Add feature to convert anyhow errors to PHP exceptions

Cargo.toml

@@ -15,6 +15,7 @@ exclude = ["/.github", "/.crates", "/guide"]
 bitflags = "1.2.1"
 parking_lot = "0.11.2"
 cfg-if = "1.0"
+anyhow = { version = "1", optional = true }
 ext-php-rs-derive = { version = "=0.7.1", path = "./crates/macros" }
 
 [build-dependencies]

README.md

@@ -115,6 +115,15 @@ See the following links for the dependency crate requirements:
 - [`cc`](https://github.com/alexcrichton/cc-rs#compile-time-requirements)
 - [`bindgen`](https://rust-lang.github.io/rust-bindgen/requirements.html)
 
+## Cargo Features
+
+All features are disabled by default.
+
+- `closure` - Enables the ability to return Rust closures to PHP. Creates a new
+  class type, `RustClosure`.
+- `anyhow` - Implements `Into<PhpException>` for `anyhow::Error`, allowing you
+  to return anyhow results from PHP functions. Supports anyhow v1.x.
+
 ## Usage
 
 This project only works for PHP >= 8.0 (for now). Due to the fact that the PHP

src/exception.rs

@@ -78,6 +78,13 @@ impl From<&str> for PhpException {
     }
 }
 
+#[cfg(feature = "anyhow")]
+impl From<anyhow::Error> for PhpException {
+    fn from(err: anyhow::Error) -> Self {
+        Self::new(err.to_string(), 0, crate::zend::ce::exception())
+    }
+}
+
 /// Throws an exception with a given message. See [`ClassEntry`] for some
 /// built-in exception types.
 ///