PHP 5.5.20 is available

http_throttle

(PECL pecl_http >= 0.10.0)

http_throttleHTTP throttling

Description

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.

Parameters

sec

seconds to sleep after each chunk sent

bytes

the chunk size in bytes

Examples

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(0.12000);
http_send_file('document.pdf');
?>

See Also

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User Contributed Notes 1 note

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dr dot sane at gmail dot com
3 years ago
Note that in the example when it says "Send file with approximately 20 kbyte/s." that is only an upper bound. The file could still be sent at a lesser speed (e.g. 10 kb/s) if the client, network, or server, cannot handle the amount.
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