trait_exists(3) [php man page]

TRAIT_EXISTS(3) 							 1							   TRAIT_EXISTS(3)

trait_exists - Checks if the trait exists

SYNOPSIS

       bool trait_exists (string  $traitname, [bool  $autoload])

DESCRIPTION

PARAMETERS

	      o $traitname
		- Name of the trait to check

	      o $autoload
		- Whether to autoload if not already loaded.

RETURN VALUES

	Returns TRUE if trait exists, FALSE if not, NULL in case of an error.

PHP Documentation Group 													   TRAIT_EXISTS(3)

CLASS_PARENTS(3)							 1							  CLASS_PARENTS(3)

class_parents - Return the parent classes of the given class

SYNOPSIS

       array class_parents (mixed  $class, [bool  $autoload = true])

DESCRIPTION

	This function returns an array with the name of the parent classes of the given $class.

PARAMETERS

	      o $class
		- An object (class instance) or a string (class name).

	      o $autoload
		- Whether to allow this function to load the class automatically through the __autoload(3) magic method.

RETURN VALUES

	An array on success, or FALSE on error.

CHANGELOG

       +--------+---------------------------------------------------+
       |Version |						    |
       |	|						    |
       |	|		     Description		    |
       |	|						    |
       +--------+---------------------------------------------------+
       | 5.1.0	|						    |
       |	|						    |
       |	|  Added the option to pass the $class parameter as |
       |	| a string. Added the $autoload parameter.	    |
       |	|						    |
       +--------+---------------------------------------------------+
EXAMPLES

       Example #1

	      class_parents(3) example

	      <?php

	      class foo { }
	      class bar extends foo {}

	      print_r(class_parents(new bar));

	      // since PHP 5.1.0 you may also specify the parameter as a string
	      print_r(class_parents('bar'));

	      function __autoload($class_name) {
		 require_once $class_name . '.php';
	      }

	      // use __autoload to load the 'not_loaded' class
	      print_r(class_parents('not_loaded', true));
	      ?>

	      The above example will output something similar to:

	      Array
	      (
		  [foo] => foo
	      )

	      Array
	      (
		  [parent_of_not_loaded] => parent_of_not_loaded
	      )

SEE ALSO

       class_implements(3).

PHP Documentation Group 													  CLASS_PARENTS(3)