Development on mobile platforms has grown considerably and the Android operating system built by Google is one of those that has registered the greatest growth, which is why it has attracted the attention of many developers and every day more tools appear that help adopt the platform.
The PHP for Android project is a project that seeks to allow the use of PHP to build applications for Android, basically what the project does is offer support for PHP to the ASE (Android Scripting Framework) a project maintained by Google that allows us to run scripts directly on Android.
Official project site: http://phpforandroid.net/