Php exec with Java

Question

I have a working exec("java $file") command in php, but the problem is that I'm not sure how to get standard output from a java program.

I realize that there is a second parameter (for example, exec("java $file", $output) ) but that doesn't seem to return output from a java program.

For example, if I have a java program with just a println("Hello World") in it, how can I get that output through exec() in php?

Thanks!

ThiefMaster · Accepted Answer · 2010-11-22 02:48:23Z

1

From the docs:

string exec ( string $command [, array &$output [, int &$return_var ]] )

If the output argument is present, then the specified array will be filled with every line of output from the command

Example:

exec('java ' . $file, $output);
print_r($output);

answered Nov 22, 2010 at 2:48

ThiefMaster

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Comments

CodeGuy · Accepted Answer · 2010-11-22 02:47:26Z

1

nevermind. Okay, it works. You must run a print_r on the output to print the array, then you will see standard output.

answered Nov 22, 2010 at 2:47

CodeGuy

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print_r is just a print statement that works with arrays and objects as well as strings. It doesn't do anything to $output, it was always working.

SingleNegationElimination · Accepted Answer · 2010-11-22 02:47:41Z

0

You probably want to be using popen() or the even more general proc_open()

answered Nov 22, 2010 at 2:47

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