How can I disable the xdebug?

First do

php -i | grep "php.ini"

Then from the grep search, edit the php.ini which it loads.

If it's not in there, you will need to check the conf.d folder (located near your php.ini maybe) for a file called (or similar) ext-xdebug.ini

@bashy Thank you! it was in the xdebug.ini file.

@EliyaCohen Bashy's solution is rather helpful because it is more generic, but for the sake of posterity, the preferred means by which to disable xdebug on Debian (or Ubuntu), which you appear to be using, is:

 php5dismod xdebug

This simply deletes the symbolic links to xdebug.ini (most commonly in /etc/php5/fpm/conf.d and /etc/php5/cli/conf.d).

To renable xdebug, it's the opposite:

 php5enmod xdebug

Conversely, this creates symbolic links for xdebug.ini in the effective conf.d directories (for FPM, CLI, etc.).

It's necessary to restart the PHP daemon (if using one) to render the changes effective.

@cbj4074 True, I always forget about that command. It's good to know how to manually do it though :)

Bashy you are a CHAMP!

This post saved me hours of trial and error.

Thanks so much for your contributions.

I feel so inadequate sometimes when I read your responses.

If you have composer installed via homebrew, and want to keep xdebug installed for your web sessions, here's a way to disable xdebug just for composer:

https://stackoverflow.com/questions/38506140/how-to-run-composer-without-xdebug-when-installed-with-homebrew

In php.ini find zend_extension="path_to\php_xdebug.dll" and comment it out. restart your apache server.