false.
Thank you for help.
This works:
$lobby = "steam://joinlobby/730/109775243427128868/76561198254260308";
if (!preg_match("%^(steam?:)+(//joinlobby/730/)+([0-9]{17,25}/.?)+([0-9]{17,25}$)%i", $lobby)) {
echo "Lobby link isn't formatted correctly.";
}
I changed /joinlobby to //joinlobby, and remove the / at the end. I also removed the unnecessary () around everything.
I suspect you also shouldn't have (...)+ around steam?: and //joinlobby/730/. They'll cause repeated uses of those prefixes to be accepted as correct, e.g. steam:steam:...
I'm not so familiar with PHP but have been able to get a script running that will check if a certain port is open for a number of local network computers.
the downside is that some pc's are offline and I can't get the timeout of the fsockopen function lower then 1 second (0.001 second would be enough)
I've found the *stream_set_timeout* function but can't seem to get it to work.
I'm pretty sure it's just in the wrong place, and hope someone can point out where it should go.
now I get this error:
Warning: stream_set_timeout() expects parameter 1 to be resource,
boolean given
snippet:
$timeout = 1000;
foreach ($farm as $pc){
$check = #fsockopen($pc, $port);
stream_set_timeout($check,0,$timeout);
if (is_resource($check))
{
echo $pc . " online";
fclose($check);
}
else
{
echo $pc . " offline";
}
}
current solution:
foreach ($farm as $pc){
$check = #fsockopen($pc,$port,$errCode,$errStr,0.001);
if (is_resource($check))
{
echo $pc . " online";
fclose($check);
}
else
{
echo $pc . " offline";
}
}
I'm trying to print the host/ip to the screen. But, it's printing: "Resource id #2" instead. I'm using SSH2_connection(). I read the doc page and know the the function parameters are host, port, methods ... but when I try fread($host), the host/ip is still not printing can someone give me some direction on this? Thanks!
Code:
<?php
if (!function_exists("ssh2_connect")) die("function ssh2_connect doesn't exist");
if(!($ssh = ssh2_connect('10.5.32.12', 22))) {
echo "fail: unable to establish connection\n";
} else {
if(!ssh2_auth_password($ssh, 'root', '********')) {
echo "fail: unable to authenticate\n";
} else {
echo "Okay: Logged in ... ";
$content = fread($ssh); //Line in question (want ip address to show here)
echo "$content <br>"; //Line in quesion
$stream = ssh2_exec($ssh, 'find / -name *.log -o -name *.txt');
stream_set_blocking($stream, true);
$data = '';
while($buffer = fread($stream, 4096)) {
$data .= $buffer;
}
fclose($stream);
echo $data; // user
}
}
?>
I believe you need the parenthesis around the variabls as well when using double quotes. "{$content} <br>"
Have you tested with your own debug methods whether the $content variable contains information? You can set a value for the variable to test whether your echo statement is correct syntax.
$content = fread($ssh);
fread() reads from a file and puts the info into a resource handler for use later. I don't think you are using this in the right way currently.
I don't see where $ssh is being defined, but I assume it holds the IP you are wanting to output? If that is the case, just replace
$content = fread($ssh);
With:
echo $ssh;
when I'm trying to getimagesize($img) and the image doesn't exist, I get an error. I don't want to first check whether the file exists, just handle the error.
I'm not sure how try catch works, but I want to do something like:
try: getimagesize($img) $works = true
catch: $works = flase
Like you said, if used on a non-existing file, getimagesize generates a warning :
This code :
if ($data = getimagesize('not-existing.png')) {
echo "OK";
} else {
echo "NOT OK";
}
will get you a
Warning: getimagesize(not-existing.png) [function.getimagesize]:
failed to open stream: No such file or directory
A solution would be to use the # operator, to mask that error :
if ($data = #getimagesize('not-existing.png')) {
echo "OK";
} else {
echo "NOT OK";
}
As the file doesn't exist, $data will still be false ; but no warning will be displayed.
Another solution would be to check if the file exists, before using getimagesize ; something like this would do :
if (file_exists('not-existing.png') &&
($data = getimagesize('not-existing.png'))
) {
echo "OK";
} else {
echo "NOT OK";
}
If the file doesn't exist, getimagesize is not called -- which means no warning
Still, this solution is not the one you should use for images that are on another server, and accessed via HTTP (if you are in this case), as it'll mean two requests to the remote server.
For local images, that would be quite OK, I suppose ; only problem I see is the notice generated when there is a read error not being masked.
Finally :
I would allow errors to be displayed on your developpement server,
And would not display those on your production server -- see display_errors, about that ;-)
Call me a dirty hacker zombie who will be going to hell, but I usually get around this problem by catching the warning output into an output buffer, and then checking the buffer. Try this:
ob_start();
$data = getimagesize('not-existing.png');
$resize_warning = ob_get_clean();
if(!empty($resize_warning)) {
print "NOT OK";
# We could even print out the warning here, just as PHP would do
print "$resize_warning";
} else {
print "OK"
}
Like I said, not the way to get a cozy place in programmer's heaven, but when it comes to dysfunctional error handling, a man has to do what a man has to do.
I'm sorry that raise such old topic. Recently encountered a similar problem and found this topic instead a solution. For religious reasons I think that '#' is bad decision. And then I found another solution, it looks something like this:
function exception_error_handler( $errno, $errstr, $errfile, $errline ) {
throw new Exception($errstr);
}
set_error_handler("exception_error_handler");
try {
$imageinfo = getimagesize($image_url);
} catch (Exception $e) {
$imageinfo = false;
}
This solution has worked for me.
try {
if (url_exists ($photoUrl) && is_array (getimagesize ($photoUrl)))
{
return $photoUrl;
}
} catch (\Exception $e) { return ''; }
Simple and working solution based on other answers:
$img_url = "not-existing.jpg";
if ( is_file($img_url) && is_array($img_size = getimagesize($img_url)) ) {
print_r($img_size);
echo "OK";
} else {
echo "NOT OK";
}