David 9fbe186098 Added argument parsing for functions (#6) ... * Moved not required argument logic into function Seemed more logical, as you can't have a required argument after the not required argument. Usage: ```rs FunctionBuilder::new("skeleton_version", skeleton_version) .arg(Arg::new("req_arg1", DataType::String)) .arg(Arg::new("req_arg1", DataType::String)) .not_required() .arg(Arg::new("not_req_arg1", DataType::String)) .build() ``` * Added zend_value implementation Helper functions to retrieve the value from zvals * Started work on argument parser * Added PHP version support notice Due to the way the Zend API changes and the fact that the stable interface is exposed via C macros, there is no support for versions lower than PHP 8.0. In the future we can support PHP 7.4 through Rust features. * Added TryFrom implementations for Zval -> Types * Added ability to select arguments from ExecutionData * Added ability to parse arguments and retrieve val See `example/skel/src/lib.rs` for usage.		2021-03-10 19:50:44 +13:00
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skel	Added argument parsing for functions (#6)	2021-03-10 19:50:44 +13:00