[PHP] Using str_replace to replace UTF-8 characters?

Vanneto

Hey everyone,

I have a small problem, I have the following script that replaces characters like ü, ö (German characters) with ue, oe, etc. Here is the script:

#SelectExpand
  1<?php

  3error_reporting(E_ALL);

  5$dbhost = 'localhost';
  6$dbuser = 'root';
  7$dbpass = '';

  9mysql_connect($dbhost, $dbuser, $dbpass) or die(mysql_error());
 10mysql_select_db('stavki');

 12/*mysql_set_charset('utf-8');*/
 13mysql_query("SET CHARSET utf-8");

 15if(isset($_POST['dodaj']))
 16{
      $input2 = $_POST['input'];
      
      $vn = array('ö', 'ü', 'ä', 'ß', 'Ö', 'Ü', 'Ä', 'Š', 'È', 'Ž', 'š', 'è', 'ž');
  $not = array('oe', 'ue', 'ae', 'ss', 'OE', 'UE', 'AE', 'S', 'C', 'Z', 's', 'c', 'z');
  
  $input = str_replace($vn, $not, $input2);
  
      $besede = explode(" ", $input);

      $stavki = mysql_query("SELECT * FROM stavki") or die(mysql_error());
      
      echo "IZPIŠEMO VSE MOŽNE BESEDE, KI JIH JE VPISAL UPORABNIK";
      echo "<pre>";
      print_r($besede);
      echo "</pre>";
      echo "<hr />";
      
      while($kos = mysql_fetch_array($stavki))
      {
              
              $vprasanje = $kos['vpr'];
              $odgovor = $kos['odg'];
              
              $vpr2 = str_replace($vn, $not, $vprasanje);
              
              echo "Debug:<BR />Odgovor: ".$odgovor."<br />";
              echo "Vprašanje: ".$vpr2."<br />";
              $a = 0;
              foreach($besede as $beseda)
              {
                      if(stristr($vpr2, $beseda))
                      {
                              $a = $a + 1;
                              echo "<font color=\"green\"><b>".$beseda."</b></font> ";
                      }
                      else
                      {
                              echo "<font color=\"red\">".$beseda."</font> ";
                      }
              }
              echo "<hr />";
              
              $konec[] = array("st_ujemanj" => $a, "vpr" => $vprasanje, "odg" => $odgovor);
      }
      array_multisort($konec, SORT_DESC);
      echo "<pre>";
      print_r($konec);
      echo "</pre>";
      echo "<hr />";
      echo "<b>".$_POST['input']."</b> ";
      echo $konec[0]['odg'];
      
 69}
 70?>

 72<form action="" method="post">
      Vprašanje: <input type="text" name="input" /><br />
      <input type="submit" name="dodaj" />
 75</form>

Note: not my code

I guess what it comes down to is this:

#SelectExpand
  1<?php
  2
  3if(isset($_POST['dodaj']))
  4{
  5        $input2 = $_POST['input'];
  6        
  7        $vn = array('ö', 'ü', 'ä', 'ß', 'Ö', 'Ü', 'Ä', 'Š', 'È', 'Ž', 'š', 'è', 'ž');
  8    $not = array('oe', 'ue', 'ae', 'ss', 'OE', 'UE', 'AE', 'S', 'C', 'Z', 's', 'c', 'z');
  9    
 10    $input = str_replace($vn, $not, $input2);
 11    
 12        echo $input;
 13
 14        
 15}
 16?>
 17 
 18<form action="" method="post">
 19        Vprašanje: <input type="text" name="input" /><br />
 20        <input type="submit" name="dodaj" />
 21</form>

I input ü and it outputs ü. Does anyone know how to solve this? Maybe using the MultiByte extension? But AFAIK, it doesnt have a mb_str_replace(). I would really appreciate any help or suggestions.

Thank you.

CGamesPlay

Adding header("Content-type: text/html; charset=utf-8"); to the top of the file causes the script to work on my server. I don't know why though

[append]

The behavior is that the browser sends the form data in the same character set as the page that contained the form, and this is supported by this page, but I haven't found anything on W3C.

Matthew Leverton

First, make sure you are explicitly setting the character encoding type. If you set it to UTF-8, then you only have to handle one case.

Second, make sure your file is saved in UTF-8.

Then it will work.

Reason:

The character: "ö" might be stored as 0xF6 (ASCII) or 0xC3B6 (UTF-8) or 0x00F6 (UTF-16) or 0x000000F6 (UTF-32) in your file.

In addition to those types, the browser may submit it as ö or ö or ö. (Although for characters < 256, the default is probably always ASCII.)

A naive search and replace will only work if both encoding types are the same.

ImLeftFooted

Maybe if you stopped killing kittens your code would work :-X

Tobias Dammers

My advice: use UTF-8 for everything. This includes:
- The source file itself
- PHP's multibyte support (mb_encoding() etc.)
- The database collation (if possible)
- Content-type header

Thread #601771. Printed from Allegro.cc