Consider switching to the MIT/BSD license or a dual license otherwise

[sstok]

This library is used extensively in the PHP community, but because it's released under the Apache 2.0 license it's incompatible with GPLv2 and therefor cannot be safely used for all projects.

Most PHP libraries actually use the MIT/BSD or LGPL license, which makes it almost strange for this library to use the Apache 2.0 license.

I wonder if you would consider switching to the MIT/BSD license or use dual (Apache 2.0 / GPL) license instead? @schmittjoh