I have PHP file which has logic based on which I run either

bin/phpunit -c Application/app --testsuite $TESTSUITE


bin/phpunit -c Application/app --group group1 group2

when Im doing


COMMAND=$(php travis_groups.php)
echo $COMMAND //bin/phpunit -c Application/app --testsuite $TESTSUITE

Nothing happens but when I paste the command to sh file it works.

Why I can't I execute a command which is generated by a PHP script?



  • Is PHP in your $PATH?
    – Jay
    Aug 27, 2015 at 13:32

1 Answer 1


By COMMAND=$(php travis_groups.php) you just assign the command to COMMAND variable. If you want to run the command, you need to add $COMMAND after the assignment.

Simple example setup:

echo.sh file containing just line echo "ls"

run_echoed.sh file containing two lines:

COMMAND=$(bash echo.sh)

When you run run_echoed.sh (either by ./run_echoed.sh if the file is executable or bash run_echoed.sh), you print the directory contents (the ls command gets executed).

Of course make sure your php travis_groups.php actually prints out the commands (just run in the terminal). Otherwise you can't tell the other script what to assign to the variable.

  • Please look at my post I have add missing code Aug 27, 2015 at 13:41
  • So, to make it clear after your edit: echo $COMMAND returns the command all right, but running $COMMAND does nothing? Also, the line echo $COMMAND //bin/phpunit -c Application/app --testsuite $TESTSUITE is the actual line in your script?
    – Adalee
    Aug 27, 2015 at 13:56

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