libraries/charset_conversion.lib.php

   1 <?php
   2 /* vim: set expandtab sw=4 ts=4 sts=4: */
   3 /**
   4  * Charset conversion functions.
   5  *
   6  * @package phpMyAdmin
   7  */
   8 if (! defined('PHPMYADMIN')) {
   9     exit;
  10 }
  11
  12 define('PMA_CHARSET_NONE', 0);
  13 define('PMA_CHARSET_ICONV', 1);
  14 define('PMA_CHARSET_RECODE', 2);
  15 define('PMA_CHARSET_ICONV_AIX', 3);
  16
  17 // Finally detect which function we will use:
  18 if ($cfg['RecodingEngine'] == 'iconv') {
  19     if (@function_exists('iconv')) {
  20         if ((@stristr(PHP_OS, 'AIX')) && (@strcasecmp(ICONV_IMPL, 'unknown') == 0) && (@strcasecmp(ICONV_VERSION, 'unknown') == 0)) {
  21             $PMA_recoding_engine = PMA_CHARSET_ICONV_AIX;
  22         } else {
  23             $PMA_recoding_engine = PMA_CHARSET_ICONV;
  24         }
  25     } else {
  26         $PMA_recoding_engine = PMA_CHARSET_NONE;
  27         PMA_warnMissingExtension('iconv');
  28     }
  29 } elseif ($cfg['RecodingEngine'] == 'recode') {
  30     if (@function_exists('recode_string')) {
  31         $PMA_recoding_engine = PMA_CHARSET_RECODE;
  32     } else {
  33         $PMA_recoding_engine = PMA_CHARSET_NONE;
  34         PMA_warnMissingExtension('recode');
  35     }
  36 } elseif ($cfg['RecodingEngine'] == 'auto') {
  37     if (@function_exists('iconv')) {
  38         if ((@stristr(PHP_OS, 'AIX')) && (@strcasecmp(ICONV_IMPL, 'unknown') == 0) && (@strcasecmp(ICONV_VERSION, 'unknown') == 0)) {
  39             $PMA_recoding_engine = PMA_CHARSET_ICONV_AIX;
  40         } else {
  41             $PMA_recoding_engine = PMA_CHARSET_ICONV;
  42         }
  43     } elseif (@function_exists('recode_string')) {
  44         $PMA_recoding_engine = PMA_CHARSET_RECODE;
  45     } else {
  46         $PMA_recoding_engine = PMA_CHARSET_NONE;
  47     }
  48 } else {
  49     $PMA_recoding_engine = PMA_CHARSET_NONE;
  50 }
  51
  52 /* Load AIX iconv wrapper if needed */
  53 if ($PMA_recoding_engine == PMA_CHARSET_ICONV_AIX) {
  54     require_once './libraries/iconv_wrapper.lib.php';
  55 }
  56
  57 /**
  58  * Converts encoding of text according to parameters with detected
  59  * conversion function.
  60  *
  61  * @param   string   source charset
  62  * @param   string   target charset
  63  * @param   string   what to convert
  64  *
  65  * @return  string   converted text
  66  *
  67  * @access  public
  68  *
  69  */
  70 function PMA_convert_string($src_charset, $dest_charset, $what) {
  71     if ($src_charset == $dest_charset) {
  72         return $what;
  73     }
  74     switch ($GLOBALS['PMA_recoding_engine']) {
  75         case PMA_CHARSET_RECODE:
  76             return recode_string($src_charset . '..'  . $dest_charset, $what);
  77         case PMA_CHARSET_ICONV:
  78             return iconv($src_charset, $dest_charset . $GLOBALS['cfg']['IconvExtraParams'], $what);
  79         case PMA_CHARSET_ICONV_AIX:
  80             return PMA_aix_iconv_wrapper($src_charset, $dest_charset . $GLOBALS['cfg']['IconvExtraParams'], $what);
  81         default:
  82             return $what;
  83     }
  84 } //  end of the "PMA_convert_string()" function
  85
  86 ?>