Undefined variable $output in Symfony Component Console DialogHelper

Question

I tried to run symfony console command, but I've got an error:

Notice: Undefined variable: output in /var/www/.../vendor/symfony/symfony/src/Symfony/Component/Console/Helper/DialogHelper.php line 411

I have no idea, why it went wrong.

Can anyone help?

Maybe i'll try later, because i have many deprecated methods, which Symfony 2.3 not support. — Serge Kvashnin
– Serge Kvashnin, Commented Jun 21, 2013 at 10:42
@Florent I have migrate to Symfony 2.3.3 but unfortunately i have the same error. — Serge Kvashnin
– Serge Kvashnin, Commented Aug 14, 2013 at 9:55
Try to change minimum-stability to alpha and then run composer update. You're vendors seems to be outdated. — Florent
– Florent, Commented Aug 14, 2013 at 11:36

Serge Kvashnin · Accepted Answer · 2015-12-08 17:35:03Z

3

I've solved the problem: this error appears because exec() and shell_exec functions was disabled in php.ini file. To enable this functions you have to edit this string:

disable_functions =exec,passthru,shell_exec,system,proc_open

and delete exec, shell_exec:

disable_functions =passthru,system,proc_open

edited Dec 8, 2015 at 17:35

answered Aug 15, 2013 at 12:24

Serge Kvashnin

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