<?php
class MyClass
{
    // Class properties and methods go here
}
?>

$obj = new MyClass;

var_dump($obj);

<?php
 
class MyClass
{
	// Class properties and methods go here
}
 
$obj = new MyClass;
 
var_dump($obj);
 
?>

object(MyClass)#1 (0) { }

<?php
 
class MyClass
{
    public $prop1 = "I'm a class property!";
}
 
$obj = new MyClass;
 
var_dump($obj);
 
?>

echo $obj->prop1;

<?php
 
class MyClass
{
    public $prop1 = "I'm a class property!";
}
 
$obj = new MyClass;
 
echo $obj->prop1; // Output the property
 
?>

I'm a class property!

<?php
 
class MyClass
{
    public $prop1 = "I'm a class property!";
 
    public function setProperty($newval)
    {
        $this->prop1 = $newval;
    }
 
    public function getProperty()
    {
        return $this->prop1 . "<br />";
    }
}
 
$obj = new MyClass;
 
echo $obj->prop1;
 
?>

<?php
 
class MyClass
{
    public $prop1 = "I'm a class property!";
 
    public function setProperty($newval)
    {
        $this->prop1 = $newval;
    }
 
    public function getProperty()
    {
        return $this->prop1 . "<br />";
    }
}
 
$obj = new MyClass;
 
echo $obj->getProperty(); // Get the property value
 
$obj->setProperty("I'm a new property value!"); // Set a new one
 
echo $obj->getProperty(); // Read it out again to show the change
 
?>

I'm a class property!
I'm a new property value!

<?php
 
class MyClass
{
    public $prop1 = "I'm a class property!";
 
    public function setProperty($newval)
    {
        $this->prop1 = $newval;
    }
 
    public function getProperty()
    {
        return $this->prop1 . "<br />";
    }
}
 
// Create two objects
$obj = new MyClass;
$obj2 = new MyClass;
 
// Get the value of $prop1 from both objects
echo $obj->getProperty();
echo $obj2->getProperty();
 
// Set new values for both objects
$obj->setProperty("I'm a new property value!");
$obj2->setProperty("I belong to the second instance!");
 
// Output both objects' $prop1 value
echo $obj->getProperty();
echo $obj2->getProperty();
 
?>

I'm a class property!
I'm a class property!
I'm a new property value!
I belong to the second instance!

<?php
 
class MyClass
{
    public $prop1 = "I'm a class property!";
 
    public function __construct()
    {
        echo 'The class "', __CLASS__, '" was initiated!<br />';
    }
 
    public function setProperty($newval)
    {
        $this->prop1 = $newval;
    }
 
    public function getProperty()
    {
        return $this->prop1 . "<br />";
    }
}
 
// Create a new object
$obj = new MyClass;
 
// Get the value of $prop1
echo $obj->getProperty();
 
// Output a message at the end of the file
echo "End of file.<br />";
 
?>

The class "MyClass" was initiated!
I'm a class property!
End of file.

<?php
 
class MyClass
{
    public $prop1 = "I'm a class property!";
 
    public function __construct()
    {
        echo 'The class "', __CLASS__, '" was initiated!<br />';
    }
 
    public function __destruct()
    {
        echo 'The class "', __CLASS__, '" was destroyed.<br />';
    }
 
    public function setProperty($newval)
    {
        $this->prop1 = $newval;
    }
 
    public function getProperty()
    {
        return $this->prop1 . "<br />";
    }
}
 
// Create a new object
$obj = new MyClass;
 
// Get the value of $prop1
echo $obj->getProperty();
 
// Output a message at the end of the file
echo "End of file.<br />";
 
?>

The class "MyClass" was initiated!
I'm a class property!
End of file.
The class "MyClass" was destroyed.

<?php
 
class MyClass
{
    public $prop1 = "I'm a class property!";
 
    public function __construct()
    {
        echo 'The class "', __CLASS__, '" was initiated!<br />';
    }
 
    public function __destruct()
    {
        echo 'The class "', __CLASS__, '" was destroyed.<br />';
    }
 
    public function setProperty($newval)
    {
        $this->prop1 = $newval;
    }
 
    public function getProperty()
    {
        return $this->prop1 . "<br />";
    }
}
 
// Create a new object
$obj = new MyClass;
 
// Get the value of $prop1
echo $obj->getProperty();
 
// Destroy the object
unset($obj);
 
// Output a message at the end of the file
echo "End of file.<br />";
 
?>

The class "MyClass" was initiated!
I'm a class property!
The class "MyClass" was destroyed.
End of file.

<?php
 
class MyClass
{
    public $prop1 = "I'm a class property!";
 
    public function __construct()
    {
        echo 'The class "', __CLASS__, '" was initiated!<br />';
    }
 
    public function __destruct()
    {
        echo 'The class "', __CLASS__, '" was destroyed.<br />';
    }
 
    public function setProperty($newval)
    {
        $this->prop1 = $newval;
    }
 
    public function getProperty()
    {
        return $this->prop1 . "<br />";
    }
}
 
// Create a new object
$obj = new MyClass;
 
// Output the object as a string
echo $obj;
 
// Destroy the object
unset($obj);
 
// Output a message at the end of the file
echo "End of file.<br />";
 
?>

The class "MyClass" was initiated!
 
 
Catchable fatal error: Object of class MyClass could not be converted to string in  
/Applications/XAMPP/xamppfiles/htdocs/testing/test.php on line 40

<?php
 
class MyClass
{
    public $prop1 = "I'm a class property!";
 
    public function __construct()
    {
        echo 'The class "', __CLASS__, '" was initiated!<br />';
    }
 
    public function __destruct()
    {
        echo 'The class "', __CLASS__, '" was destroyed.<br />';
    }
 
    public function __toString()
    {
        echo "Using the toString method: ";
        return $this->getProperty();
    }
 
    public function setProperty($newval)
    {
        $this->prop1 = $newval;
    }
 
    public function getProperty()
    {
        return $this->prop1 . "<br />";
    }
}
 
// Create a new object
$obj = new MyClass;
 
// Output the object as a string
echo $obj;
 
// Destroy the object
unset($obj);
 
// Output a message at the end of the file
echo "End of file.<br />";
 
?>

The class "MyClass" was initiated!
Using the toString method: I'm a class property!
The class "MyClass" was destroyed.
End of file.

<?php
 
class MyClass
{
    public $prop1 = "I'm a class property!";
 
    public function __construct()
    {
        echo 'The class "', __CLASS__, '" was initiated!<br />';
    }
 
    public function __destruct()
    {
        echo 'The class "', __CLASS__, '" was destroyed.<br />';
    }
 
    public function __toString()
    {
        echo "Using the toString method: ";
        return $this->getProperty();
    }
 
    public function setProperty($newval)
    {
        $this->prop1 = $newval;
    }
 
    public function getProperty()
    {
        return $this->prop1 . "<br />";
    }
}
 
class MyOtherClass extends MyClass
{
    public function newMethod()
    {
        echo "From a new method in " . __CLASS__ . ".<br />";
    }
}
 
// Create a new object
$newobj = new MyOtherClass;
 
// Output the object as a string
echo $newobj->newMethod();
 
// Use a method from the parent class
echo $newobj->getProperty();
 
?>

The class "MyClass" was initiated!
From a new method in MyOtherClass.
I'm a class property!
The class "MyClass" was destroyed.

<?php
 
class MyClass
{
    public $prop1 = "I'm a class property!";
 
    public function __construct()
    {
        echo 'The class "', __CLASS__, '" was initiated!<br />';
    }
 
    public function __destruct()
    {
        echo 'The class "', __CLASS__, '" was destroyed.<br />';
    }
 
    public function __toString()
    {
        echo "Using the toString method: ";
        return $this->getProperty();
    }
 
    public function setProperty($newval)
    {
        $this->prop1 = $newval;
    }
 
    public function getProperty()
    {
        return $this->prop1 . "<br />";
    }
}
 
class MyOtherClass extends MyClass
{
    public function __construct()
    {
        echo "A new constructor in " . __CLASS__ . ".<br />";
    }
 
    public function newMethod()
    {
        echo "From a new method in " . __CLASS__ . ".<br />";
    }
}
 
// Create a new object
$newobj = new MyOtherClass;
 
// Output the object as a string
echo $newobj->newMethod();
 
// Use a method from the parent class
echo $newobj->getProperty();
 
?>

A new constructor in MyOtherClass.
From a new method in MyOtherClass.
I'm a class property!
The class "MyClass" was destroyed.

<?php
 
class MyClass
{
    public $prop1 = "I'm a class property!";
 
    public function __construct()
    {
        echo 'The class "', __CLASS__, '" was initiated!<br />';
    }
 
    public function __destruct()
    {
        echo 'The class "', __CLASS__, '" was destroyed.<br />';
    }
 
    public function __toString()
    {
        echo "Using the toString method: ";
        return $this->getProperty();
    }
 
    public function setProperty($newval)
    {
        $this->prop1 = $newval;
    }
 
    public function getProperty()
    {
        return $this->prop1 . "<br />";
    }
}
 
class MyOtherClass extends MyClass
{
    public function __construct()
    {
        parent::__construct(); // Call the parent class's constructor
        echo "A new constructor in " . __CLASS__ . ".<br />";
    }
 
    public function newMethod()
    {
        echo "From a new method in " . __CLASS__ . ".<br />";
    }
}
 
// Create a new object
$newobj = new MyOtherClass;
 
// Output the object as a string
echo $newobj->newMethod();
 
// Use a method from the parent class
echo $newobj->getProperty();
 
?>

The class "MyClass" was initiated!
A new constructor in MyOtherClass.
From a new method in MyOtherClass.
I'm a class property!
The class "MyClass" was destroyed.

<?php
 
class MyClass
{
    public $prop1 = "I'm a class property!";
 
    public function __construct()
    {
        echo 'The class "', __CLASS__, '" was initiated!<br />';
    }
 
    public function __destruct()
    {
        echo 'The class "', __CLASS__, '" was destroyed.<br />';
    }
 
    public function __toString()
    {
        echo "Using the toString method: ";
        return $this->getProperty();
    }
 
    public function setProperty($newval)
    {
        $this->prop1 = $newval;
    }
 
    protected function getProperty()
    {
        return $this->prop1 . "<br />";
    }
}
 
class MyOtherClass extends MyClass
{
    public function __construct()
    {
        parent::__construct();
		echo "A new constructor in " . __CLASS__ . ".<br />";
    }
 
    public function newMethod()
    {
        echo "From a new method in " . __CLASS__ . ".<br />";
    }
}
 
// Create a new object
$newobj = new MyOtherClass;
 
// Attempt to call a protected method
echo $newobj->getProperty();
 
?>

The class "MyClass" was initiated!
A new constructor in MyOtherClass.
 
Fatal error: Call to protected method MyClass::getProperty() from context '' in  
/Applications/XAMPP/xamppfiles/htdocs/testing/test.php on line 55

<?php
 
class MyClass
{
    public $prop1 = "I'm a class property!";
 
    public function __construct()
    {
        echo 'The class "', __CLASS__, '" was initiated!<br />';
    }
 
    public function __destruct()
    {
        echo 'The class "', __CLASS__, '" was destroyed.<br />';
    }
 
    public function __toString()
    {
        echo "Using the toString method: ";
        return $this->getProperty();
    }
 
    public function setProperty($newval)
    {
        $this->prop1 = $newval;
    }
 
    protected function getProperty()
    {
        return $this->prop1 . "<br />";
    }
}
 
class MyOtherClass extends MyClass
{
    public function __construct()
    {
        parent::__construct();
		echo "A new constructor in " . __CLASS__ . ".<br />";
    }
 
    public function newMethod()
    {
        echo "From a new method in " . __CLASS__ . ".<br />";
    }
 
    public function callProtected()
    {
        return $this->getProperty();
    }
}
 
// Create a new object
$newobj = new MyOtherClass;
 
// Call the protected method from within a public method
echo $newobj->callProtected();
 
?>

The class "MyClass" was initiated!
A new constructor in MyOtherClass.
I'm a class property!
The class "MyClass" was destroyed.

<?php
 
class MyClass
{
    public $prop1 = "I'm a class property!";
 
    public function __construct()
    {
        echo 'The class "', __CLASS__, '" was initiated!<br />';
    }
 
    public function __destruct()
    {
        echo 'The class "', __CLASS__, '" was destroyed.<br />';
    }
 
    public function __toString()
    {
        echo "Using the toString method: ";
        return $this->getProperty();
    }
 
    public function setProperty($newval)
    {
        $this->prop1 = $newval;
    }
 
    private function getProperty()
    {
        return $this->prop1 . "<br />";
    }
}
 
class MyOtherClass extends MyClass
{
    public function __construct()
    {
        parent::__construct();
        echo "A new constructor in " . __CLASS__ . ".<br />";
    }
 
    public function newMethod()
    {
        echo "From a new method in " . __CLASS__ . ".<br />";
    }
 
    public function callProtected()
    {
        return $this->getProperty();
    }
}
 
// Create a new object
$newobj = new MyOtherClass;
 
// Use a method from the parent class
echo $newobj->callProtected();
 
?>

The class "MyClass" was initiated!
A new constructor in MyOtherClass.
 
Fatal error: Call to private method MyClass::getProperty() from context 'MyOtherClass' in  
/Applications/XAMPP/xamppfiles/htdocs/testing/test.php on line 49

<?php
 
class MyClass
{
    public $prop1 = "I'm a class property!";
 
    public static $count = 0;
 
    public function __construct()
    {
        echo 'The class "', __CLASS__, '" was initiated!<br />';
    }
 
    public function __destruct()
    {
        echo 'The class "', __CLASS__, '" was destroyed.<br />';
    }
 
    public function __toString()
    {
        echo "Using the toString method: ";
        return $this->getProperty();
    }
 
    public function setProperty($newval)
    {
        $this->prop1 = $newval;
    }
 
    private function getProperty()
    {
        return $this->prop1 . "<br />";
    }
 
    public static function plusOne()
    {
        return "The count is " . ++self::$count . ".<br />";
    }
}
 
class MyOtherClass extends MyClass
{
    public function __construct()
    {
        parent::__construct();
        echo "A new constructor in " . __CLASS__ . ".<br />";
    }
 
    public function newMethod()
    {
        echo "From a new method in " . __CLASS__ . ".<br />";
    }
 
    public function callProtected()
    {
        return $this->getProperty();
    }
}
 
do
{
    // Call plusOne without instantiating MyClass
    echo MyClass::plusOne();
} while ( MyClass::$count < 10 );
 
?>

The count is 1.
The count is 2.
The count is 3.
The count is 4.
The count is 5.
The count is 6.
The count is 7.
The count is 8.
The count is 9.
The count is 10.

/**
 * This is a very basic DocBlock
 */

<?php
 
/**
 * A simple class
 *
 * This is the long description for this class,
 * which can span as many lines as needed. It is
 * not required, whereas the short description is
 * necessary.
 *
 * It can also span multiple paragraphs if the
 * description merits that much verbiage.
 *
 * @author Jason Lengstorf <jason.lengstorf@ennuidesign.com>
 * @copyright 2010 Ennui Design
 * @license http://www.php.net/license/3_01.txt PHP License 3.01
 */
class SimpleClass
{
    /**
     * A public variable
     *
     * @var string stores data for the class
     */
    public $foo;
 
    /**
     * Sets $foo to a new value upon class instantiation
     *
     * @param string $val a value required for the class
     * @return void
     */
    public function __construct($val)
    {
        $this->foo = $val;
    }
 
    /**
     * Multiplies two integers
     *
     * Accepts a pair of integers and returns the
     * product of the two.
     *
     * @param int $bat a number to be multiplied
     * @param int $baz a number to be multiplied
     * @return int the product of the two parameters
     */
    public function bar($bat, $baz)
    {
        return $bat * $baz;
    }
}
 
?>

<?php
 
function changeJob($person, $newjob)
{
    $person['job'] = $newjob; // Change the person's job
    return $person;
}
 
function happyBirthday($person)
{
    ++$person['age']; // Add 1 to the person's age
    return $person;
}
 
$person1 = array(
    'name' => 'Tom',
    'job' => 'Button-Pusher',
    'age' => 34
);
 
$person2 = array(
    'name' => 'John',
    'job' => 'Lever-Puller',
    'age' => 41
);
 
// Output the starting values for the people
echo "<pre>Person 1: ", print_r($person1, TRUE), "<\/pre>";
echo "<pre>Person 2: ", print_r($person2, TRUE), "<\/pre>";
 
// Tom got a promotion and had a birthday
$person1 = changeJob($person1, 'Box-Mover');
$person1 = happyBirthday($person1);
 
// John just had a birthday
$person2 = happyBirthday($person2);
 
// Output the new values for the people
echo "<pre>Person 1: ", print_r($person1, TRUE), "<\/pre>";
echo "<pre>Person 2: ", print_r($person2, TRUE), "<\/pre>";
 
?>

Person 1: Array   
(   
    [name] => Tom   
    [job] => Button-Pusher   
    [age] => 34   
)   
Person 2: Array   
(   
    [name] => John   
    [job] => Lever-Puller   
    [age] => 41   
)   
Person 1: Array   
(   
    [name] => Tom   
    [job] => Box-Mover   
    [age] => 35   
)   
Person 2: Array   
(   
    [name] => John   
    [job] => Lever-Puller   
    [age] => 42   
)

<?php
 
class Person
{
    private $_name;
    private $_job;
    private $_age;
 
    public function __construct($name, $job, $age)
    {
        $this->_name = $name;
        $this->_job = $job;
        $this->_age = $age;
    }
 
    public function changeJob($newjob)
    {
        $this->_job = $newjob;
    }
 
    public function happyBirthday()
    {
        ++$this->_age;
    }
}
 
// Create two new people
$person1 = new Person("Tom", "Button-Pusher", 34);
$person2 = new Person("John", "Lever Puller", 41);
 
// Output their starting point
echo "<pre>Person 1: ", print_r($person1, TRUE), "<\/pre>";
echo "<pre>Person 2: ", print_r($person2, TRUE), "<\/pre>";
 
// Give Tom a promotion and a birthday
$person1->changeJob("Box-Mover");
$person1->happyBirthday();
 
// John just gets a year older
$person2->happyBirthday();
 
// Output the ending values
echo "<pre>Person 1: ", print_r($person1, TRUE), "<\/pre>";
echo "<pre>Person 2: ", print_r($person2, TRUE), "<\/pre>";
 
?>

Person 1: Person Object
(
    [_name:private] => Tom
    [_job:private] => Button-Pusher
    [_age:private] => 34
)
 
Person 2: Person Object
(
    [_name:private] => John
    [_job:private] => Lever Puller
    [_age:private] => 41
)
 
Person 1: Person Object
(
    [_name:private] => Tom
    [_job:private] => Box-Mover
    [_age:private] => 35
)
 
Person 2: Person Object
(
    [_name:private] => John
    [_job:private] => Lever Puller
    [_age:private] => 42
)

<?php
    function __autoload($class_name)
    {
        include_once 'inc/class.' . $class_name . '.inc.php';
    }
?>