From 21390884d137cad6113a4e8bf4d4755fb89d0f56 Mon Sep 17 00:00:00 2001
From: Nicolas Far <nfar@hexacta.com>
Date: Fri, 17 May 2019 19:14:20 -0400
Subject: [PATCH] PHP to rust FFI example

---
 php-to-rust/Cargo.toml  |  8 ++++++++
 php-to-rust/Makefile    | 14 ++++++++++++++
 php-to-rust/README.md   |  5 +++++
 php-to-rust/src/ffi.php |  9 +++++++++
 php-to-rust/src/lib.rs  |  5 +++++
 5 files changed, 41 insertions(+)
 create mode 100644 php-to-rust/Cargo.toml
 create mode 100644 php-to-rust/Makefile
 create mode 100644 php-to-rust/README.md
 create mode 100644 php-to-rust/src/ffi.php
 create mode 100644 php-to-rust/src/lib.rs

diff --git a/php-to-rust/Cargo.toml b/php-to-rust/Cargo.toml
new file mode 100644
index 0000000..1ffedf0
--- /dev/null
+++ b/php-to-rust/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "php-to-rust"
+version = "0.1.0"
+authors = ["Nicolas Far <nicofff@gmail.com>"]
+
+[lib]
+name = "double_input"
+crate-type = ["dylib"]
diff --git a/php-to-rust/Makefile b/php-to-rust/Makefile
new file mode 100644
index 0000000..294df52
--- /dev/null
+++ b/php-to-rust/Makefile
@@ -0,0 +1,14 @@
+ifeq ($(shell uname),Darwin)
+    EXT := dylib
+else
+    EXT := so
+endif
+
+all: target/debug/libdouble_input.$(EXT)
+	php src/ffi.php
+
+target/debug/libdouble_input.$(EXT): src/lib.rs Cargo.toml
+	cargo build
+
+clean:
+	rm -rf target
diff --git a/php-to-rust/README.md b/php-to-rust/README.md
new file mode 100644
index 0000000..2ac9a99
--- /dev/null
+++ b/php-to-rust/README.md
@@ -0,0 +1,5 @@
+PHP 7.4 is needed
+
+At time of writing, that means [compiling from source](https://github.com/php/php-src#building-php-source-code). 
+
+Make sure to pass --with-ffi as a parameter to ./configure
\ No newline at end of file
diff --git a/php-to-rust/src/ffi.php b/php-to-rust/src/ffi.php
new file mode 100644
index 0000000..65c56fe
--- /dev/null
+++ b/php-to-rust/src/ffi.php
@@ -0,0 +1,9 @@
+<?php
+
+$libExtension = (PHP_OS_FAMILY == "Darwin" ? 'dylib' : 'so');
+
+$ffi = FFI::cdef(
+    "int32_t double_input(int32_t input);",
+    "target/debug/libdouble_input.$libExtension");
+var_dump($ffi->double_input(3));
+?>
diff --git a/php-to-rust/src/lib.rs b/php-to-rust/src/lib.rs
new file mode 100644
index 0000000..2819ff1
--- /dev/null
+++ b/php-to-rust/src/lib.rs
@@ -0,0 +1,5 @@
+#[no_mangle]
+pub extern fn double_input(input: i32) -> i32 {
+    input * 2
+}
+