How do you install Libevent for PHP?

Question

I installed the libevent-dev library on my Debian 7 64bit desktop:

$ sudo aptitude install -y libevent-dev

Then I installed the PECL library

$ pecl list
Installed packages, channel pecl.php.net:
=========================================
Package  Version State
libevent 0.1.0   beta

I've restarted PHP and the OS but PHP doesn't list libevent as an installed ext in with phpinfo() and I get "PHP Fatal error: Call to undefined function event_base_new()" when I try to use it.

How do you install Libevent?

Answer 1

Install Libevent for PHP 5.X

sudo apt-get install libevent-dev
sudo pecl install libevent-beta

sudo su
sudo echo 'extension=libevent.so' > /etc/php5/mods-available/libevent.ini
exit

sudo ln -s /etc/php5/mods-available/libevent.ini /etc/php5/fpm/conf.d/
sudo ln -s /etc/php5/mods-available/libevent.ini /etc/php5/cli/conf.d/

sudo service php5-fpm restart

Install Libevent for PHP 7.X

At this time pecl package libevent is not available for php 7

https://pecl.php.net/package/libevent

So let's compile it.

Download master: https://github.com/expressif/pecl-event-libevent

Unpack to: /tmp/install_libevent

cd /tmp/install_libevent/pecl-event-libevent-master
sudo phpize
sudo ./configure

After this step scroll our console window and try find any Warnings or Errors. I got one warning - required to install re2c package.

sudo make
sudo make install

sudo su
sudo echo 'extension=libevent.so' > /etc/php/7.0/mods-available/libevent.ini
exit

sudo ln -s /etc/php/7.0/mods-available/libevent.ini /etc/php/7.0/fpm/conf.d/20-libevent.ini
sudo ln -s /etc/php/7.0/mods-available/libevent.ini /etc/php/7.0/cli/conf.d/20-libevent.ini

sudo service php7.0-fpm restart