Unable to load dynamic library php_zmq.dll - The specified module could not be found

Question

I have XAMPP with PHP Version
PHP 7.1.13 (cli) (built: Jan 3 2018 20:16:04) ( ZTS MSVC14 (Visual C++ 2015) x86 ).

I want to install the ZeroMQ extension, which

• I downloaded from here http://pecl.php.net/package/zmq/1.1.3/windows specifically 7.1 Thread Safe (TS) x86
• moved the php_zmq.dll to the file C:\xampp\php\ext, and
• wrote extension=php_zmq.dll into the file C:\xampp\php\php.ini,
• wrote C:\xampp\php\ext in to Windows PATH,

but I still getting this error :

PHP Warning: PHP Startup: Unable to load dynamic library 'C:\xampp\php\ext\php_zmq.dll' - The specified module could not be found. in Unknown on line 0

Warning: PHP Startup: Unable to load dynamic library 'C:\xampp\php\ext\php_zmq.dll' - The specified module could not be found. in Unknown on line 0

What could be the problem?

Answer 1

I did the same as others suggested, but it still did not work. Then I noticed that there is one more .DLL file in the ZMQ ZIP file: libsodium.dll. When I copied this to the C:\xampp\php directory, it worked.

To summarize: files libsodium.dll and libzmq.dll must be copied to C:\xampp\php directory.

Answer 2

I have found out the solution - the libzmq.dll file must be copied / moved to a directory, where the php.exe file is.

So in my case to C:\xampp\php