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    <p>I actually serve my JS files from a PHP script. Not because of this issue but so I can control the expires header and caching. The general model is:</p> <ul> <li>The URL is something like /script/blah.1234567890.js;</li> <li>That URL is generated from the mtime of the blah.js file;</li> <li>That URL is sent to a js.php script via a rewrite rule in the .htaccess;</li> <li>The script checks the mtime passed in. If its newer than the mtime of the cached version it generates a new cached version from all my JS files (that are collated into a single file and then minified with JSMin);</li> <li>If the mtime is not newer than the script, the cached version is simply served;</li> <li>In all cases the content is set to expire a year from now.</li> </ul> <p>The timestamp in the URL allows for refreshing the script file.</p> <p>Now how does this relate to gzipping? Simple. At the top of my js.php script is:</p> <pre><code>ob_start("ob_gzhandler") </code></pre> <p>which turns on gzip compression if the client supports it (as well as using output buffering).</p> <p>It works really really.</p> <p>Try and limit yourself to exactly one JS and one CSS file. Combine them if necessary. I do the same trick with CSS files too (no minification of course).</p> <p>The advantage of this solution is it only relies on mod_rewrite being enabled. No other extension is necessary (ob_gzhandler is a standard part of PHP). Plus a script is necessary to combine the files (unless you do that as part of a build process but I find this a bit more tedious).</p>
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    1. POWhen I try to GZIP .js files using PHP I get some kind of php related error
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    1. COYeah, I also use the same kind of versioning system(almost) However I'm in doubt that adding ob_start("ob_gzhandler") on top of the .php (or.js file) will solve the issue, since php would still complain on the the same javascript line as stated in the question. I will try it though.
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