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packmac2

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    Ch. 7 The Factory Pattern - Catchable Fatal Error

    in PHP Advanced and Object-Oriented Programming: Visual QuickPro Guide (3rd Edition)

    Posted

    I've been banging on the following error for awhile and I cannot tell what is wrong, please help:

     

    Catchable fatal error: Argument 2 passed to ShapeFactory::Create() must be an array, string given, called in /home/content/14/11625314/html/AdvPHPwOOP/factory.php on line 22 and defined in /home/content/14/11625314/html/AdvPHPwOOP/ShapeFactory.php on line 11

     

     

    I'm using PHP 5.3 thru goDaddy

     

    Here's the code:

     

    <!doctype html>

    <html lang="en">
    <head>
        <meta charset="utf-8">
        <title>Factory</title>
        <link rel="stylesheet" href="style.css">
    </head>
    <body>
    <?php # Script 7.4 - factory.php
    // This page uses the ShapeFactory class (Script 7.2).
     
    // Load the class definitions:
    require('ShapeFactory.php');
    require('Shape.php');
    require('Triangle.php');
    require('Rectangle.php');
     
    // Minimal validation:
    if (isset($_GET['shape'], $_GET['dimensions'])) {
        
        // Create the new object:
        $obj=ShapeFactory::Create($_GET['shape'],$_GET['dimensions']);
        
        // Print a little introduction:
        echo "<h2>Creating a {$_GET['shape']}...</h2>";
     
        // Print the area:
        echo '<p>The area is ' . $obj->getArea() . '</p>';
     
        // Print the perimeter:
        echo '<p>The perimeter is ' . $obj->getPerimeter() . '</p>';
        
    } else {
        echo '<p class="error">Please provide a shape type and size.</p>';
    }
     
    // Delete the object:
    unset($obj);
     
    ?>
    </body>
    </html>
     
     
    ****************
     
    <?php # Script 7.3 - ShapeFactory.php
    // This page defines a ShapeFactory class which uses the Factory pattern.
     
    /* The ShapeFactory class.
     * The class contains no attributes.
     * The class contains one method: Create().
     */
    abstract class ShapeFactory {
        
        // Static method that creates objects:
        static function Create($type, array $sizes) {
            
            // Determine the object type based upon the parameters received.
            switch ($type) {
                case 'rectangle':
                    return new Rectangle($sizes[0], $sizes[1]);
                    break;
                case 'triangle':
                    return new Triangle($sizes[0], $sizes[1], $sizes[2]);
                    break;
            } // End of switch.
             
        } // End of Create() method.
     
    } // End of ShapeFactory class.
     
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