Cannot load PHP's Event extension php_event.dll on Windows

Question

I've been trying to load the PHP's Event extension on Windows, without success.

I have a Windows 10 Pro 64-bit installed, with PHP v7.1.19 x64 running on IIS. I downloaded the extension "7.1 Non Thread Safe (NTS) x64" from PECL, copied php_event.dll to the extension directory C:\Program Files\PHP\v7.1\ext, and added the extension in php.ini with extension=php_event.dll.

But when I run phpinfo() on my browser, the corresponding event section is not shown (i.e. the extension is not loaded by PHP).

I used Dependency Walker to inspect php_event.dll's dependencies. Every dependency seems to be fine except for PHP7.DLL, which appears in red (with warnings) as shown in the picture below; apparently some function calls are not resolved like _convert_to_string, _ealloc, among others. I don't know if this might be the root of the problem.

I also tried to load the "7.1 Non Thread Safe (NTS) x86" extension in PHP x86 just for comparison, but the problem persists. The only difference is that Dependency Walker shows the PHP7.DLL dependency as normal (without warnings).

I've also tried to load previous versions of the extension, but nothing happens.

Does anyone know how to make PHP to load this extension in this environment?

Answer 1

The sockets extension support must be enabled before the event extension can be installed. The event extension must be loaded after the sockets extension