PHP exec() not reading output

Question

I have a jar file that writes something to stdout. I need to execute it from PHP and store what it writes.

public class Main{
    public static void main(String[] args) {
        System.out.println("Something...");
    }
}

Unfortunately the following script

<?php
    exec('java -jar Main.jar', $output);
    print_r($output);
?>

always shows that $output is an empty Array().

How do I force the output go to PHP?

TheMirrox · Accepted Answer · 2016-03-26 17:31:14Z

3

Try this approach:

<?php
    exec('java -jar StringGenerator.jar $parameter 2>&1', $output);
    header("Location: /someURL/$output[0]");
?>

2>&1ensures that the output goes to the PHP handler.

answered Mar 26, 2016 at 17:31

TheMirrox

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1 Comment

@M.C. what does the parameter you pass in look like?