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    <p>If you're like me and may or may not be using php>=5.3.0 servers for whatever reason and want to use one set of code for all servers, and perhaps insist on involving the mime_content_type function somehow for servers that do not have Fileinfo, then you can use a half-arsed solution like mine, which is to make a replacement function which is that on php>=5.3.0 it uses Fileinfo, and on lower versions, if the filename ends in a specific string unique to something you want to override, it returns your hardcoded value, and calls mime_content_type() for all other types. However, of course this will NOT work if the file is of a type that mime_content_type() incorrectly detects and where the file name does not end in an extension, but that should be very rare.</p> <p>Such a solution might look something like this:</p> <pre><code>function _mime_content_type($filename) { //mime_content_type replacement that uses Fileinfo native to php&gt;=5.3.0 if( phpversion() &gt;= '5.3.0' ) { $result = new finfo(); if (is_resource($result) === true) { return $result-&gt;file($filename, FILEINFO_MIME_TYPE); } } else { if( substr( $filename, -5, 5 ) == '.docx' ) return 'application/vnd.openxmlformats-officedocument.wordprocessingml.document'; else if( substr( $filename, -5, 5 ) == '.xlsx' ) return 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'; else if( substr( $filename, -5, 5 ) == '.pptx' ) return 'application/vnd.openxmlformats-officedocument.spreadsheetml.presentation'; //amend this with manual overrides to your heart's desire return mime_content_type( $filename ); } } </code></pre> <p>and then you simply have to replace all your calls to mime_content_type with calls to _mime_content_type.</p>
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