PHP flush不起作用

Question

I'm trying to get PHP flush working for 2 hours, i can't make it work, in localhost it work, but when i drag it on server it stop working. The code is this:

<?php
  ob_implicit_flush(true);
  ob_end_flush();
  for ($i=0; $i<5; $i++) {
    echo $i.'<br>';
    sleep(1);
  }
?>

I tried a lot of other versions, but all the version i fond work only on localhost (as this), but not on my server, i read somewhere that it would be fixed changing some lines on the php.ini file, but i'm using an Aruba hosting windows domain, so i can't edit the php.ini, how can i do?

Update: I tried it on others two free hosting serice, and it work on them, it's just my main hosting services that do problem: what can it be?
Update: Since a lot of script i found use ini_set I tried to check values that they set, i don't know if they can be useful:
session.use_trans_sid 0 output_buffering 4096 zlib.output_compression Off

Answer 1

This works, but only in a default apache environment:

<?php
ini_set('output_buffering', 0);
ini_set('zlib.output_compression', 0);
if( !ob_get_level() ){ ob_start(); }
else { ob_end_clean(); ob_start(); }
for ($i = 0; $i < 10; $i++) {
  //For Nginx we have to reach minimum  buffer size, 
  //so if it is not enough increment output
  echo str_pad( $i . '<br>', 1024 + 10, ' ', STR_PAD_RIGHT ); 
  flush();
  ob_flush();
  sleep(1);
}

Nginx needs more configurations:

usually in /etc/nginx/nginx.conf

gzip off;
proxy_buffering off;
fastcgi_buffer_size 1k;       #set buffer to 1k
fastcgi_max_temp_file_size 0;
fastcgi_buffers 128 1k;       #set max buffer size to 1k + 128*1k