When I reach the environmental checks page, I get this:
PHP 7.0.27 is installed.
Warning: Could not find APCu, XCache or WinCache.
Object caching is not enabled.
GNU diff3 not found.
Could not find GD library or ImageMagick.
Image thumbnailing will be disabled.
Git version control software not found.
The only true statement there is that PHP 7.0.27 is indeed installed. However, it is correctly configured with APCu, Zend OpCache, diff3, and ImageMagick. I run separate software that utilizes all these extensions just fine; somehow, MediaWiki can't find them.
The only setting in LocalSettings.php that seems to reference an extension is:
$wgImageMagickConvertCommand = '/usr/bin/convert';
... and that indeed is the path to imagick.
Any ideas what I'm doing wrong here?
Scott