diff --git a/assets/templates/_table_of_contents.phtml b/assets/templates/_table_of_contents.phtml
index c6d9ad9..a0e2e0c 100644
--- a/assets/templates/_table_of_contents.phtml
+++ b/assets/templates/_table_of_contents.phtml
@@ -15,6 +15,7 @@
Classes: Inheritance
Classes: Visibility
Classes: Constructor
+ Static
Credits
diff --git a/code/static.php b/code/static.php
new file mode 100644
index 0000000..1050bcc
--- /dev/null
+++ b/code/static.php
@@ -0,0 +1,70 @@
+color = $color;
+ }
+}
+
+// Like building a house, a class is a blueprint that
+// defines what the house can do and the object is the house itself that can actually
+// perform the actions defined in the blueprint.
+$house = new House('Green');
+
+// However, what if you want the blueprint to have properties and methods?
+// That is when you use the "static" keyword. In this class, we will define a default color
+// on the class itself and then use it when creating a new object.
+class Skyscraper
+{
+ private static $popularColor;
+ public $color;
+
+ public static function setDefaultColor($color)
+ {
+ self::$popularColor = $color;
+ }
+
+ public function __construct()
+ {
+ $this->color = self::$popularColor;
+ }
+}
+
+// You can access static methods and properties using double colons on "self" inside the object
+// or on the class name outside of the object. Static methods and properties can only access
+// other static methods and properties.
+Skyscraper::setDefaultColor('Grey');
+$skyscraper = new Skyscraper();
+echo $skyscraper->color . "\n";
+
+// Often, you will see static constructors in PHP.
+// A static constructor creates a new instance of an object. Why would do that when you just use "new Class" to create
+// a new object? The most common reason is to make the code more readable.
+class TinyHouse
+{
+ private $color;
+ private $wheels;
+ private $trailer;
+
+ public static function build($color, $wheels, $trailer)
+ {
+ return new self($color, $wheels, $trailer);
+ }
+
+ public function __construct($color, $wheels, $trailer)
+ {
+ $this->color = $color;
+ $this->wheels = $wheels;
+ $this->trailer = $trailer;
+ }
+}
+
+// Using "build" can make more sense than "new", but it is ultimately a personal choice.
+$house = TinyHouse::build('Blue', 4, true);
diff --git a/config.php b/config.php
index e584669..f4359eb 100644
--- a/config.php
+++ b/config.php
@@ -87,6 +87,12 @@ return [
'title' => 'Classes: Constructor',
'subtitle' => 'Construct your objects',
'previous' => 'classes-visibility',
+ 'next' => 'static',
+ ]),
+ Page::create('static', null, 'static.php', [
+ 'title' => 'Static',
+ 'subtitle' => 'Adding properties and functions to the blueprint',
+ 'previous' => 'classes-constructor',
'next' => '',
]),
],