PHP Manual: HTTP throttling

void http_throttle ( float $sec [, int $bytes = 40960 ] )

Sets the throttle delay and send buffer size.

Note: This function should be used in conjunction with http_send_data, http_send_file and http_send_stream.

Note: Provides a basic throttling mechanism, which will yield the current process or thread until the entity has been completely sent.

Note:
This may not work as expected with the following SAPI(s): FastCGI.

Example #1 A http_throttle example

Send file with approximately 20 kbyte/s.


<?php
// ~ 20 kbyte/s
# http_throttle(1, 20000);
# http_throttle(0.5, 10000);
http_throttle(0.1, 2000);
http_send_file('document.pdf');
?>

http_throttle