Is using output buffering considered a bad practice?

Are ob_start / ob_get_clean() considered bad practice by php programmers in general?

Are there any disadvantages of output buffering?

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It's actually a good practice. Speed up data transfer

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Output buffering in some circumstances is almost mandatory. With PHP as soon as you output something back to the user, headers are sent. Therefore if you get partway through processing a page and something happens that requires a header being sent you cant unless buffering is turned on. Otherwise you get the dreaded "Cannot modify header information – headers already sent".

Some will tell you you shouldn't code that way. humbug I say!

With buffers turned on your code can be more flexible.

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output buffering is NOT a bad practice. For example it can speed up the loading of your website by using GZIP compression(although if possible it is better to do this inside .htaccess).

<?php 
    if (substr_count($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip')) 
        ob_start("ob_gzhandler"); 
    else 
        ob_start(); 
?>

Disadvantages: I don't know. Good question.

PS: also I found this topic about output buffering.

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