added documentation about php.ini variables, and fixed typo in except…

…ion documentation

documentation/exceptions.html

@@ -17,7 +17,7 @@ <h1>Exceptions</h1>
  *  and that divides them. Division by zero is of course
  *  not permitted - it will throw an exception then
  */
-Php::Value myDiv(Php::Parameters &params)
+Php::Value myDiv(Php::Parameters &amp;params)
 {
     // division by zero is not permitted, throw an exception when this happens
     if (params[1] == 0) throw Php::Exception("Division by zero");

documentation/ini.html

@@ -0,0 +1,99 @@
+<h1>Reading php.ini variables</h1>
+<p>
+    Reading settings from the php.ini file(s) is just as simple as it
+    is to obtain these settings from a regular PHP script. Inside a PHP script 
+    you can use the built-in ini_get() function to read settings from the php.ini 
+    file, and in your C++ extension you use the Php::ini_get() function.
+</p>
+<p>
+<pre class="language-c++"><code>#include &lt;phpcpp.h&gt;
+
+/**
+ *  Simple function that is used to demonstrate how settings from the
+ *  php.ini file can be read
+ */
+void myFunction()
+{
+    // read in the "output_buffering" variable from the php.ini file
+    int output_buffering = Php::ini_get("output_buffering");
+
+    // read in the "variables_order" variable
+    std::string variables_order = Php::ini_get("variables_order");
+}
+
+/**
+ *  Switch to C contect so that the get_module() function can be
+ *  called by the Zend engine
+ */
+extern "C" {
+    /**
+     *  The get_module() startup function
+     *  @return void*
+     */
+    PHPCPP_EXPORT void *get_module() {
+
+        // create extension object
+        static Php::Extension extension("my_extension", "1.0");
+
+        // export one function
+        extension.add("myFunction", myFunction);
+
+        // return a pointer to the extension object
+        return extension;
+    }
+}</code></pre>
+</p>
+<p>
+    The Php::ini_get() function returns an object that can be assigned to
+    strings, integers and floating point numbers. In the above example we have
+    used this to assign the settings directly to an integer and a std::string.
+</p>
+<p>
+    You can only retrieve <i>predefined</i> variables from the php.ini. It is thus not 
+    possible to call Php::ini_get() with random strings. If you want to define
+    your own variables, you must first register them in the get_module()
+    function before you can call Php::ini_get() to retrieve the current values.
+</p>
+<p>
+<pre class="language-c++"><code>#include &lt;phpcpp.h&gt;
+
+/**
+ *  Simple function that is used to demonstrate how settings from the
+ *  php.ini file can be read
+ */
+void myFunction()
+{
+    // read in a variable defined for this extension
+    int var1 = Php::ini_get("my_extension.var1");
+
+    // read in a string variable
+    std::string var2 = Php::ini_get("my_extension.var2");
+}
+
+/**
+ *  Switch to C contect so that the get_module() function can be
+ *  called by the Zend engine
+ */
+extern "C" {
+    /**
+     *  The get_module() startup function
+     *  @return void*
+     */
+    PHPCPP_EXPORT void *get_module() {
+
+        // create extension object
+        static Php::Extension extension("my_extension", "1.0");
+
+        // export one function
+        extension.add("myFunction", myFunction);
+
+        // tell the PHP engine that the php.ini variables my_extension.var1
+        // and my_extension.var2 are usable
+        extension.add(Php::Ini("my_extension.var1", "default-value"));
+        extension.add(Php::Ini("my_extension.var2", 12345));
+
+        // return a pointer to the extension object
+        return extension;
+    }
+}</code></pre>
+</p>