(PHP 4 >= 4.0.4, PHP 5)
get_defined_functions — Returns an array of all defined functions
Gets an array of all defined functions.
Returns an multidimensional array containing a list of all defined functions, both built-in (internal) and user-defined. The internal functions will be accessible via $arr["internal"], and the user defined ones using $arr["user"] (see example below).
Example #1 get_defined_functions() example 以上例程的输出类似于：
<?php
function myrow($id, $data)
{
return "<tr><th>$id</th><td>$data</td></tr>
";
}
$arr = get_defined_functions();
print_r($arr);
?>
Array
(
[internal] => Array
(
[0] => zend_version
[1] => func_num_args
[2] => func_get_arg
[3] => func_get_args
[4] => strlen
[5] => strcmp
[6] => strncmp
...
[750] => bcscale
[751] => bccomp
)
[user] => Array
(
[0] => myrow
)
)