adding simple classes

week-15/simple-classes/Rectangle.php

+<?php # Script 4.5 - Rectangle.php
+/*	This page defines the Rectangle class.
+ *	The class contains two attributes: width and height.
+ *	The class contains five methods: 
+ *	- __construct()
+ *	- setSize()
+ *	- getArea()
+ *	- getPermeter()
+ *	- isSquare()
+ */
+ 
+class Rectangle {
+
+	// Declare the attributes:
+	public $width = 0;
+	public $height = 0;
+
+	// Constructor:
+	function __construct($w = 0, $h = 0) {
+		$this->width = $w;
+		$this->height = $h;
+	}
+	
+	// Method to set the dimensions:
+	function setSize($w = 0, $h = 0) {
+		$this->width = $w;
+		$this->height = $h;
+	}
+	
+	// Method to calculate and return the area:
+	function getArea() {
+		return ($this->width * $this->height);
+	}
+	
+	// Method to calculate and return the perimeter:
+	function getPerimeter() {
+		return ( ($this->width + $this->height) * 2 );
+	}
+	
+	// Method to determine if the rectange 
+	// is also a square.
+	function isSquare() {	
+		if ($this->width == $this->height) {
+			return true; // Square
+		} else {
+			return false; // Not a square
+		}
+		
+	}
+
+} // End of Rectangle class.
\ No newline at end of file

week-15/simple-classes/Rectangle1.php

+<?
+ 
+class Rectangle {
+
+	// Declare the attributes:
+	public $width = 0;
+	public $height = 0;
+
+	// Method to set the dimensions:
+	function setSize($w = 0, $h = 0) {
+		$this->width = $w;
+		$this->height = $h;
+	}
+	
+	// Method to calculate and return the area:
+	function getArea() {
+		return ($this->width * $this->height);
+	}
+	
+	// Method to calculate and return the perimeter:
+	function getPerimeter() {
+		return ( ($this->width + $this->height) * 2 );
+	}
+	
+	// Method to determine if the rectange 
+	// is also a square.
+	function isSquare() {	
+		if ($this->width == $this->height) {
+			return true; // Square
+		} else {
+			return false; // Not a square
+		}
+		
+	}
+
+} // End of Rectangle class.

week-15/simple-classes/Rectangle2.php

+<?
+ 
+class Rectangle {
+
+	// Declare the attributes:
+	public $width = 0;
+	public $height = 0;
+
+	// Constructor:
+	function __construct($w = 0, $h = 0) {
+		$this->width = $w;
+		$this->height = $h;
+	}
+	
+	// Method to set the dimensions:
+	function setSize($w = 0, $h = 0) {
+		$this->width = $w;
+		$this->height = $h;
+	}
+	
+	// Method to calculate and return the area:
+	function getArea() {
+		return ($this->width * $this->height);
+	}
+	
+	// Method to calculate and return the perimeter:
+	function getPerimeter() {
+		return ( ($this->width + $this->height) * 2 );
+	}
+	
+	// Method to determine if the rectange 
+	// is also a square.
+	function isSquare() {	
+		if ($this->width == $this->height) {
+			return true; // Square
+		} else {
+			return false; // Not a square
+		}
+		
+	}
+
+} // End of Rectangle class.

week-15/simple-classes/pets1.php

+<?
+class Pet {
+
+    // Declare the attributes:
+    public $name;
+
+    // Constructor assigns the pet's name:
+    function __construct($pet_name) {
+        $this->name = $pet_name;
+    }
+    
+    // Pets can eat:
+    function eat() {
+        echo "<p>$this->name is eating.</p>";
+    }
+    
+    // Pets can sleep:
+    function sleep() {
+        echo "<p>$this->name is sleeping.</p>";
+    }
+
+} // End of Pet class.
+
+/* Cat class extends Pet.
+ * Cat has additional method: climb().
+ */
+class Cat extends Pet {
+    function climb() {
+        echo "<p>$this->name is climbing.</p>";
+    }
+} // End of Cat class.
+
+/* Dog class extends Pet.
+ * Dog has additional method: fetch().
+ */
+class Dog extends Pet {
+    function fetch() {
+        echo "<p>$this->name is fetching.</p>";
+    }
+} // End of Dog class.
+
+# ***** END OF CLASSES ***** #
+
+// Create a dog:
+$dog = new Dog('Rover');
+
+// Create a cat:
+$cat = new Cat('Whiskers');
+
+// Feed them:
+$dog->eat();
+$cat->eat();
+
+// Nap time:
+$dog->sleep();
+$cat->sleep();
+
+// Do animal-specific thing:
+$dog->fetch();
+$cat->climb();
+
+// Delete the objects:
+unset($dog, $cat);
+
+?>

week-15/simple-classes/pets2.php

+<?
+class Pet {
+    public $name;
+    function __construct($pet_name) {
+        $this->name = $pet_name;
+    }
+    function eat() {
+        echo "<p>$this->name is eating.</p>";
+    }
+    function sleep() {
+        echo "<p>$this->name is sleeping.</p>";
+    }
+
+    // Pets can play:
+    function play() {
+        echo "<p>$this->name is playing.</p>";
+    }
+
+} // End of Pet class.
+
+/* Cat class extends Pet.
+ * Cat overrides play().
+ */
+class Cat extends Pet {
+    function play() {
+        echo "<p>$this->name is climbing.</p>";
+    }
+} // End of Cat class.
+
+/* Dog class extends Pet.
+ * Dog overrides play().
+ */
+class Dog extends Pet {
+    function play() {
+        echo "<p>$this->name is fetching.</p>";
+    }
+} // End of Dog class.
+
+# ***** END OF CLASSES ***** #
+
+// Create a dog:
+$dog = new Dog('Rover');
+
+// Create a cat:
+$cat = new Cat('Whiskers');
+
+// Create an unknown type of pet:
+$pet = new Pet('Rob');
+
+// Feed them:
+$dog->eat();
+$cat->eat();
+$pet->eat();
+
+// Nap time:
+$dog->sleep();
+$cat->sleep();
+$pet->sleep();
+
+// Have them play:
+$dog->play();
+$cat->play();
+$pet->play();
+
+// Delete the objects:
+unset($dog, $cat, $pet);
+
+?>

week-15/simple-classes/pets3.php

+<!doctype html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+    <title>Pets</title>
+    <link rel="stylesheet" href="style.css">
+</head>
+<body>
+<?php # Script 5.5 - pets3.php
+//  This page defines and uses the Pet, Cat, and Dog classes. 
+
+# ***** CLASSES ***** #
+
+/* Class Pet.
+ *  The class contains one attribute: name.
+ *  The class contains four methods: 
+ *  - __construct()
+ *  - eat()
+ *  - sleep()
+ *  - play()
+ */
+class Pet {
+    public $name;
+    function __construct($pet_name) {
+        $this->name = $pet_name;
+        self::sleep();
+    }
+    function eat() {
+        echo "<p>$this->name is eating.</p>";
+    }
+    function sleep() {
+        echo "<p>$this->name is sleeping.</p>";
+    }
+    function play() {
+        echo "<p>$this->name is playing.</p>";
+    }
+} // End of Pet class.
+
+/* Cat class extends Pet.
+ * Cat overrides play().
+ */
+class Cat extends Pet {
+    function play() {
+    
+        // Call the Pet::play() method:
+        parent::play();
+    
+        echo "<p>$this->name is climbing.</p>";     
+    }
+} // End of Cat class.
+
+/* Dog class extends Pet.
+ * Dog overrides play().
+ */
+class Dog extends Pet {
+    function play() {
+    
+        // Call the Pet::play() method:
+        parent::play();
+    
+        echo "<p>$this->name is fetching.</p>";
+    }
+} // End of Dog class.
+
+# ***** END OF CLASSES ***** #
+
+// Create a dog:
+$dog = new Dog('Satchel');
+
+// Create a cat:
+$cat = new Cat('Bucky');
+
+// Create an unknown type of pet:
+$pet = new Pet('Rob');
+
+// Feed them:
+$dog->eat();
+$cat->eat();
+$pet->eat();
+
+// Nap time:
+$dog->sleep();
+$cat->sleep();
+$pet->sleep();
+
+// Have them play:
+$dog->play();
+$cat->play();
+$pet->play();
+
+// Delete the objects:
+unset($dog, $cat, $pet);
+
+?>
+</body>
+</html>
\ No newline at end of file

week-15/simple-classes/pets4.php

+<!doctype html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+    <title>Pets</title>
+    <link rel="stylesheet" href="style.css">
+</head>
+<body>
+<?php # Script 5.5 - pets3.php
+//  This page defines and uses the Pet, Cat, and Dog classes. 
+
+spl_autoload_register(function ($class_name) {
+	$class_name = strtolower($class_name);
+	include $class_name . '.class.php';
+});
+
+
+// Create a dog:
+$dog = new Dog('Satchel');
+
+// Create a cat:
+$cat = new Cat('Bucky');
+
+// Create an unknown type of pet:
+$pet = new Pet('Rob');
+
+// Feed them:
+$dog->eat();
+$cat->eat();
+$pet->eat();
+
+// Nap time:
+$dog->sleep();
+$cat->sleep();
+$pet->sleep();
+
+// Have them play:
+$dog->play();
+$cat->play();
+$pet->play();
+
+// Delete the objects:
+unset($dog, $cat, $pet);
+
+?>
+</body>
+</html>

week-15/simple-classes/rectangle1.php

+<?
+
+// Include the class definition:
+require('Rectangle1.php');
+
+// Define the necessary variables:
+$width = 42;
+$height = 7;
+
+// Print a little introduction:
+echo "<h2>With a width of $width and a height of $height...</h2>";
+    
+// Create a new object:
+$r = new Rectangle();
+
+// Assign the rectangle dimensions:
+$r->setSize($width, $height);
+
+// Print the area:
+echo '<p>The area of the rectangle is ' . $r->getArea() . '</p>';
+    
+// Print the perimeter:
+echo '<p>The perimeter of the rectangle is ' . $r->getPerimeter() . '</p>';
+
+// Is this a square?
+echo '<p>This rectangle is ';
+if ($r->isSquare()) {
+    echo 'also';
+} else {
+    echo 'not';
+}
+echo ' a square.</p>';
+
+// Delete the object:
+unset($r);
+
+?>

week-15/simple-classes/rectangle2.php

+<?
+
+// Include the class definition:
+require('Rectangle2.php');
+
+// Define the necessary variables:
+$width = 160;
+$height = 75;
+
+// Print a little introduction:
+echo "<h2>With a width of $width and a height of $height...</h2>";
+	
+// Create a new object:
+$r = new Rectangle($width, $height);
+
+// Print the area.
+echo '<p>The area of the rectangle is ' . $r->getArea() . '</p>';
+	
+// Print the perimeter.
+echo '<p>The perimeter of the rectangle is ' . $r->getPerimeter() . '</p>';
+
+// Is this a square?
+echo '<p>This rectangle is ';
+if ($r->isSquare()) {
+	echo 'also';
+} else {
+	echo 'not';
+}
+echo ' a square.</p>';
+
+// Delete the object:
+unset($r);
+
+?>
+