Error: Firefox - Content Encoding Error / Google Chrome - Error 330 (net::ERR_CONTENT_DECODING_FAILED): Unknown error.

When you open a PHP page in your Firefox, you get the following error:

Content Encoding Error

The page you are trying to view cannot be shown because it uses an invalid or unsupported form of compression.

* Please contact the website owners to inform them of this problem.

In Google Chrome, you get the following error:

Error 330 (net::ERR_CONTENT_DECODING_FAILED): Unknown error.

Solution

The solution is to turn on zlib.output_compression in your php.ini.

Open your php.ini. On Debian/Ubuntu, it's /etc/php5/apache2/php.ini:

vi /etc/php5/apache2/php.ini

On Fedora/CentOS/RedHat, it's /etc/php.ini:

vi /etc/php.ini

Find the zlib.output_compression line and turn zlib.output_compression on:

zlib.output_compression = On

Restart Apache afterwards:

On Debian/Ubuntu, you run:

/etc/init.d/apache2 restart

On Fedora/CentOS/RedHat, you run:

/etc/init.d/httpd restart