register_tick_function(3) [php man page]

REGISTER_TICK_FUNCTION(3)						 1						 REGISTER_TICK_FUNCTION(3)

register_tick_function - Register a function for execution on each tick

SYNOPSIS

       bool register_tick_function (callable  $function, [mixed  $arg], [mixed	$...])

DESCRIPTION

	Registers the given $function to be executed when a tick is called.

PARAMETERS

	      o $function
		- The function name as a string, or an array consisting of an object and a method.

	      o $arg
		-

	      o $...
		-

RETURN VALUES

	Returns TRUE on success or FALSE on failure.

EXAMPLES

       Example #1

	      register_tick_function(3) example

	      <?php
	      declare(ticks=1);

	      // using a function as the callback
	      register_tick_function('my_function', true);

	      // using an object->method
	      $object = new my_class();
	      register_tick_function(array(&$object, 'my_method'), true);
	      ?>

CHANGELOG

       +--------+---------------------------------------------------+
       |Version |						    |
       |	|						    |
       |	|		     Description		    |
       |	|						    |
       +--------+---------------------------------------------------+
       | 5.3.0	|						    |
       |	|						    |
       |	|  Ticks  are  now supported on threaded web server |
       |	| modules.					    |
       |	|						    |
       +--------+---------------------------------------------------+
NOTES

       Warning

	      register_tick_function(3) should not be used with threaded web server modules with PHP 5.2 or lower.

SEE ALSO

       declare, unregister_tick_function(3).

PHP Documentation Group 												 REGISTER_TICK_FUNCTION(3)

IS_CALLABLE(3)								 1							    IS_CALLABLE(3)

is_callable - Verify that the contents of a variable can be called as a function

SYNOPSIS

       bool is_callable (callable  $name, [bool  $syntax_only = false], [string  &$callable_name])

DESCRIPTION

	Verify	that  the  contents  of a variable can be called as a function. This can check that a simple variable contains the name of a valid
       function, or that an array contains a properly encoded object and function name.

PARAMETERS

	      o $name
		- The callback function to check

	      o $syntax_only
		- If set to TRUE the function only verifies that $name might be a function or method. It will only reject  simple  variables  that
		are  not  strings,  or an array that does not have a valid structure to be used as a callback. The valid ones are supposed to have
		only 2 entries, the first of which is an object or a string, and the second a string.

	      o $callable_name
		- Receives the "callable name". In the example below it is "someClass::someMethod". Note, however, that  despite  the  implication
		that someClass::SomeMethod() is a callable static method, this is not the case.

RETURN VALUES

	Returns TRUE if $name is callable, FALSE otherwise.

EXAMPLES

       Example #1

	      is_callable(3) example

	      <?php
	      //  How to check a variable to see if it can be called
	      //  as a function.

	      //
	      //  Simple variable containing a function
	      //

	      function someFunction()
	      {
	      }

	      $functionVariable = 'someFunction';

	      var_dump(is_callable($functionVariable, false, $callable_name));	// bool(true)

	      echo $callable_name, "
";  // someFunction

	      //
	      //  Array containing a method
	      //

	      class someClass {

		function someMethod()
		{
		}

	      }

	      $anObject = new someClass();

	      $methodVariable = array($anObject, 'someMethod');

	      var_dump(is_callable($methodVariable, true, $callable_name));  //  bool(true)

	      echo $callable_name, "
";  //  someClass::someMethod

	      ?>

SEE ALSO

       function_exists(3), method_exists(3).

PHP Documentation Group 													    IS_CALLABLE(3)