PHP version 5.2.11 or later is required.
The libxml and curl extensions must also be enabled for the Apache Solr extension to be available.
libxml2 2.6.31 or later is required.
libcurl 7.18.0 or later is also required.
The above library versions are required and attempting to hack the code to make it compile is strongly discouraged. It will fail, possibly with errors that could be hard to debug
For help and support, please visit the extension google group. » Apache Solr PHP Extension
Windows binaries (DLL files) for this PECL extension are available from the PECL website.
The solr module can be compiled in debug mode by passing the --enable-solr-debug flag to configure
When building manually, be sure to include curl and libxml support within the build.