From PHP 7.0.0, it supports 64-bit architecture. To find if your PHP is 64- bit or not, open PHP info window and search for Architecture.
Also it will be Thread safe OR Non-Thread safe. We can use phpinfo for this one too. Check for thread safety in phpinfo window, If thread safety is disabled then your PHP is Non-Thread safe.
Once you determine the correct PHP Type, download the appropriate dll files from the above mentioned link. Copy and paste it to PHP extension folder. ( In default – C:\Programfiles OR Program Files (x86) \PHP\v7.0\ext )
Once completed, restart your web server.
After restarting, open IIS manager and look for PHP Manager in it. Double click on PHP Manager and open it. Then in right pan you can see a new window called PHP Setup.
If you are opening PHP manager for the first time, then you will see a message. ( red circlein the following image ) . Click on that and enable all.
Then click on ‘Enable OR Disable Extension’ tab and find for php_imagick.dll . Click on it then click Enable button in the right side panel to enable ImageMagic Extension.
Once enabled, restart IIS.
Once completed, open phpinfo page. You will be able to see that imagick module is added with php.