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   This is an extension to efficiently schedule I/O, time and signal based
   events using the best I/O notification mechanism available for specific
   platform. This is a port of libevent to the PHP infrastructure.
  
  Note: 
   
    Note, Windows support introduced in
    event-1.9.0
    .
   
  
  
   Version
   1.0.0
   introduces new object-oriented API (breaking backwards compatibility), and
   support of libevent 2+ including HTTP, DNS, OpenSSL and the event listener.
  
  Note: 
   
    Note,
    event-1.0.0
    and greater is not compatible with previous versions.
   
  
  
 
  
User Contributed Notes
 
  
  
   AoK
   16-May-2014 04:06
   
    
PHP event service works at PHP 5.4+.  Couldn't get event to work on a PHP 5.3.10 install.
To get event working (OS X as an example):
1. brew install libevent
2. sudo pecl install event
This is tricky because pecl yields both "event" and "libevent" packages.  I was successful with "event" and not "libevent".