#20221 [Bgs]: str_replace

Fri, 20 Jun 2003 08:08:37 -0700 

 ID:               20221
 Updated by:       [EMAIL PROTECTED]
 Reported By:      panacode at skynet dot be
 Status:           Bogus
 Bug Type:         Strings related
 Operating System: Linux
 PHP Version:      4.2.3
 New Comment:

In php_str_replace_in_subject(), if a value in the search 
array is of 0 length, the search array internal pointer is 
moved ahead, but not the replace array. Shouldn't they 
both be moved ahead? This would produce the results 
panacode is expecting, but it would break BC, but I don't 
see any documentation that covers this behaviour. Unless 
I'm blind, of course, which I may be. 
 
J 


Previous Comments:
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[2003-06-19 16:29:17] heinz at hhombergs dot de

Sorry but there is a bug in the str_replace function. Reproduced under
4.2.2 and 4.3.2

function recode_charset($string,$cs_from,$cs_to) {
  $trans_tbl["ASCII"] = array("&", "¡", "¢", "£", "¤", "¥", "¦", "§",
"¨", "©", "ª", "«", "¬", "", "®", "¯", "°", "±", "²", "³", "´", "µ",
"¶", "·", "¸", "¹", "º", "»", "¼", "½", "¾", "¿", "À", "Á", "Â", "Ã",
"Ä", "Å", "Æ", "Ç", "È", "É", "Ê", "Ë", "Ì", "Í", "Î", "Ï", "Ð", "Ñ",
"Ò", "Ó", "Ô", "Õ", "Ö", "×", "Ø", "Ù", "Ú", "Û", "Ü", "Ý", "Þ", "ß",
"à", "á", "â", "ã", "ä", "å", "æ", "ç", "è", "é", "ê", "ë", "ì", "í",
"î", "ï", "ð", "ñ", "ò", "ó", "ô", "õ", "ö", "÷", "ø", "ù", "ú", "û",
"ü", "ý", "þ", "ÿ");

  $trans_tbl["UNICODE"] = array("&", "¡", "¢", "£",
"¤", "¥", "¦", "§", "¨", "©", "ª",
"«", "¬", "­", "®", "¯", "°", "±",
"²", "³", "´", "µ", "¶", "·", "¸",
"¹", "º", "»", "¼", "½", "¾", "¿",
"À", "Á", "Â", "Ã", "Ä", "Å", "Æ",
"Ç", "È", "É", "Ê", "Ë", "Ì", "Í",
"Î", "Ï", "Ð", "Ñ", "Ò", "Ó", "Ô",
"Õ", "Ö", "×", "Ø", "Ù", "Ú", "Û",
"Ü", "Ý", "Þ", "ß", "à", "á", "â",
"ã", "ä", "å", "æ", "ç", "è", "é",
"ê", "ë", "ì", "í", "î", "ï", "ð",
"ñ", "ò", "ó", "ô", "õ", "ö", "÷",
"ø", "ù", "ú", "û", "ü", "ý", "þ",
"ÿ");

  $trans_tbl["HTML"] = array("&", "¡", "¢", "£",
"¤", "¥", "¦", "§", "¨", "©", "ª",
"«", "¬", "­", "®", "¯", "°", "±",
"²", "³", "´", "µ", "¶", "·",
"¸", "¹", "º", "»", "¼", "½",
"¾", "¿", "À", "Á", "Â", "Ã",
"Ä", "Å", "Æ", "Ç", "È", "É",
"Ê", "Ë", "Ì", "Í", "Î", "Ï",
"Ð", "Ñ", "Ò", "Ó", "Ô", "Õ",
"Ö", "×", "Ø", "Ù", "Ú", "Û",
"Ü", "Ý", "Þ", "ß", "à", "á",
"â", "ã", "ä", "å", "æ", "ç",
"è", "é", "ê", "ë", "ì", "í",
"î", "ï", "ð", "ñ", "ò", "ó",
"ô", "õ", "ö", "÷", "ø", "ù",
"ú", "û", "ü", "ý", "þ", "ÿ");

  return str_replace($trans_tbl[$cs_from],  $trans_tbl[$cs_to], 
$string);
}

$string = recode_charset('ÄäÖöÜüß','ASCII','HTML');

will produce ÃãÛûÕõÞ

but ÄäÜüÖöß is correct.

------------------------------------------------------------------------

[2002-11-02 17:46:51] [EMAIL PROTECTED]

Sorry, but your problem does not imply a bug in PHP itself.  For a
list of more appropriate places to ask for help using PHP, please
visit http://www.php.net/support.php as this bug system is not the
appropriate forum for asking support questions. 

Thank you for your interest in PHP.



------------------------------------------------------------------------

[2002-11-02 17:43:08] panacode at skynet dot be

Sorry for bothering (and for my writing errors).

There actually is another function in PHP that has the
behaviour that I expect: strtr(str, arr)

$vReplace['@gill'] = '@doubleyou';
$vReplace['@doubleyou'] = '@bates';

$sSubject = "@gill @doubleyou is not my friend";
$sResult = strtr($sSubject, $vReplace);

echo $sResult; 
// will output "@doubleyou @bates is not my friend"

------------------------------------------------------------------------

[2002-11-02 14:22:23] [EMAIL PROTECTED]

Please try using this CVS snapshot:

  http://snaps.php.net/php4-latest.tar.gz
 
For Windows:
 
  http://snaps.php.net/win32/php4-win32-latest.zip



------------------------------------------------------------------------

[2002-11-02 13:04:24] panacode at skynet dot be

str_replace when used with with arrays,
for every element in the search/replace arrays
a simple replace in the source string (rather than
using an external string) is performed.

This causes an unexpected result like
if one of the replace values includes
a search value it will be replaced in a subsequent
replacing action.

If this is a feature rather than a bug (which I doubt)
please state it in the documentation.

An example:

$vSearch[] = '@gill';
$vSearch[] = '@doubleyou';

$vReplace[] = '@doubleyou';
$vReplace[] = '@bates';

$sSubject = "@gill is my friend";
$sResult = str_replace($vSearch, $vReplace, $sSubject);

echo $sResult; 
// will output "@bates is not my friend" instead
// of "@doubleyou is not my friend"



Best regards,
Eugen Fernea
IT Manager
Panacode Software
rue de la Station, 1/1
7090 Braine-Le-Comte
Belgium
E-mail: [EMAIL PROTECTED]
Phone: +32 067/48 58 94
Mobile: +32 (0)472 95 15 48
Web: http://www.panacode.com

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