class_alias(3) [php man page]

CLASS_ALIAS(3)								 1							    CLASS_ALIAS(3)

class_alias - Creates an alias for a class

SYNOPSIS

       bool class_alias TRUE (string  $original, string  $alias, [bool	$autoload])

DESCRIPTION

	Creates an alias named $alias based on the user defined class $original. The aliased class is exactly the same as the original class.

PARAMETERS

	      o $original
		- The original class.

	      o $alias
		- The alias name for the class.

	      o $autoload
		- Whether to autoload if the original class is not found.

RETURN VALUES

	Returns TRUE on success or FALSE on failure.

EXAMPLES

       Example #1

	      class_alias(3) example

	      <?php

	      class foo { }

	      class_alias('foo', 'bar');

	      $a = new foo;
	      $b = new bar;

	      // the objects are the same
	      var_dump($a == $b, $a === $b);
	      var_dump($a instanceof $b);

	      // the classes are the same
	      var_dump($a instanceof foo);
	      var_dump($a instanceof bar);

	      var_dump($b instanceof foo);
	      var_dump($b instanceof bar);

	      ?>

	      The above example will output:

	      bool(true)
	      bool(false)
	      bool(true)
	      bool(true)
	      bool(true)
	      bool(true)
	      bool(true)

SEE ALSO

       get_parent_class(3), is_subclass_of(3).

PHP Documentation Group 													    CLASS_ALIAS(3)

PROPERTY_EXISTS(3)							 1							PROPERTY_EXISTS(3)

property_exists - Checks if the object or class has a property

SYNOPSIS

       bool property_exists (mixed  $class, string  $property)

DESCRIPTION

	This function checks if the given $property exists in the specified class.

       Note

	       As opposed with isset(3), property_exists(3) returns TRUE even if the property has the value NULL.

PARAMETERS

	      o $class
		- The class name or an object of the class to test for

	      o $property
		- The name of the property

RETURN VALUES

	Returns TRUE if the property exists, FALSE if it doesn't exist or NULL in case of an error.

NOTES

       Note

	      Using this function will use any registered autoloaders if the class is not already known.

       Note

	       The property_exists(3) function cannot detect properties that are magically accessible using the __get magic method.

CHANGELOG

       +--------+---------------------------------------------------+
       |Version |						    |
       |	|						    |
       |	|		     Description		    |
       |	|						    |
       +--------+---------------------------------------------------+
       | 5.3.0	|						    |
       |	|						    |
       |	|  This function checks the existence of a property |
       |	| independent of accessibility. 		    |
       |	|						    |
       +--------+---------------------------------------------------+
EXAMPLES

       Example #1

	      A property_exists(3) example

	      <?php

	      class myClass {
		  public $mine;
		  private $xpto;
		  static protected $test;

		  static function test() {
		      var_dump(property_exists('myClass', 'xpto')); //true
		  }
	      }

	      var_dump(property_exists('myClass', 'mine'));   //true
	      var_dump(property_exists(new myClass, 'mine')); //true
	      var_dump(property_exists('myClass', 'xpto'));   //true, as of PHP 5.3.0
	      var_dump(property_exists('myClass', 'bar'));    //false
	      var_dump(property_exists('myClass', 'test'));   //true, as of PHP 5.3.0
	      myClass::test();

	      ?>

SEE ALSO

       method_exists(3).

PHP Documentation Group 													PROPERTY_EXISTS(3)