php ticks 调试应用

declare(ticks=1);
register_tick_function('do_profile');
register_shutdown_function('show_profile');
 
$profile = array();
$last_time = microtime(true);
 
a();
 
function do_profile() {
    global $profile, $last_time;
    $bt = debug_backtrace();
    if (count($bt) <= 1) {
        return ;
    }
    $frame = $bt[1];
    unset($bt);
    $function = $frame['function'];
    if (!isset($profile[$function])) {
        $profile[$function] = array(
            'time'  => 0,
            'calls' => 0
        );
    }
    $profile[$function]['calls']++;
    $profile[$function]['time'] += (microtime(true) - $last_time);
    $last_time = microtime(true);
}
 
function show_profile() {
    global $profile;
    print_r($profile);
}
 
function a() {
    usleep(50 * 1000);
    b();
}
 
function b() {
    usleep(500 * 1000);
    c();
}
 
function c() {
    usleep(5000 * 1000);
}



输出:
Array
(
    [a] => Array
        (
            [time] => 0.0511748790741
            [calls] => 2
        )
 
    [b] => Array
        (
            [time] => 0.500598907471
            [calls] => 2
        )
 
    [c] => Array
        (
            [time] => 5.00052690506
            [calls] => 1
        )
 
)
 