PHP output buffering on XAMPP

Question

It seems that despite everything i've done trying to get it to work, It just doesnt work.

Here's what all I did :

output_buffering = 4096
zlib.output_compression = Off
Tried using ob_implicit_flush();
Tried using ob_flush();
Reduced the buffer size in the ini setting output_buffering to 1

Following is the code that i'm trying to get to work (basically output a line every 1 second) but i'm getting the entire output after 15 seconds.

With ob_implicit_flush() :

<?php
ob_implicit_flush();

for($i=0;$i<=15;$i++)
{
    print($i."<BR />");
    sleep(1);
}

with using ob_start() and ob_flush() methods :

<?php
ob_start();
for($i=0;$i<=15;$i++)
{
    print($i."<BR />");
    ob_flush();
}

Is there any other PHP setting that I am missing ? Please help.

EDIT : Using the example by the OP in this SO question, it works : PHP buffer why \r\n

I see that I had to do a str_repeat() to generate a string to overflow the buffer. Why is nothing of this mentioned in the php manual ? Is this really the procedure ?

This code looks incomplete. I cannot see the calls to the ob_* set of functions in the context of the samples. — Treffynnon

Treffynnon Treffynnon · Accepted Answer · 2012-03-01T22:04:44

PHP returns one response to a request. If you have sleep() calls in that code then the whole response will wait for those calls. PHP doesn't pass a response back to the browser in chunks even if you put a one second sleep in between prints.

If you are using PHP as an interactive console then this could should work and behave as you are anticipating.

PHP output buffering on XAMPP

2 Answers