note 72052 added to ref.filesystem

Here's a function that checks if a string filename, absolute or relative, is valid or not. <?php function validFilename($file) { if( checkCurrentOS( 'Win' )) { // if has invalid filename, return false if ( preg_match( '/PRN|CON|AUX|CLOCK\$|NUL|COM\d|LPT\d/i', $file)) { return false; } $parts = explode( "\\", $file); // if a drive letter, approve (don't check it later) if (preg_match( '/[A-Za-z]:/', $parts[0] )) { $parts[0] = null; } // checks for invalid printable charactors or control charactors foreach ($parts as $part) { if( preg_match( '|[\^\|\?\*<\":>/\a\b\e\f\n\r\t]|', $part )) { return false; } } return true; } else { // unix always passes return true; } } function checkCurrentOS($operatingSystem) { $currentOS = substr( php_uname(), 0, 7 ) == "Windows" ? "Win" : "_Nix"; if ( strcmp( $operatingSystem, $currentOS ) == 0 ) { return true; } else { return false; } } ?> ---- Server IP: 66.163.161.117 Probable Submitter: 75.7.35.22 ---- Manual Page -- http://www.php.net/manual/en/ref.filesystem.php Edit -- https://master.php.net/note/edit/72052 Del: integrated -- https://master.php.net/note/delete/72052/integrated Del: useless -- https://master.php.net/note/delete/72052/useless Del: bad code -- https://master.php.net/note/delete/72052/bad+code Del: spam -- https://master.php.net/note/delete/72052/spam Del: non-english -- https://master.php.net/note/delete/72052/non-english Del: in docs -- https://master.php.net/note/delete/72052/in+docs Del: other reasons-- https://master.php.net/note/delete/72052 Reject -- https://master.php.net/note/reject/72052 Search -- https://master.php.net/manage/user-notes.php