How to make PHP generate Chunked response

Question

I googled for this problem but there is no answer for it.

I want my PHP script to generate HTTP response in chunked( http://en.wikipedia.org/wiki/Chunked_transfer_en

Answer 1

Andriy F.'s solution worked for me. Here's a simplified version of his answer:

function dump_chunk($chunk)
{
    echo $chunk;
    flush();
    ob_flush();
}

header('Content-Type: text/html; charset=UTF-8');

flush();

for ($i = 0; $i < 3; $i++) {
    dump_chunk('Sending data chunk ' . ($i + 1) . ' of 1000 
');
    sleep(1);
}

Although I don't understand why the ob_flush() call is needed. If someone knows, please comment.