I want to run a simple shell command, say:
dir > bau.txt
Using php:
$cmd = escapeshellcmd ('dir > bau.txt');
shell_exec($cmd);
But it does not work (bau.txt stays empty).
Is there any reason for that?
A normal $cmd would work (say just 'dir').
This seems like a similar scenario:
How to run multiple commands in system, exec or shell_exec?
Essentially when you use the > operator, you're piping your standard output to the file you've specified. It seems that shell_exec doesn't directly support piping, but rather, the output needs to be stored from shell_exec and then run through shell_exec with the next command.
Related
I'm using system() and shell_exec() but it seems that this funcions use /bin/sh always. I want to use another shell when I call this functions: bash or zsh. Is it possible?
What's the point? If you use system to start another shell script, that shell script itself can decide (via its #! line) which shell it is supposed to be processed by. Aside from this, you can always explicitly call the shell. For instance, if you want to take advantage of globbing operators specific to zsh or specific zsh builtins, you can do a
# Produce list of files including hidden files. Use
# the zsh-builtin command instead of /usr/bin/echo :
system('zsh -c "echo *(DN)"')
One solution can be:
<?php
\system('bash -c "here your command"');
or
<?php
\system('zsh -c "here your command"');
i have 2 shell commands and i want to exec in php the first command that act like an application and stay into it and exec another command there (in this application).
i write in my shell: wpa_cli
and get the result:
Interactive mode
>
now i can write commands in that software, like:
Interactive mode
> status
and get the result:
wpa_state=DISCONNECTED
p2p_device_address=34:b1:f7:1f:2d:bb
address=34:b1:f7:1f:2d:bb
>
my problem is that i want to do that outside the shell by php.
how can i do that?
Your requirement is similar to this interactive shell using PHP, but it requires execution of PHP script in terminal, which you don't want.
So, in this case, you can use any of these php functions: shell_exec, exec, system or passthru and run both wpa_cli status commands together, you will get the required result.
e.g. run the following script in your php file and see the output,
echo '<pre>'. shell_exec('wpa_cli status') .'</pre>';
You can also use PHP Ajax Shell or similar scripts to execute your commands and get response on the same page without reloading it.
I have to design a interface using PHP for a software written in python. Currently this software is used from command line by passing input, mostly the input is a text file. There are series of steps and for every step a python script is called. Every step takes a text file as input and an generates an output text file in the folder decided by the user. I am using system() of php but I can't see the output but when I use the same command from command line it generates the output. Example of command :
python /software/qiime-1.4.0-release/bin/check_id_map.py -m /home/qiime/sample/Fasting_Map.txt -o /home/qiime/sample/mapping_output -v
try this
$script = 'software/qiime-1.4.0-release/bin/check_id_map.py -m /home/qiime/sample/Fasting_Map.txt -o /home/qiime/sample/mapping_output -v';
$a = exec($script);
If you are not on windows, have you tried adding 2>&1 (redirect stderr to stdout) to the end of the command?
$output = system("python /software/qiime-1.4.0-release/bin/check_id_map.py -m /home/qiime/sample/Fasting_Map.txt -o /home/qiime/sample/mapping_output -v 2>&1", $exitcode);
Found from http://www.php.net/manual/en/function.system.php#108713
Also the doc says that it
Returns the last line of the command output on success, and FALSE on
failure.
So if you are trying to get multiple lines, you may need to redirect it to a file and read that in.
instead of system() try surrounding the code in `ticks`...
It has a similar functionality but behaves a little differently in the way it returns the output..
I'm writing a class who let me access to recutils through PHP.
I have a 'database' file called books.rec in ../database/ and a script who runs my Recutils.php class.
My class simply launch system application with correct parameters.
But When I try to use recins with PHP's exec function, the command doesn't work will it work in command line.
This is the command that is executed by my script :
recins -f Title -v "Moi" -f Author -v "Moche" -f Location -v "loaned" -t Books ../database/books.rec
With PHP : Nothing, the record is not inserted (no error message at all too).
In terminal : OK, the command is well done and my record is inserted.
I also have a method to do a select operation using recsel and it works very well, will it use exactly the same file (and runs from exec too).
So, could someone explain me why the command don't work will another with the same file work ?
Thanks
PS : Further informations : http://www.gnu.org/software/recutils/
I would double check that you are running the command as the same user from the command line and your php script. That may be the problem. exec('whoami')
You said you had a script that starts your php script it should be the same user as that.
You might also want to running a simpler exec command to see if that will work first.
Other things to try:
Try checking stderr output exec('ls /tmp 2>&1', $out); This will redirect standard error to standard out so you get both.
Try using php's shell_exec() which will invoke a shell just like when you are running from the command line(eg. bash). shell_exec('ls /tmp 2>&1 >> /tmp/log') should even put all output into a log file.
I don't think this will help you but it is something to try if all else fails, set it as a background process and see if it completes. exec('nohup php process.php > process.out 2> process.err < /dev/null &'). The & will set the command to run in the background and let the script continue.
Good Luck
Is recins command accessible for PHP ? Also is path to books.rec correct ?
Try with absolute path.
I am trying to invoke a script which takes several seconds (web services with 3rd party) using the PHP exec call. After much struggling, I reduced this to the classic hello world example. The calling script looks like:
exec('/usr/bin/php /home/quote2bi/tmp/helloworld.php > /tmp/execoutput.txt 2>&1 &');
When I run this, the output execoutput.txt contains a copy of the invoking script page, not hello world as I expected.
Why can't I get this PHP script to execute using exec? Note that when I change the command to something like ls -l, the output is a directory listing as expected. btw, in case it matters, I did chmod the called script to 755...
Update - I moved the exec call to the end of the calling script and at least now I don't see the calling script executed in the output. Thx to posters and I will try some of these ideas.
Help!
Thanks
Steve
I had this issue also and it turns out this is a bug in php (#11430). The fix is to use php-cli when calling another php script within a php script. So you can still use exec but rather than use php use php-cli when calling it in the browser:
exec("php-cli somescript.php");
This worked for me.
What exec is doing is taking the rightmost command and appending it to your destination. If you have the shebang line in your php script, you shouldn't need to include the binary directive of the php interpreter.
if you just want the script's output, try:
exec('/home/quote2bi/tmp/helloworld.php > /tmp/execoutput.txt 2>&1 &')
however if you do not want the errors to be in the file, you should redirect the STDERR prior to outputting to the file. Like so:
exec('/home/quote2bi/tmp/helloworld.php 2> /dev/null > /tmp/execoutput.txt')
the above should only output the "Hello World" to the execoutput.
Edit:
Interesting you are getting this behaviour. You stated the command "ls" worked. Try making an alias for this and forward it to a file like so:
alias pexec='php /home/quote2bi/tmp/helloworld.php'
then
exec('pexec > /tmp/execoutput.txt 2>&1 &')
it seems to be a problem with the way exec handles input as opposed to the shell itself.
-John
The problem is with PHP itself, it treats everything as $argv in the script. It doesn´t redirect the output to a file ou to /dev/null.
I faced the same problem some time ago. What I did is to create a runscript.php in /opt/php-bin and then inside this script run what It should be running. Something like this:
$script = $argv[1]
$params = implode(' ', array_slice($argv, 2));
$cmd = "{$script} {$params} > /dev/null &";
$output = array();
$return = 0;
exec("php {$cmd}", $output, $return);
exit((int)$return);
And then you call it using:
exec('/opt/php-bin/runscript.php /path/to/your/script.php arg1 arg2')
It´s the only way I managed to get this working.
To avoid the stated problems of PHP in this area, why not put this in inside a shell script? PHP can then execute the shell script which has all the redirections handled internally.
If you need to dynamically change things, then why not write the shell script and then execute it (and of course, clean up afterwards)?
if you are just simply running a php script one possible way to execute the entire code is to use the include() that will run the php file and output any results. You cannot direct the output to a text file but it should appear in the browser window if you're Hello World php script looks like
<?php echo "Hello World!"; ?>
then it will spit that out in the browser. So your second code would look like
<?php include("helloWorld.php"); echo " PHP ROCKS";?>
resulting in a page that would look like,
Hello world! PHP ROCKS
This runs as if you run the script from browser.
This came across while working on a project on linux platform.
exec('wget http://<url to the php script>)
Hope this helps!!