php zeromq extension: Unable to load dynamic library php_zmq.dll

Question

I have XAMPP with PHP Version 5.6.8. I want to install zeromq extension. Tried the following dlls from http://pecl.php.net/package/zmq/1.1.2/windows. Of course I have extension=php_zmq.dll in \xampp\php\php.ini

php_zmq-1.1.2-5.6-nts-vc11-x64
php_zmq-1.1.2-5.6-ts-vc11-x64

php_zmq-1.1.2-5.6-nts-vc11-x86
php_zmq-1.1.2-5.6-ts-vc11-x86

Getting the error

PHP Warning:  PHP Startup: Unable to load dynamic library 
'C:\xampp\php\ext\php_zmq.dll' - %1 is not a valid Win32 application.in 
Unknown on line 0

Answer 1

Here is the dll worked for php 5.6.3. Details are in readme file

https://github.com/kirensiva/zmqPHPVersion5.6.3

Answer 2

I finally got it working: Download the http://pecl.php.net/package/zmq/1.1.2/windows "5.6 Thread Safe (TS) x86" version.

Copy the php_zmq.dll to php/ext directory

Then copy the libzmq.dll to the xamp/ root directory

RESTART apache.