com_invoke(3) [php man page]

COM_INVOKE(3)								 1							     COM_INVOKE(3)

com_invoke - Calls a COM component's method [deprecated]

DESCRIPTION

       mixed com_invoke (resource  $com_object, string	$function_name, [mixed	$function_parameters])

       com_invoke(3) invokes the method named $function_name of the COM component referenced by $com_object. com_invoke(3) returns FALSE on error,
       returns the $function_name's return value on success. All the extra  parameters	$function_parameters  are  passed  to  the  method  $func-
       tion_name.

       Example #1

	      Don't use com_invoke(), use OO syntax instead

	      <?php
	      // do this
	      $val = $obj->method($one, $two);
	      // instead of this:
	      $val = com_invoke($obj, 'method', $one, $two);
	      ?>

       Note

	       This  function does not exist in PHP 5; instead, you should use the regular and more natural OO syntax to access properties or call
	      methods.

PHP Documentation Group 													     COM_INVOKE(3)

FUNCTION_EXISTS(3)							 1							FUNCTION_EXISTS(3)

function_exists - Return TRUEif the given function has been defined

SYNOPSIS

       bool function_exists (string  $function_name)

DESCRIPTION

	Checks the list of defined functions, both built-in (internal) and user-defined, for $function_name.

PARAMETERS

	      o $function_name
		- The function name, as a string.

RETURN VALUES

	Returns TRUE if $function_name exists and is a function, FALSE otherwise.

       Note

	       This function will return FALSE for constructs, such as include_once(3) and echo(3).

EXAMPLES

       Example #1

	      function_exists(3) example

	      <?php
	      if (function_exists('imap_open')) {
		  echo "IMAP functions are available.<br />
";
	      } else {
		  echo "IMAP functions are not available.<br />
";
	      }
	      ?>

NOTES

       Note

	       A  function  name may exist even if the function itself is unusable due to configuration or compiling options (with the image func-
	      tions being an example).

SEE ALSO

       method_exists(3), is_callable(3), get_defined_functions(3), class_exists(3), extension_loaded(3).

PHP Documentation Group 													FUNCTION_EXISTS(3)