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, Jun 21 '13 at 10:42
@Florent I have migrate to Symfony 2.3.3 but unfortunately i have the same error. — Serge Kvashnin, Aug 14 '13 at 09:55
Try to change `minimum-stability` to `alpha` and then run `composer update`. **You're vendors seems to be outdated.** — Florent, Aug 14 '13 at 11:36

Serge Kvashnin · Accepted Answer · 2015-12-08T17:35:03.113

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 08 '15 at 17:35

answered Aug 15 '13 at 12:24

Serge Kvashnin

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Undefined variable $output in Symfony Component Console DialogHelper

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