[RESOLVED] system calls...

ugasucks

I'd like to write a script that captures the results of a system call and then writes those results to an output file. It's like I'm trying to pipe the output back to my program. I can get the system call to work, but when I view the file the output of the system call is not there.

I'm currently using the following code:

<?php

$fp = fopen("try.txt", "w");
if (!$fp){      echo "it didn't work."; }
fwrite($fp, "foobar");
//test to see if output is occurring on screen
echo system("ls -al | head -2");
//attempt to write the output to file
fwrite($fp, "%s", system("ls -al | head -2 "));
fclose($fp);
?>

What am I doing wrong?

Thanks.

diego25

Check out the exec function instead.

Diego

-Juztin-

if I couldn't get any of that to work I'd proably old school it and redirect the output to a file on the system, then read it back in with php and write it to where i want, delete the temporary file created for capturing the output, and fclose'ing the file that i want to have the output of the command to be finished 😉.

ugasucks

i've thought about that juztin... i just figured that PHP would be able to handle it in a more "new school" way.

BTW, I tried to use exec and I still didn't see the output. Could this be a problem with permissions?

-Juztin-

ugasucks,

this worked for me so you may want to try it:

<?php
$fp = fopen("try.txt", "w");
if (!$fp){ echo "it didn't work."; }
//attempt to write the output to file
fputs($fp, system("ls -al | head -2 "));
fclose($fp);
?>

verification on working🙁my system anyways ;-P)

[root@fireleg justin]# more try.txt
drwxr-xrwx 6 root root 4096 Feb 20 13:12 .
[root@fireleg justin]# more test.php
<?php

$fp = fopen("try.txt", "w");
if (!$fp){ echo "it didn't work."; }
//attempt to write the output to file
fputs($fp, system("ls -al | head -2 "));
fclose($fp);
?>
[root@fireleg justin]# ls -al | head -2
total 36
drwxr-xrwx 6 root root 4096 Feb 20 13:12 .
[root@fireleg justin]#

I ran the test.php file, then more'd the try.txt file it created, then more the test.php file to verify the syntax then ran it on the command line to make sure it had the same result that the file showed... Hope this helps...

-=[Juztin]=- 😉