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POCompressing content with PHP ob_start() vs Apache Deflate/Gzip?
 

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  1. POCompressing content with PHP ob_start() vs Apache Deflate/Gzip?
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    <p>Most sites want to compress their content to save on bandwidth. However, When it comes to apache servers running PHP there are two ways to do it - <a href="http://www.catswhocode.com/blog/3-ways-to-compress-css-files-using-php" rel="nofollow noreferrer">with PHP</a> or with apache. So which one is faster or easier on your server? </p> <p>For example, in PHP I run the following function at the start of my pages to enable it:</p> <pre><code>/** * Gzip compress page output * Original function came from wordpress.org */ function gzip_compression() { //If no encoding was given - then it must not be able to accept gzip pages if( empty($_SERVER['HTTP_ACCEPT_ENCODING']) ) { return false; } //If zlib is not ALREADY compressing the page - and ob_gzhandler is set if (( ini_get('zlib.output_compression') == 'On' OR ini_get('zlib.output_compression_level') &gt; 0 ) OR ini_get('output_handler') == 'ob_gzhandler' ) { return false; } //Else if zlib is loaded start the compression. if ( extension_loaded( 'zlib' ) AND (strpos($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip') !== FALSE) ) { ob_start('ob_gzhandler'); } } </code></pre> <p>The <a href="https://stackoverflow.com/questions/388595/why-use-deflate-instead-of-gzip-for-text-files-served-by-apache">other option</a> is to use Apache <a href="https://stackoverflow.com/questions/1574168/gzip-vs-deflate-zlib-revisited">deflate or gzip</a> (both which are <a href="https://stackoverflow.com/questions/883841/why-do-real-world-servers-prefer-gzip-over-deflate-encoding/1579506#1579506">very close</a>). To enable them you can add something like this to your .htaccess file.</p> <pre><code>AddOutputFilterByType DEFLATE text/html text/plain text/xml application/x-httpd-php </code></pre> <p>Since PHP is a scripting language (which must be loaded by PHP) I would assume that the apache method would be 1) more stable and 2) faster. But assumptions don't have much use in the real world. </p> <p>After all, you would assume that with the huge financial backing windows has... <em>uh</em>, we won't go there.</p>
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