4 +-----------------------------------------------------------------------+
7 | This file is part of the RoundCube PHP suite |
8 | Copyright (C) 2005-2007, RoundCube Dev. - Switzerland |
9 | Licensed under the GNU GPL |
12 | Shared functions and classes used in PHP projects |
14 +-----------------------------------------------------------------------+
15 | Author: Thomas Bruederli <roundcube@gmail.com> |
16 +-----------------------------------------------------------------------+
18 $Id: rcube_shared.inc 2313 2009-02-27 10:18:18Z thomasb $
24 * RoundCube shared functions
31 * Send HTTP headers to prevent caching this page
33 function send_nocacheing_headers()
38 header("Expires: ".gmdate("D, d M Y H:i:s")." GMT");
39 header("Last-Modified: ".gmdate("D, d M Y H:i:s")." GMT");
40 header("Cache-Control: private, must-revalidate, post-check=0, pre-check=0");
41 header("Pragma: no-cache");
43 // We need to set the following headers to make downloads work using IE in HTTPS mode.
44 if (isset($_SERVER['HTTPS'])) {
46 header('Cache-Control: ');
52 * Send header with expire date 30 days in future
54 * @param int Expiration time in seconds
56 function send_future_expire_header($offset=2600000)
61 header("Expires: ".gmdate("D, d M Y H:i:s", mktime()+$offset)." GMT");
62 header("Cache-Control: max-age=$offset");
68 * Check request for If-Modified-Since and send an according response.
69 * This will terminate the current script if headers match the given values
71 * @param int Modified date as unix timestamp
72 * @param string Etag value for caching
74 function send_modified_header($mdate, $etag=null, $skip_check=false)
80 $etag = $etag ? "\"$etag\"" : null;
84 if ($_SERVER['HTTP_IF_MODIFIED_SINCE'] && strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE']) >= $mdate)
88 $iscached = ($_SERVER['HTTP_IF_NONE_MATCH'] == $etag);
92 header("HTTP/1.x 304 Not Modified");
94 header("Last-Modified: ".gmdate("D, d M Y H:i:s", $mdate)." GMT");
96 header("Cache-Control: max-age=0");
101 header("Etag: $etag");
112 * Returns whether an $str is a reserved word for any of the version of Javascript or ECMAScript
113 * @param str String to check
114 * @return boolean True if $str is a reserver word, False if not
116 function is_js_reserved_word($str)
118 return in_array($str, array(
119 // ECMASript ver 4 reserved words
120 'as','break','case','catch','class','const','continue',
121 'default','delete','do','else','export','extends','false','finally','for','function',
122 'if','import','in','instanceof','is','namespace','new','null','package','private',
123 'public','return','super','switch','this','throw','true','try','typeof','use','var',
124 'void','while','with',
125 // ECMAScript ver 4 future reserved words
126 'abstract','debugger','enum','goto','implements','interface','native','protected',
127 'synchronized','throws','transient','volatile',
128 // special meaning in some contexts
130 // were reserved in ECMAScript ver 3
131 'boolean','byte','char','double','final','float','int','long','short','static'
137 * Convert a variable into a javascript object notation
139 * @param mixed Input value
140 * @return string Serialized JSON string
142 function json_serialize($var)
145 $var = get_object_vars($var);
154 $keys_arr = array_keys($var);
155 $is_assoc = $have_numeric = 0;
157 for ($i=0; $i<sizeof($keys_arr); ++$i)
159 if (is_numeric($keys_arr[$i]))
161 if (!is_numeric($keys_arr[$i]) || $keys_arr[$i] != $i)
163 if ($is_assoc && $have_numeric)
167 $brackets = $is_assoc ? '{}' : '[]';
170 foreach ($var as $key => $value)
172 // enclose key with quotes if it is not variable-name conform
173 if (!ereg("^[_a-zA-Z]{1}[_a-zA-Z0-9]*$", $key) || is_js_reserved_word($key))
176 $pairs[] = sprintf("%s%s", $is_assoc ? "$key:" : '', json_serialize($value));
179 return $brackets{0} . implode(',', $pairs) . $brackets{1};
182 else if (!is_string($var) && strval(intval($var)) === strval($var))
184 else if (is_bool($var))
185 return $var ? '1' : '0';
187 return "'".JQ($var)."'";
193 * Function to convert an array to a javascript array
194 * Actually an alias function for json_serialize()
197 function array2js($arr, $type='')
199 return json_serialize($arr);
204 * Similar function as in_array() but case-insensitive
206 * @param mixed Needle value
207 * @param array Array to search in
208 * @return boolean True if found, False if not
210 function in_array_nocase($needle, $haystack)
212 $needle = rc_strtolower($needle);
213 foreach ($haystack as $value)
214 if ($needle===rc_strtolower($value))
222 * Find out if the string content means TRUE or FALSE
224 * @param string Input value
225 * @return boolean Imagine what!
227 function get_boolean($str)
229 $str = strtolower($str);
230 if(in_array($str, array('false', '0', 'no', 'nein', ''), TRUE))
238 * Parse a human readable string for a number of bytes
240 * @param string Input string
241 * @return int Number of bytes
243 function parse_bytes($str)
245 if (is_numeric($str))
248 if (preg_match('/([0-9]+)([a-z])/i', $str, $regs))
250 $bytes = floatval($regs[1]);
251 switch (strtolower($regs[2]))
254 $bytes *= 1073741824;
265 return intval($bytes);
269 * Create a human readable string for a number of bytes
271 * @param int Number of bytes
272 * @return string Byte string
274 function show_bytes($bytes)
276 if ($bytes > 1073741824)
278 $gb = $bytes/1073741824;
279 $str = sprintf($gb>=10 ? "%d " : "%.1f ", $gb) . rcube_label('GB');
281 else if ($bytes > 1048576)
283 $mb = $bytes/1048576;
284 $str = sprintf($mb>=10 ? "%d " : "%.1f ", $mb) . rcube_label('MB');
286 else if ($bytes > 1024)
287 $str = sprintf("%d ", round($bytes/1024)) . rcube_label('KB');
289 $str = sprintf('%d ', $bytes) . rcube_label('B');
296 * Convert paths like ../xxx to an absolute path using a base url
298 * @param string Relative path
299 * @param string Base URL
300 * @return string Absolute URL
302 function make_absolute_url($path, $base_url)
304 $host_url = $base_url;
307 // check if path is an absolute URL
308 if (preg_match('/^[fhtps]+:\/\//', $path))
311 // cut base_url to the last directory
312 if (strrpos($base_url, '/')>7)
314 $host_url = substr($base_url, 0, strpos($base_url, '/'));
315 $base_url = substr($base_url, 0, strrpos($base_url, '/'));
320 $abs_path = $host_url.$path;
323 // strip './' because its the same as ''
324 $path = preg_replace('/^\.\//', '', $path);
326 if (preg_match_all('/\.\.\//', $path, $matches, PREG_SET_ORDER))
327 foreach ($matches as $a_match)
329 if (strrpos($base_url, '/'))
330 $base_url = substr($base_url, 0, strrpos($base_url, '/'));
332 $path = substr($path, 3);
335 $abs_path = $base_url.'/'.$path;
343 * Wrapper function for strlen
345 function rc_strlen($str)
347 if (function_exists('mb_strlen'))
348 return mb_strlen($str);
354 * Wrapper function for strtolower
356 function rc_strtolower($str)
358 if (function_exists('mb_strtolower'))
359 return mb_strtolower($str);
361 return strtolower($str);
365 * Wrapper function for strtoupper
367 function rc_strtoupper($str)
369 if (function_exists('mb_strtoupper'))
370 return mb_strtoupper($str);
372 return strtoupper($str);
376 * Wrapper function for substr
378 function rc_substr($str, $start, $len=null)
380 if (function_exists('mb_substr'))
381 return mb_substr($str, $start, $len);
383 return substr($str, $start, $len);
387 * Wrapper function for strpos
389 function rc_strpos($haystack, $needle, $offset=0)
391 if (function_exists('mb_strpos'))
392 return mb_strpos($haystack, $needle, $offset);
394 return strpos($haystack, $needle, $offset);
398 * Wrapper function for strrpos
400 function rc_strrpos($haystack, $needle, $offset=0)
402 if (function_exists('mb_strrpos'))
403 return mb_strrpos($haystack, $needle, $offset);
405 return strrpos($haystack, $needle, $offset);
410 * Read a specific HTTP request header
413 * @param string $name Header name
414 * @return mixed Header value or null if not available
416 function rc_request_header($name)
418 if (function_exists('getallheaders'))
420 $hdrs = array_change_key_case(getallheaders(), CASE_UPPER);
421 $key = strtoupper($name);
425 $key = 'HTTP_' . strtoupper(strtr($name, '-', '_'));
426 $hdrs = array_change_key_case($_SERVER, CASE_UPPER);
434 * Replace the middle part of a string with ...
435 * if it is longer than the allowed length
437 * @param string Input string
438 * @param int Max. length
439 * @param string Replace removed chars with this
440 * @return string Abbreviated string
442 function abbreviate_string($str, $maxlength, $place_holder='...')
444 $length = rc_strlen($str);
445 $first_part_length = floor($maxlength/2) - rc_strlen($place_holder);
447 if ($length > $maxlength)
449 $second_starting_location = $length - $maxlength + $first_part_length + 1;
450 $str = rc_substr($str, 0, $first_part_length) . $place_holder . rc_substr($str, $second_starting_location, $length);
458 * Make sure the string ends with a slash
460 function slashify($str)
462 return unslashify($str).'/';
467 * Remove slash at the end of the string
469 function unslashify($str)
471 return preg_replace('/\/$/', '', $str);
476 * Delete all files within a folder
478 * @param string Path to directory
479 * @return boolean True on success, False if directory was not found
481 function clear_directory($dir_path)
483 $dir = @opendir($dir_path);
484 if(!$dir) return FALSE;
486 while ($file = readdir($dir))
488 unlink("$dir_path/$file");
496 * Create a unix timestamp with a specified offset from now
498 * @param string String representation of the offset (e.g. 20min, 5h, 2days)
499 * @param int Factor to multiply with the offset
500 * @return int Unix timestamp
502 function get_offset_time($offset_str, $factor=1)
504 if (preg_match('/^([0-9]+)\s*([smhdw])/i', $offset_str, $regs))
506 $amount = (int)$regs[1];
507 $unit = strtolower($regs[2]);
511 $amount = (int)$offset_str;
527 $ts += $amount * $factor;
535 * A method to guess the mime_type of an attachment.
537 * @param string $path Path to the file.
538 * @param string $name File name (with suffix)
539 * @param string $failover Mime type supplied for failover.
542 * @author Till Klampaeckel <till@php.net>
543 * @see http://de2.php.net/manual/en/ref.fileinfo.php
544 * @see http://de2.php.net/mime_content_type
546 function rc_mime_content_type($path, $name, $failover = 'application/octet-stream')
549 $mime_magic = rcmail::get_instance()->config->get('mime_magic');
550 $mime_ext = @include(RCMAIL_CONFIG_DIR . '/mimetypes.php');
551 $suffix = $name ? substr($name, strrpos($name, '.')+1) : '*';
553 // use file name suffix with hard-coded mime-type map
554 if (is_array($mime_ext)) {
555 $mime_type = $mime_ext[$suffix];
557 // try fileinfo extension if available
559 if (!extension_loaded('fileinfo')) {
560 @dl('fileinfo.' . PHP_SHLIB_SUFFIX);
562 if (function_exists('finfo_open')) {
563 if ($finfo = finfo_open(FILEINFO_MIME, $mime_magic)) {
564 $mime_type = finfo_file($finfo, $path);
569 // try PHP's mime_content_type
570 if (!$mime_type && function_exists('mime_content_type')) {
571 $mime_type = mime_content_type($path);
573 // fall back to user-submitted string
575 $mime_type = $failover;
583 * A method to guess encoding of a string.
585 * @param string $string String.
586 * @param string $failover Default result for failover.
590 function rc_detect_encoding($string, $failover='')
592 if (!function_exists('mb_detect_encoding')) {
596 // FIXME: the order is important, because sometimes
597 // iso string is detected as euc-jp and etc.
599 'UTF-8', 'SJIS', 'BIG5', 'GB2312',
600 'ISO-8859-1', 'ISO-8859-2', 'ISO-8859-3', 'ISO-8859-4',
601 'ISO-8859-5', 'ISO-8859-6', 'ISO-8859-7', 'ISO-8859-8', 'ISO-8859-9',
602 'ISO-8859-10', 'ISO-8859-13', 'ISO-8859-14', 'ISO-8859-15', 'ISO-8859-16',
603 'WINDOWS-1252', 'WINDOWS-1251', 'EUC-JP', 'EUC-TW', 'KOI8-R',
604 'ISO-2022-KR', 'ISO-2022-JP'
607 $result = mb_detect_encoding($string, join(',', $enc));
609 return $result ? $result : $failover;
614 * Explode quoted string
616 * @param string Delimiter expression string for preg_match()
617 * @param string Input string
619 function rcube_explode_quoted_string($delimiter, $string)
622 $strlen = strlen($string);
624 for ($q=$p=$i=0; $i < $strlen; $i++) {
625 if ($string[$i] == "\"" && $string[$i-1] != "\\") {
626 $q = $q ? false : true;
628 else if (!$q && preg_match("/$delimiter/", $string[$i])) {
629 $result[] = substr($string, $p, $i - $p);
634 $result[] = substr($string, $p);