<?php $filename = '1234_56_78 A_FAIRLY_SHORT_TITLE_D.pdf'; preg_match('~([^ _]+)[ _]([^ _]+)[ _]([^ _]+)[ _](.+)[ _](\S)~', pathinfo($filename, PATHINFO_FILENAME), $m); var_export([ 'project_no' => $m[1], 'series_no' => $m[2], 'sheet_no' => $m[3], 'title' => str_replace('_', ' ', $m[4]), 'revision' => $m[5], ]);
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