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<?php
/*
+-----------------------------------------------------------------------+
| rcube_shared.inc |
| |
| This file is part of the RoundCube PHP suite |
| Copyright (C) 2005-2007, RoundCube Dev. - Switzerland |
| Licensed under the GNU GPL |
| |
| CONTENTS: |
| Shared functions and classes used in PHP projects |
| |
+-----------------------------------------------------------------------+
| Author: Thomas Bruederli <roundcube@gmail.com> |
+-----------------------------------------------------------------------+
$Id: rcube_shared.inc 1026 2008-02-07 07:50:37Z thomasb $
*/
/**
* RoundCube shared functions
*
* @package Core
*/
/**
* Provide details about the client's browser
*
* @return array Key-value pairs of browser properties
*/
function rcube_browser()
{
$HTTP_USER_AGENT = $_SERVER['HTTP_USER_AGENT'];
$bw['ver'] = 0;
$bw['win'] = stristr($HTTP_USER_AGENT, 'win');
$bw['mac'] = stristr($HTTP_USER_AGENT, 'mac');
$bw['linux'] = stristr($HTTP_USER_AGENT, 'linux');
$bw['unix'] = stristr($HTTP_USER_AGENT, 'unix');
$bw['ns4'] = stristr($HTTP_USER_AGENT, 'mozilla/4') && !stristr($HTTP_USER_AGENT, 'msie');
$bw['ns'] = ($bw['ns4'] || stristr($HTTP_USER_AGENT, 'netscape'));
$bw['ie'] = stristr($HTTP_USER_AGENT, 'msie');
$bw['mz'] = stristr($HTTP_USER_AGENT, 'mozilla/5');
$bw['opera'] = stristr($HTTP_USER_AGENT, 'opera');
$bw['safari'] = stristr($HTTP_USER_AGENT, 'safari');
if($bw['ns'])
{
$test = eregi("mozilla\/([0-9\.]+)", $HTTP_USER_AGENT, $regs);
$bw['ver'] = $test ? (float)$regs[1] : 0;
}
if($bw['mz'])
{
$test = ereg("rv:([0-9\.]+)", $HTTP_USER_AGENT, $regs);
$bw['ver'] = $test ? (float)$regs[1] : 0;
}
if($bw['ie'])
{
$test = eregi("msie ([0-9\.]+)", $HTTP_USER_AGENT, $regs);
$bw['ver'] = $test ? (float)$regs[1] : 0;
}
if($bw['opera'])
{
$test = eregi("opera ([0-9\.]+)", $HTTP_USER_AGENT, $regs);
$bw['ver'] = $test ? (float)$regs[1] : 0;
}
if(eregi(" ([a-z]{2})-([a-z]{2})", $HTTP_USER_AGENT, $regs))
$bw['lang'] = $regs[1];
else
$bw['lang'] = 'en';
$bw['dom'] = ($bw['mz'] || $bw['safari'] || ($bw['ie'] && $bw['ver']>=5) || ($bw['opera'] && $bw['ver']>=7));
$bw['pngalpha'] = $bw['mz'] || $bw['safari'] || ($bw['ie'] && $bw['ver']>=5.5) ||
($bw['ie'] && $bw['ver']>=5 && $bw['mac']) || ($bw['opera'] && $bw['ver']>=7) ? TRUE : FALSE;
return $bw;
}
/**
* Get localized text in the desired language
*
* @param mixed Named parameters array or label name
* @return string Localized text
*/
function rcube_label($attrib)
{
global $sess_user_lang, $INSTALL_PATH, $OUTPUT;
static $sa_text_data, $s_language, $utf8_decode;
// extract attributes
if (is_string($attrib))
$attrib = array('name' => $attrib);
$nr = is_numeric($attrib['nr']) ? $attrib['nr'] : 1;
$vars = isset($attrib['vars']) ? $attrib['vars'] : '';
$command_name = !empty($attrib['command']) ? $attrib['command'] : NULL;
$alias = $attrib['name'] ? $attrib['name'] : ($command_name && $command_label_map[$command_name] ? $command_label_map[$command_name] : '');
// load localized texts
if (!$sa_text_data || $s_language != $sess_user_lang)
{
$sa_text_data = array();
// get english labels (these should be complete)
@include($INSTALL_PATH.'program/localization/en_US/labels.inc');
@include($INSTALL_PATH.'program/localization/en_US/messages.inc');
if (is_array($labels))
$sa_text_data = $labels;
if (is_array($messages))
$sa_text_data = array_merge($sa_text_data, $messages);
// include user language files
if ($sess_user_lang!='en' && is_dir($INSTALL_PATH.'program/localization/'.$sess_user_lang))
{
include_once($INSTALL_PATH.'program/localization/'.$sess_user_lang.'/labels.inc');
include_once($INSTALL_PATH.'program/localization/'.$sess_user_lang.'/messages.inc');
if (is_array($labels))
$sa_text_data = array_merge($sa_text_data, $labels);
if (is_array($messages))
$sa_text_data = array_merge($sa_text_data, $messages);
}
$s_language = $sess_user_lang;
}
// text does not exist
if (!($text_item = $sa_text_data[$alias]))
{
/*
raise_error(array(
'code' => 500,
'type' => 'php',
'line' => __LINE__,
'file' => __FILE__,
'message' => "Missing localized text for '$alias' in '$sess_user_lang'"), TRUE, FALSE);
*/
return "[$alias]";
}
// make text item array
$a_text_item = is_array($text_item) ? $text_item : array('single' => $text_item);
// decide which text to use
if ($nr==1)
$text = $a_text_item['single'];
else if ($nr>0)
$text = $a_text_item['multiple'];
else if ($nr==0)
{
if ($a_text_item['none'])
$text = $a_text_item['none'];
else if ($a_text_item['single'])
$text = $a_text_item['single'];
else if ($a_text_item['multiple'])
$text = $a_text_item['multiple'];
}
// default text is single
if ($text=='')
$text = $a_text_item['single'];
// replace vars in text
if (is_array($attrib['vars']))
{
foreach ($attrib['vars'] as $var_key=>$var_value)
$a_replace_vars[substr($var_key, 0, 1)=='$' ? substr($var_key, 1) : $var_key] = $var_value;
}
if ($a_replace_vars)
$text = preg_replace('/\${?([_a-z]{1}[_a-z0-9]*)}?/ei', '$a_replace_vars["\1"]', $text);
// remove variables in text which were not available in arg $vars and $nr
eval("\$text = <<<EOF
$text
EOF;
");
// format output
if (($attrib['uppercase'] && strtolower($attrib['uppercase']=='first')) || $attrib['ucfirst'])
return ucfirst($text);
else if ($attrib['uppercase'])
return strtoupper($text);
else if ($attrib['lowercase'])
return strtolower($text);
return $text;
}
/**
* Send HTTP headers to prevent caching this page
*/
function send_nocacheing_headers()
{
if (headers_sent())
return;
header("Expires: ".gmdate("D, d M Y H:i:s")." GMT");
header("Last-Modified: ".gmdate("D, d M Y H:i:s")." GMT");
header("Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0");
header("Pragma: no-cache");
}
/**
* Send header with expire date 30 days in future
*
* @param int Expiration time in seconds
*/
function send_future_expire_header($offset=2600000)
{
if (headers_sent())
return;
header("Expires: ".gmdate("D, d M Y H:i:s", mktime()+$offset)." GMT");
header("Cache-Control: max-age=$offset");
header("Pragma: ");
}
/**
* Check request for If-Modified-Since and send an according response.
* This will terminate the current script if headers match the given values
*
* @param int Modified date as unix timestamp
* @param string Etag value for caching
*/
function send_modified_header($mdate, $etag=null)
{
if (headers_sent())
return;
$iscached = false;
if ($_SERVER['HTTP_IF_MODIFIED_SINCE'] && strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE']) >= $mdate)
$iscached = true;
$etag = $etag ? "\"$etag\"" : null;
if ($etag && $_SERVER['HTTP_IF_NONE_MATCH'] == $etag)
$iscached = true;
if ($iscached)
header("HTTP/1.x 304 Not Modified");
else
header("Last-Modified: ".gmdate("D, d M Y H:i:s", $mdate)." GMT");
header("Cache-Control: max-age=0");
header("Expires: ");
header("Pragma: ");
if ($etag)
header("Etag: $etag");
if ($iscached)
exit;
}
/**
* Convert a variable into a javascript object notation
*
* @param mixed Input value
* @return string Serialized JSON string
*/
function json_serialize($var)
{
if (is_object($var))
$var = get_object_vars($var);
if (is_array($var))
{
// empty array
if (!sizeof($var))
return '[]';
else
{
$keys_arr = array_keys($var);
$is_assoc = $have_numeric = 0;
for ($i=0; $i<sizeof($keys_arr); ++$i)
{
if (is_numeric($keys_arr[$i]))
$have_numeric = 1;
if (!is_numeric($keys_arr[$i]) || $keys_arr[$i] != $i)
$is_assoc = 1;
if ($is_assoc && $have_numeric)
break;
}
$brackets = $is_assoc ? '{}' : '[]';
$pairs = array();
foreach ($var as $key => $value)
{
// enclose key with quotes if it is not variable-name conform
if (!ereg("^[_a-zA-Z]{1}[_a-zA-Z0-9]*$", $key) /* || is_js_reserved_word($key) */)
$key = "'$key'";
$pairs[] = sprintf("%s%s", $is_assoc ? "$key:" : '', json_serialize($value));
}
return $brackets{0} . implode(',', $pairs) . $brackets{1};
}
}
else if (is_numeric($var) && strval(intval($var)) === strval($var))
return $var;
else if (is_bool($var))
return $var ? '1' : '0';
else
return "'".JQ($var)."'";
}
/**
* Function to convert an array to a javascript array
* Actually an alias function for json_serialize()
* @deprecated
*/
function array2js($arr, $type='')
{
return json_serialize($arr);
}
/**
* Similar function as in_array() but case-insensitive
*
* @param mixed Needle value
* @param array Array to search in
* @return boolean True if found, False if not
*/
function in_array_nocase($needle, $haystack)
{
foreach ($haystack as $value)
if (strtolower($needle)===strtolower($value))
return true;
return false;
}
/**
* Find out if the string content means TRUE or FALSE
*
* @param string Input value
* @return boolean Imagine what!
*/
function get_boolean($str)
{
$str = strtolower($str);
if(in_array($str, array('false', '0', 'no', 'nein', ''), TRUE))
return FALSE;
else
return TRUE;
}
/**
* Parse a human readable string for a number of bytes
*
* @param string Input string
* @return int Number of bytes
*/
function parse_bytes($str)
{
if (is_numeric($str))
return intval($str);
if (preg_match('/([0-9]+)([a-z])/i', $str, $regs))
{
$bytes = floatval($regs[1]);
switch (strtolower($regs[2]))
{
case 'g':
$bytes *= 1073741824;
break;
case 'm':
$bytes *= 1048576;
break;
case 'k':
$bytes *= 1024;
break;
}
}
return intval($bytes);
}
/**
* Create a human readable string for a number of bytes
*
* @param int Number of bytes
* @return string Byte string
*/
function show_bytes($bytes)
{
if ($bytes > 1073741824)
{
$gb = $bytes/1073741824;
$str = sprintf($gb>=10 ? "%d GB" : "%.1f GB", $gb);
}
else if ($bytes > 1048576)
{
$mb = $bytes/1048576;
$str = sprintf($mb>=10 ? "%d MB" : "%.1f MB", $mb);
}
else if ($bytes > 1024)
$str = sprintf("%d KB", round($bytes/1024));
else
$str = sprintf('%d B', $bytes);
return $str;
}
/**
* Convert paths like ../xxx to an absolute path using a base url
*
* @param string Relative path
* @param string Base URL
* @return string Absolute URL
*/
function make_absolute_url($path, $base_url)
{
$host_url = $base_url;
$abs_path = $path;
// check if path is an absolute URL
if (preg_match('/^[fhtps]+:\/\//', $path))
return $path;
// cut base_url to the last directory
if (strpos($base_url, '/')>7)
{
$host_url = substr($base_url, 0, strpos($base_url, '/'));
$base_url = substr($base_url, 0, strrpos($base_url, '/'));
}
// $path is absolute
if ($path{0}=='/')
$abs_path = $host_url.$path;
else
{
// strip './' because its the same as ''
$path = preg_replace('/^\.\//', '', $path);
if (preg_match_all('/\.\.\//', $path, $matches, PREG_SET_ORDER))
foreach ($matches as $a_match)
{
if (strrpos($base_url, '/'))
$base_url = substr($base_url, 0, strrpos($base_url, '/'));
$path = substr($path, 3);
}
$abs_path = $base_url.'/'.$path;
}
return $abs_path;
}
/**
* Wrapper function for strlen
*/
function rc_strlen($str)
{
if (function_exists('mb_strlen'))
return mb_strlen($str);
else
return strlen($str);
}
/**
* Wrapper function for strtolower
*/
function rc_strtolower($str)
{
if (function_exists('mb_strtolower'))
return mb_strtolower($str);
else
return strtolower($str);
}
/**
* Wrapper function for substr
*/
function rc_substr($str, $start, $len=null)
{
if (function_exists('mb_substr'))
return mb_substr($str, $start, $len);
else
return substr($str, $start, $len);
}
/**
* Wrapper function for strpos
*/
function rc_strpos($haystack, $needle, $offset=0)
{
if (function_exists('mb_strpos'))
return mb_strpos($haystack, $needle, $offset);
else
return strpos($haystack, $needle, $offset);
}
/**
* Wrapper function for strrpos
*/
function rc_strrpos($haystack, $needle, $offset=0)
{
if (function_exists('mb_strrpos'))
return mb_strrpos($haystack, $needle, $offset);
else
return strrpos($haystack, $needle, $offset);
}
/**
* Read a specific HTTP request header
*
* @access static
* @param string $name Header name
* @return mixed Header value or null if not available
*/
function rc_request_header($name)
{
if (function_exists('getallheaders'))
{
$hdrs = array_change_key_case(getallheaders(), CASE_UPPER);
$key = strtoupper($name);
}
else
{
$key = 'HTTP_' . strtoupper(strtr($name, '-', '_'));
$hdrs = array_change_key_case($_SERVER, CASE_UPPER);
}
return $hdrs[$key];
}
/**
* Replace the middle part of a string with ...
* if it is longer than the allowed length
*
* @param string Input string
* @param int Max. length
* @param string Replace removed chars with this
* @return string Abbreviated string
*/
function abbreviate_string($str, $maxlength, $place_holder='...')
{
$length = rc_strlen($str);
$first_part_length = floor($maxlength/2) - rc_strlen($place_holder);
if ($length > $maxlength)
{
$second_starting_location = $length - $maxlength + $first_part_length + 1;
$str = rc_substr($str, 0, $first_part_length) . $place_holder . rc_substr($str, $second_starting_location, $length);
}
return $str;
}
/**
* Make sure the string ends with a slash
*/
function slashify($str)
{
return unslashify($str).'/';
}
/**
* Remove slash at the end of the string
*/
function unslashify($str)
{
return preg_replace('/\/$/', '', $str);
}
/**
* Delete all files within a folder
*
* @param string Path to directory
* @return boolean True on success, False if directory was not found
*/
function clear_directory($dir_path)
{
$dir = @opendir($dir_path);
if(!$dir) return FALSE;
while ($file = readdir($dir))
if (strlen($file)>2)
unlink("$dir_path/$file");
closedir($dir);
return TRUE;
}
/**
* Create a unix timestamp with a specified offset from now
*
* @param string String representation of the offset (e.g. 20min, 5h, 2days)
* @param int Factor to multiply with the offset
* @return int Unix timestamp
*/
function get_offset_time($offset_str, $factor=1)
{
if (preg_match('/^([0-9]+)\s*([smhdw])/i', $offset_str, $regs))
{
$amount = (int)$regs[1];
$unit = strtolower($regs[2]);
}
else
{
$amount = (int)$offset_str;
$unit = 's';
}
$ts = mktime();
switch ($unit)
{
case 'w':
$amount *= 7;
case 'd':
$amount *= 24;
case 'h':
$amount *= 60;
case 'm':
$amount *= 60;
case 's':
$ts += $amount * $factor;
}
return $ts;
}
/**
* Return the last occurence of a string in another string
*
* @param haystack string string in which to search
* @param needle string string for which to search
* @return index of needle within haystack, or false if not found
*/
function strrstr($haystack, $needle)
{
$pver = phpversion();
if ($pver[0] >= 5)
return strrpos($haystack, $needle);
else
{
$index = strpos(strrev($haystack), strrev($needle));
if($index === false)
return false;
$index = strlen($haystack) - strlen($needle) - $index;
return $index;
}
}
?>
