PHP 使用pcntl和libevent實現Timer功能

//PHP 使用pcntl和libevent 實現Timer功能
<?php  

function newChild($func_name) {  
    echo "enter newChild\n";  
    $args = func_get_args();  
    unset($args[0]);  
    $pid =  pcntl_fork();  
    if ($pid == 0) {  
        function_exists($func_name) and exit(call_user_func_array($func_name, $args)) or exit(-1);  
    } else if($pid == -1) {  
        echo "Couldn't create child process";  
    } else {  
        return $pid;  
    }  
}  
function on_timer() {  
    echo "timer called\n";  
}  

   
/** 
 * @param $func string, function name 
 * @param $timeouts int, microtimes for time delay 
 */ 
function timer($func, $timeouts){  

   
    echo "enter timer\n";  
    $base = event_base_new();  
    $event = event_new();  

   
    event_set($event, 0, EV_TIMEOUT, $func);  
    event_base_set($event, $base);  
    event_add($event, $timeouts);  

   
    event_base_loop($base);  
}  

   
$pid = newChild("timer", "on_timer", 5000000);  

   
if ($pid > 0) {  
    echo "master process exit\n";  
}