Online PHP editor | output for ju21a

<?php // Start sample $raw_str = 'šđčćž ŠĐČĆŽ - x'; $fallback_str = 'generated__' . date('Y-m-d_H-m_A'); $bad_extension = '....t&+++a()r.gz[]'; echo str_file($raw_str, '_', $bad_extension, $fallback_str); // End sample // Returns filesystem-safe string after cleaning, filtering, and trimming input function str_file_filter( $str, $sep = '_', $strict = false, $trim = 248) { $str = strip_tags(htmlspecialchars_decode(strtolower($str))); // lowercase -> decode -> strip tags $str = str_replace("%20", ' ', $str); // convert rogue %20 into spaces $str = preg_replace("/%[a-z0-9]{1,2}/i", '', $str); // remove hexy things $str = str_replace(" ", ' ', $str); // convert all nbsp into space $str = preg_replace("/&#?[a-z0-9]{2,8};/i", '', $str); // remove the other non-tag things $str = preg_replace("/\s+/", $sep, $str); // filter multiple spaces $str = preg_replace("/\.+/", '.', $str); // filter multiple periods $str = preg_replace("/^\.+/", '', $str); // trim leading period if ($strict) { $str = preg_replace("/([^\w\d\\" . $sep . ".])/", '', $str); // only allow words and digits } else { $str = preg_replace("/([^\w\d\\" . $sep . "\[\].])/", '', $str); // allow words, digits, [], and () } $str = preg_replace("/\\" . $sep . "+/", $sep, $str); // filter multiple separators $str = substr($str, 0, $trim); // trim filename to desired length, note 255 char limit on windows return $str; } // Returns full file name including fallback and extension function str_file( $str, $sep = '_', $ext = '', $default = '', $trim = 248) { // Run $str and/or $ext through filters to clean up strings $str = str_file_filter($str, $sep); $ext = '.' . str_file_filter($ext, '', true); // Default file name in case all chars are trimmed from $str, then ensure there is an id at tail if (empty($str) && empty($default)) { $str = 'no_name__' . date('Y-m-d_H-m_A') . '__' . uniqid(); } elseif (empty($str)) { $str = $default; } // Return completed string if (!empty($ext)) { return $str . $ext; } else { return $str; } }