PHP - How Detect if Output Buffering is Turned On

问题

Is there a simple way to detect in PHP if output_buffering is ON in php.ini? I'd like to be able to display a message if it is not turned on.

Within my application I tried using an htaccess file to automatically turn it on but it seems it does not work in all server environments and in some cases it gives a nasty error.

Thank you very much!

回答1:

You can check any INI setting in PHP with the ini_get method. http://php.net/ini_get

ini_get('output_buffering');

Likewise, you can change most INI settings with ini_set:

ini_set('output_buffering', 'on');

回答2:

You can access the output_buffering value in the php.ini file by doing:

var_dump(ini_get('output_buffering'));

But I think what you are looking for is ob_get_level() (or ob_get_status()):

var_dump(ob_get_level());

Returns the level of nested output buffering handlers or zero if output buffering is not active.

回答3:

simple

check by

echo ini_get('output_buffering');

or run a file calling phpinfo(); function it will list all veriables containing values check the value for 'output_buffering ' in list.

回答4:

I think you can go

if(!ob_start())
{
}

来源：https://stackoverflow.com/questions/5608975/php-how-detect-if-output-buffering-is-turned-on