无法关闭 FastCGI 输出缓冲

Question

This script outputs after 10 seconds instead of incrementally:

ob_start(); // Start output buffer (if not enabled in php.ini)
for ($i = 0; $i < 10; $i++) {
    echo $i, ' ';
    ob_flush();
    flush();
    sleep(1);
}

I have IIS and FastCGI installed. in PHP.ini, I have

zlib.output_compression = Off
output_buffering = off

In C:\\Windows\\System32\\inetsrv\\Config\\applicationHost.config I have

<add name="PHP_viaFastCGI" 
path="*.php" 
verb="*" 
modules="FastCgiModule" 
scriptProcessor="C:\php\php-cgi.exe" 
resourceType="Unspecified" 
ResponseBufferLimit = "0"/>

All have seemingly no effect.

I need to find the correct way to turn off output buffering in FastCGI

Thanks in advance

Answer 1

I had the same issue, also running FastCGI PHP, and got it fixed by putting the following line in my index file (from where all other files are included), before everything else:

while (@ob_end_flush());

I found this command in the PHP docummentation . .

Answer 2

Don't know about IIS, but in CentOS I had to add the following to /etc/httpd/conf.d/fcgid.conf:

OutputBufferSize 0

Found the answer here after searching for an hour: http://forum.odin.com/threads/mod_fcgid-php-flush-function.91876/

Answer 3

The solution is here: PHP flush - User Contributed Notes

For a Windows system using IIS, the responseBufferLimit takes precedence over PHP's output_buffering settings. So you must also set the responseBufferLimit to be something lower than its default value.

In short, for IIS7+, edit the %windir%\\System32\\inetsrv\\config\\applicationHost.config file and add responseBufferLimit="0" to the PHP_via_FastCGI handler.

So the entire line will look something like:

<add name="PHP_via_FastCGI" path="*.php" verb="*" modules="FastCgiModule" scriptProcessor="C:\\PHP\\php-cgi.exe" resourceType="Either" responseBufferLimit="0" />

After that, ob_flush() and flush() will start to work as expected.