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<?php
/**
* I18N Utility file.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the BSD License.
*
* Copyright(c) 2004 by Wei Zhuo. All rights reserved.
*
* To contact the author write to <weizhuo[at]gmail[dot]com>
* The latest version of PRADO can be obtained from:
* {@link http://prado.sourceforge.net/}
*
* @author Wei Zhuo <weizhuo[at]gmail[dot]com>
* @version $Revision: 1.3 $ $Date: 2005/08/27 03:21:12 $
* @package System.I18N.core
*/
/**
* For a given DSN (database connection string), return some information
* about the DSN. This function comes from PEAR's DB package.
* @param string DSN format, similar to PEAR's DB
* @return array DSN information.
*/
function parseDSN($dsn)
{
if (is_array($dsn)) {
return $dsn;
}
$parsed = array(
'phptype' => false,
'dbsyntax' => false,
'username' => false,
'password' => false,
'protocol' => false,
'hostspec' => false,
'port' => false,
'socket' => false,
'database' => false
);
// Find phptype and dbsyntax
if (($pos = strpos($dsn, '://')) !== false) {
$str = substr($dsn, 0, $pos);
$dsn = substr($dsn, $pos + 3);
} else {
$str = $dsn;
$dsn = NULL;
}
// Get phptype and dbsyntax
// $str => phptype(dbsyntax)
if (preg_match('|^(.+?)\((.*?)\)$|', $str, $arr)) {
$parsed['phptype'] = $arr[1];
$parsed['dbsyntax'] = (empty($arr[2])) ? $arr[1] : $arr[2];
} else {
$parsed['phptype'] = $str;
$parsed['dbsyntax'] = $str;
}
if (empty($dsn)) {
return $parsed;
}
// Get (if found): username and password
// $dsn => username:password@protocol+hostspec/database
if (($at = strrpos($dsn,'@')) !== false) {
$str = substr($dsn, 0, $at);
$dsn = substr($dsn, $at + 1);
if (($pos = strpos($str, ':')) !== false) {
$parsed['username'] = rawurldecode(substr($str, 0, $pos));
$parsed['password'] = rawurldecode(substr($str, $pos + 1));
} else {
$parsed['username'] = rawurldecode($str);
}
}
// Find protocol and hostspec
// $dsn => proto(proto_opts)/database
if (preg_match('|^([^(]+)\((.*?)\)/?(.*?)$|', $dsn, $match)) {
$proto = $match[1];
$proto_opts = (!empty($match[2])) ? $match[2] : false;
$dsn = $match[3];
// $dsn => protocol+hostspec/database (old format)
} else {
if (strpos($dsn, '+') !== false) {
list($proto, $dsn) = explode('+', $dsn, 2);
}
if (strpos($dsn, '/') !== false) {
list($proto_opts, $dsn) = explode('/', $dsn, 2);
} else {
$proto_opts = $dsn;
$dsn = null;
}
}
// process the different protocol options
$parsed['protocol'] = (!empty($proto)) ? $proto : 'tcp';
$proto_opts = rawurldecode($proto_opts);
if ($parsed['protocol'] == 'tcp') {
if (strpos($proto_opts, ':') !== false) {
list($parsed['hostspec'], $parsed['port']) = explode(':', $proto_opts);
} else {
$parsed['hostspec'] = $proto_opts;
}
} elseif ($parsed['protocol'] == 'unix') {
$parsed['socket'] = $proto_opts;
}
// Get dabase if any
// $dsn => database
if (!empty($dsn)) {
// /database
if (($pos = strpos($dsn, '?')) === false) {
$parsed['database'] = $dsn;
// /database?param1=value1¶m2=value2
} else {
$parsed['database'] = substr($dsn, 0, $pos);
$dsn = substr($dsn, $pos + 1);
if (strpos($dsn, '&') !== false) {
$opts = explode('&', $dsn);
} else { // database?param1=value1
$opts = array($dsn);
}
foreach ($opts as $opt) {
list($key, $value) = explode('=', $opt);
if (!isset($parsed[$key])) { // don't allow params overwrite
$parsed[$key] = rawurldecode($value);
}
}
}
}
return $parsed;
}
/**
* Convert strings to UTF-8 via iconv. NB, the result may not by UTF-8
* if the conversion failed.
* @param string string to convert to UTF-8
* @return string UTF-8 encoded string, original string if iconv failed.
*/
function I18N_toUTF8($string, $from)
{
if($from != 'UTF-8')
{
$s = iconv($from,'UTF-8',$string); //to UTF-8
return $s !== false ? $s : $string; //it could return false
}
return $string;
}
/**
* Convert UTF-8 strings to a different encoding. NB. The result
* may not have been encoded if iconv fails.
* @param string the UTF-8 string for conversion
* @return string encoded string.
*/
function I18N_toEncoding($string, $to)
{
if($to != 'UTF-8')
{
$s = iconv('UTF-8', $to, $string);
return $s !== false ? $s : $string;
}
return $string;
}
?>
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