From 2dda74dfe722e29b19bdc95b63bb44cdf3853cb2 Mon Sep 17 00:00:00 2001
From: Teromene <teromene@teromene.fr>
Date: Tue, 7 Mar 2017 11:46:54 +0000
Subject: [PATCH] Add contribution guidelines.

---
 CONTRIBUTING.md | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 CONTRIBUTING.md

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000..e03f926
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,47 @@
+### Pull request policy
+Fix one issue per pull request.  
+Squash commits before opening a pull request.  
+Respect the coding style policy.    
+Name your PR like the following :
+
+* When correcting a single bridge, use `[BridgeName] Feature`.  
+* When fixing a problem in a specific file, use `[FileName] Feature`.
+* When fixing a general problem, use `category : feature`.
+
+Note that all pull-requests should pass the unit tests before they can be merged.  
+
+### Coding style
+
+Use `camelCase` for variables and methods.  
+Use `UPPERCASE` for constants.  
+Use `PascalCase` for class names. When creating a bridge, your class and PHP file should be named `MyImplementationBridge`.   
+Use tabs for indentation.  
+Add an empty line at the end of your file.  
+
+Use `''` to encapsulate strings, including in arrays.  
+Prefer lines shorter than 80 chars, no line longer than 120 chars.  
+PHP constants should be in lower case (`true, false, null`...)  
+
+
+* Add spaces between the logical operator and your expressions (not needed for the `!` operator).  
+* Use `||` and `&&` instead of `or` and `and`.  
+* Add space between your condition and the opening bracket/closing bracket.  
+* Don't put a space between `if` and your bracket.  
+* Use `elseif` instead of `else if`.  
+* Add new lines in your conditions if they are containing more than one line.  
+*  Example :  
+
+```PHP
+if($a == true && $b) {
+  print($a);
+} else if(!$b) {
+
+  $a = !$a;
+  $b = $b >> $a;
+  print($b);
+
+} else {
+  print($b);
+}
+```
+