在PHP的执行完成之前，HTTP进程不会继续

Question

我有一些php代码在后台执行另一个php文件，如下所示。问题是http进程在执行完成之前不会继续。如果有人能帮到我，我会非常感激。

//Process firstsearch/getInfo.php in the background
                            $file = "/home/cyber/public_html/firstsearch/getInfo.php";

                        //set Options array to be used for command execution
                        $options=array();
                        $option['sleep-after-destroy']=0;
                        $option['sleep-after-create']=0;
                        $option['age-max']=40;
                        $option['dir-run']=dirname(__FILE__);
                        $option['step-sleep']=1;
                        $option['workers-max']=(int)file_get_contents($file);
                        $option['destroy-forcefull']=1;
                        $workers=array();

                        //description pipe declaration
                        $desc = array(
                            0 => array('pipe', 'r'),
                            1 => array('pipe', 'w'),
                            2 => array('file', 'run_errors.txt', 'a')
                        );

                        //generate random number for file id
                        $i=rand();
                        //command to run the script
                        $runcommand='php '.$file.' '.$i.' '.$child_time_limit.' > '.$option["dir-run"].'/'.$i.'.normal.log';
                        //workers array of processes
                        $workers[$i]=array(
                                'desc' => array(
                                    0 => array("pipe", "r"),
                                    1 => array("pipe", "w"),
                                    2 => array("file", $i.'.error.log', "a")
                                    ),
                                'pipes'                 => null,
                                'link'                  => null,
                                'start-time'    => mktime()
                                );
                        //execution command
                        $workers[$i]['link']=proc_open(
                            $runcommand,
                            array(), //$workers[$i]['desc'],
                            $workers[$i]['pipes'],
                            $option['dir-run']
                            );
                        //halt for number of secs depending on the set option before proceeding to the next line of code
                        sleep($option['sleep-after-create']);
                        //get status of currently executed script
                        $proc_status=proc_get_status($workers[$i]['link']);
                        //get process id of the process
                        $pid=trim(exec('ps h -o pid  --ppid '.$proc_status['pid']));
                        //manually kill the process to avoid waiting for the execution to completed before the http process continues
                        exec('kill -s 9 '.$proc_status['pid']);
                        //close current process
                        proc_close($workers[$i]['link']);
                        //unregister workers array
                        unset($workers[$i]);
            //End of Process firstsearch/getInfo.php in the background