ob_start（）; 在PHP？

Question

When using on_start() does it make any difference to do,

// ENABLE GZIP COMPRESSION
ob_start();
ob_start('ob_gzhandler');

Or is this exactly the same,

// ENABLE GZIP COMPRESSION
ob_start('ob_gzhandler');

I ask as with the first example my website seems to speed up a bit.

Thanks

Answer 1

You should do either:

ob_start();

or:

ob_start('ob_gzhandler');

But not both. You can check $_SERVER['HTTP_ACCEPT_ENCODING'] to see if the user agent accepts gzip encodings:

if(strpos($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip') !== false)
   ob_start('ob_gzhandler');
else
    ob_start();