troubleshooting Question

Calling shell_exec shows weird behavior from php

Avatar of Sreejith22
Sreejith22Flag for India asked on
14 Comments1 Solution630 ViewsLast Modified:
Following php code works and I get output:


echo 'hello world';
echo shell_exec('ls -la');


// Output
hello worldtotal 2064 drwxrwxrwx. 3 root root 4096 Jul 4 10:26 . drwxr-xr-x. 4 root root 4096 Jul 4 10:17 .. -rw-rw-r--. 1 arun arun 2089447 Jul 3 11:09 -rw-r--r--. 1 root root 32 Jun 18 18:01 info.php drwxrwxrwx. 7 arun arun 4096 Jul 3 12:23 nykkos -rw-r--r--. 1 arun arun 76 Jul 4 10:26 test.php

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The following code does not work:


echo 'hello world';
echo shell_exec("java -jar /var/www/html/nyk/app/webroot/Converter.jar $id");


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It just shows a blank white screen. Even the simple java -version when used in the above php code gives a blank screen. Even the 'hello world' does not get printed.

Whereas the java commands discussed above work without any issues from terminal. My OS is fedora. It works fine in ubuntu!!

What is the reason behind this strange behaviour and how can I overcome the same?

Any help is much appreciated.
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