php基础,该怎么解决

<?php
ob_start();
include_once 'config.php';
include_once 'func.php';
ignore_user_abort(true);
$arr = '';
$max = 1024;
for($i =0;$i<$max;$i++){
    $arr .= $i;
}
echo $arr;
while(true){
    if(!connection_aborted()){
        echo ' ';
        ob_flush();
        flush();
        sleep(1);
    }else{
        include_once 'logout.php';
        exit();
    }
}
?>