libvips info in phpinfo()

[kleisauke]

To check which version of libvips we're running and which loaders are currently enabled, it would be nice to have some more info about the current vips setup in phpinfo().

For example this is what the GD extension on our server displays:

(Extension source can be found here)

For the vips extension we could do something like this:

(Approximately the same as what you see if you build libvips. I think some info is unnecessary)

[jcupitt]

Here's the equivalent code in php-vips-ext:

https://github.com/jcupitt/php-vips-ext/blob/master/vips.c#L1728

It could certainly be expanded, I agree. Let's tag this as an enhancement.

[jcupitt]

I had a quick hack in this branch:

https://github.com/jcupitt/php-vips-ext/tree/better-php-info

php -i now shows:

vips

vips support => enabled
Major version => 8
Minor version => 5
Micro version => 0
SIMD support with liborc => yes
JPEG support => yes
PNG support => yes
TIFF support => yes
GIF support => yes
OpenEXR support => yes
load OpenSlide => yes
load Matlab => yes
load PDF => yes
load SVG => yes
FITS support => yes
WebP support => yes
load with libMagick => yes
Text rendering support => yes
ICC profile support with lcms => yes

libvips doesn't track the versions of libraries it uses, so yes/no is all we can say at the moment. Is that enough?

[kleisauke]

I think this will be enough for now. We can expand the info in the future (like environment variables such as VIPS_DISC_THRESHOLD or current cache/concurrency settings). Versions of libraries that libvips uses is maybe unnecessary.

Outside the scope of this enhancement, but a nice feature to have, is to change libvips/php-vips settings in the php.ini (like GD does). Not sure how difficult this is to implement.

[jcupitt]

OK, merged to master. Thanks!

Yes, make another enhancement for settings in php.ini.