/**
* 得到當前時間
*/
function getMicrotime() {

list ($usec, $sec) = explode(" ", microtime());
return ((float) $usec + (float) $sec);
}

<?php
// This file is abc.php

include 'test1.php';
include_once 'test2.php';
require 'test3.php';
require_once 'test4.php';

$included_files = get_included_files();

foreach ($included_files as $filename) {
echo "$filenamen";
}
?>

<?php
function myrow($id, $data)
{
return "<tr><th>$id</th><td>$data</td></tr>n";
}
$arr = get_defined_functions();
print_r($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
)
)