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setenv LD_LIBRARY_PATH for Matlab in PHP page

Posted on 2006-06-27
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Last Modified: 2016-02-10
I have tried to run a external program on a PHP page, the program requires matlab. I have been struggle to set up the enviromental variables for Matlab.

When I run on UNIX command line:
      setenv LD_LIBRARY_PATH /usr0/local/lib/v73/runtime/glnx86:/usr0/local/lib/v73/sys/os/glnx86:/usr0/local/lib/v73/sys/java/jre/glnx86/jre1.5.0/lib/i386/native_threads:/usr0/local/lib/v73/sys/java/jre/glnx86/jre1.5.0/lib/i386/client:/usr0/local/lib/v73/sys/java/jre/glnx86/jre1.5.0/lib/i386:/usr0/local/lib/v73/bin/glnx86

it works fine.

Here is what I used  on PHP page:

$setEnv = "LD_LIBRARY_PATH=:/lib:/usr0/local/lib/v73/runtime/glnx86:/usr0/local/lib/v73/sys/os/glnx86:/usr0/local/lib/v73/sys/java/jre/glnx86/jre1.5.0/lib/i386/native_threads:/usr0/local/lib/v73/sys/java/jre/glnx86/jre1.5.0/lib/i386/client:/usr0/local/lib/v73/sys/java/jre/glnx86/jre1.5.0/lib/i386:/usr0/local/lib/v73/bin/glnx86 ; export LD_LIBRARY_PATH" . "XAPPLRESDIR=/usr0/local/lib/v73/X11/app-defaults; export XAPPLRESDIR; " . "$runProgram";
shell_exec("$setEnv");

it gives me the following errors, seems like the matlab path wasn't right and the program won't run if it can't find matlab lib.
error while loading shared libraries: libmwmclmcrrt.so.7.3: cannot open shared object file: No such file or directory.

Can somebody please help me on this?
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Question by:yue520
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Expert Comment

by:TeRReF
ID: 16994705
I could be a permission issue. Does the user PHP runs under (i.e. apache user if you run your script from webserver) have permissions to access the libraries?
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Author Comment

by:yue520
ID: 16994934
-rwxr-xr-x  1 root root  20000 Nov 22  2005 libmwmclmcrrt.so.7.3

Is these permission enough for users? sorry, I am new to PHP.
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Expert Comment

by:TeRReF
ID: 16994973
Yep, that should be enough...
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Author Comment

by:yue520
ID: 16994991
any other suggestions?
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LVL 29

Expert Comment

by:TeRReF
ID: 16995064
Try to use system() to execute the setenv command you use on the command line. It should set the environment for the user the script runs under. Then, you should be able to execute the program...
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Author Comment

by:yue520
ID: 16995167
when I use system() with the setenv command from command line, it says:

sh: setenv: command not found
error while loading shared libraries: libmwmclmcrrt.so.7.3: cannot open shared object file: No such file or directory

I wonder why it says it can't find setenv?
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LVL 29

Expert Comment

by:TeRReF
ID: 16995221
Because you need to specify the whole path to setenv...

Do a
locate grep | grep bin
to see where it resides and add the path info to the system() call
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Author Comment

by:yue520
ID: 17001374
can you be specific? I did locate grep | grep bin, but I am not sure what path you are talking about? or what thing I am trying to locate?

Thanks
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Expert Comment

by:TeRReF
ID: 17002098
You will need to find the setenv executable on your system. I'm sorry, I made a mistake. It's:
locate setenv | grep bin

If the listing is very long use this:
locate setenv | grep bin | more

You will have to look for something like:
/usr/bin/setenv or
/usr/local/bin/setenv

Then, use that line in your system() call...


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Author Comment

by:yue520
ID: 17002503
Seems like I don't have setenv, I did a locate, nothing was found. Would there be other way to set up enviroment variable in PHP? since this is not my server.
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Accepted Solution

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TeRReF earned 125 total points
ID: 17002571
You could try putenv()
http://php.net/putenv
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Author Comment

by:yue520
ID: 17003408
That worked. Thanks a million. Hallelujah!
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Expert Comment

by:TeRReF
ID: 17003459
Wow :) You're welcome.
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