print_r(3) [php man page]

PRINT_R(3)								 1								PRINT_R(3)

print_r - Prints human-readable information about a variable

SYNOPSIS

       mixed print_r (mixed  $expression, [bool  $return = false])

DESCRIPTION

       print_r(3) displays information about a variable in a way that's readable by humans.

       print_r(3),  var_dump(3) and var_export(3) will also show protected and private properties of objects with PHP 5. Static class members will
       not be shown.

PARAMETERS

	      o $expression
		- The expression to be printed.

	      o $return
		- If you would like to capture the output of print_r(3), use the $return parameter. When this parameter is set to TRUE, print_r(3)
		will return the information rather than print it.

RETURN VALUES

	If  given a string, integer or float, the value itself will be printed. If given an array, values will be presented in a format that shows
       keys and elements. Similar notation is used for objects.

	When the $return parameter is TRUE, this function will return a string. Otherwise, the return value is TRUE.

NOTES

       Note

	      When the $return parameter is used, this function uses internal output buffering so it cannot be used inside an ob_start(3) callback
	      function.

EXAMPLES

       Example #1

	      print_r(3) example

	      <pre>
	      <?php
	      $a = array ('a' => 'apple', 'b' => 'banana', 'c' => array ('x', 'y', 'z'));
	      print_r ($a);
	      ?>
	      </pre>

	      The above example will output:

	      <pre>
	      Array
	      (
		  [a] => apple
		  [b] => banana
		  [c] => Array
		      (
			  [0] => x
			  [1] => y
			  [2] => z
		      )
	      )
	      </pre>

       Example #2

	      $return parameter example

	      <?php
	      $b = array ('m' => 'monkey', 'foo' => 'bar', 'x' => array ('x', 'y', 'z'));
	      $results = print_r($b, true); // $results now contains output from print_r
	      ?>

SEE ALSO

       ob_start(3), var_dump(3), var_export(3).

PHP Documentation Group 														PRINT_R(3)

CLASS_IMPLEMENTS(3)							 1						       CLASS_IMPLEMENTS(3)

class_implements - Return the interfaces which are implemented by the given class or interface

SYNOPSIS

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

DESCRIPTION

	This function returns an array with the names of the interfaces that the given $class and its parents implement.

PARAMETERS

	      o $class
		- An object (class instance) or a string (class or interface 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_implements(3) example

	      <?php

	      interface foo { }
	      class bar implements foo {}

	      print_r(class_implements(new bar));

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

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

	      // use __autoload to load the 'not_loaded' class
	      print_r(class_implements('not_loaded', true));

	      ?>

	      The above example will output something similar to:

	      Array
	      (
		  [foo] => foo
	      )

	      Array
	      (
		  [interface_of_not_loaded] => interface_of_not_loaded
	      )

SEE ALSO

       class_parents(3), get_declared_interfaces(3).

PHP Documentation Group 												       CLASS_IMPLEMENTS(3)