From f253100c61cbf778d7de1228b75508c87b7f5d3d Mon Sep 17 00:00:00 2001
From: Biromain <romain.bijakowski@gmail.com>
Date: Fri, 29 Sep 2017 10:13:40 +0200
Subject: [PATCH] Signature example for PHP

---
 examples/signature.php | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 examples/signature.php

diff --git a/examples/signature.php b/examples/signature.php
new file mode 100644
index 00000000..af8b6a72
--- /dev/null
+++ b/examples/signature.php
@@ -0,0 +1,30 @@
+<?php
+
+$key = '943b421c9eb07c830af81030552c86009268de4e532ba2ee2eab8247c6da0881';
+$salt = '520f986b998545b4785e0defbc4f3c1203f22de2374a3d53cb7a7fe9fea309c5';
+
+$keyBin = pack("H*" , $key);
+if(empty($keyBin)) {
+	die('Key expected to be hex-encoded string');
+}
+
+$saltBin = pack("H*" , $salt);
+if(empty($saltBin)) {
+	die('Salt expected to be hex-encoded string');
+}
+
+$resize = 'fill';
+$width = 300;
+$height = 300;
+$gravity = 'no';
+$enlarge = 1;
+$extension = 'png';
+
+$url = 'http://img.example.com/pretty/image.jpg';
+$encodedUrl = rtrim(strtr(base64_encode($url), '+/', '-_'), '=');
+
+$path = sprintf("/%s/%d/%d/%s/%d/%s.%s", $resize, $width, $height, $gravity, $enlarge, $encodedUrl, $extension);
+
+$signature = rtrim(strtr(base64_encode(hash_hmac('sha256', $saltBin.$path, $keyBin, true)), '+/', '-_'), '=');
+
+print(sprintf("/%s%s", $signature, $path));
\ No newline at end of file