I'm writing a bash script meant to run on a remote AMP stack. The script needs to access a PHP predefined environment variable ($_ENV).
This is what I want:
db_host=$(php -r 'echo $_ENV{DATABASE_SERVER};')
echo "The DB Host is: $db_host"
# output: "The DB Host is: internal-db.s173785.gridserver.com"
This is what I get instead:
# METHOD 1
db_host1=$(php -r 'echo $_ENV{DATABASE_SERVER};')
echo "The DB Host is: $db_host1"
# output: "The DB Host is: "
# METHOD 2
db_host2=`php -r 'echo get_env(DATABASE_SERVER);'`
echo "The DB Host is: $db_host2"
# output: "The DB Host is: "
Neither method works, both variables return empty. I know that this PHP variable is set, because when I type this into the terminal (after ssh'ing into the server), I get the expected value:
$ php -r 'echo $_ENV{DATABASE_SERVER};'
# outputs: "internal-db.s173785.gridserver.com"
Technically the above methods should work, because I managed to get this working in my script:
php_user=$(php -r 'echo getenv("USER");')
echo php_user is $php_user
# outputs: "php_user is myusername"
Anyone know what I am doing wrong?\\
***UPDATE*******
I should mention that I am invoking this script from my local machine like so:
ssh -t user@mydomain.com "myscript backup_remote_db"
"myscript" is the name of my executable bash script, and "backup_remote_db" is the function I'm passing to it which contains the code above.
This might not be cause however, because when I echo $USER in the script, it echoes the remote user, not the local one...
***UPDATE 2******
Here is how I finally got it working:
db_host=$DATABASE_SERVER
echo "The DB Host is $db_host"
# output: "The DB Host is: internal-db.s173785.gridserver.com"
But only if I make this adjustment to how the script is invoked:
ssh -t user@mydomain.com ". /etc/profile; myscript backup_remote_db"
You don't need php for get environment variables in your shell
Just print it:
echo "The DB Host is $DATABASE_SERVER"
And for full answer, I assume, that php doesn't work because you get notice Use of undefined constant PATH
, you should wrap your string arguments.
This should work:
v=$(php -r 'print_r(getenv("DATABASE_SERVER"));')
echo "DB: $v"
Update: .bashrc is not sourced when you log in using SSH. You need to source it in your .bash_profile like this:
if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi
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