Clean up disk space used for old PHP compiles

#1
I've been using OLS for several years on a small Digital Ocean droplet to host my personal weather website.. I always have to compile my PHP within OLS because the in-box versions are not compiled with a couple of flags that I require.. Is it safe to delete some of the contents in the /usr/local/lsws/phpbuild folder once I no longer need them? I have some really old versions in there.

Specifically:
php-x.y.z.tar.gz files (assuming these are the downloaded packages)
php-x.y.z folders (assuming these are the build environments for each version)
buildphp_xxxxxxxxxx.install.sh (script for built)
buildphp_xxxxxxxxxx.log (logfiles for build)

Thanks
 
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