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Last updated: Fri, 18 May 2012

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stripslashes

(PHP 4, PHP 5)

stripslashes — Entfernt aus einem gequoteten String alle Quotes

Beschreibung

string stripslashes ( string $str )

Entfernt aus einem gequoteten String alle Quotes.

Hinweis:

Wenn magic_quotes_sybase eingeschaltet ist, werden keine einfachen Backslashes entfernt, doppelte jedoch durch einfache Backslashes ersetzt.

Eine exemplarische Anwendung für stripslashes() ergibt sich, wenn die PHP-Direktive magic_quotes_gpc auf On gesetzt ist (Default-Einstellung), und Sie die übermittelten Daten an anderer Stelle, die eigenes Escaping erfordert (wie z.B. eine Datenbank), einfügen wollen. Zum Beispiel, wenn Sie Daten direkt aus einem HTML-Formular verarbeiten wollen.

Parameter-Liste

str

Die Eingabezeichenkette.

Rückgabewerte

Gibt einen String zurück, aus dem alle Backslashes ("\") entfernt wurden. (\' wird zu ' usw.). Doppelte Rückstriche (\\) werden zu einem einfachen Backslash (\) umgesetzt.

Beispiele

Beispiel #1 Ein stripslashes()-Beispiel

<?php
$str = "Ist Ihr Name O\'reilly?";

// Ausgabe: Ist Ihr Name O'reilly?
echo stripslashes($str);
?>

Hinweis:

stripslashes() ist nicht rekursiv. Wenn Sie die Funktion auf ein mehrdimensionales Array anwenden wollen, müssen Sie eine rekursive Funktion verwenden.

Beispiel #2 Verwendung von stripslashes() in einem Array

<?php
function stripslashes_deep($value)
{
    $value = is_array($value) ?
                array_map('stripslashes_deep', $value) :
                stripslashes($value);

    return $value;
}

// Beispiel
$array = array("f\\'oo", "b\\'ar", array("fo\\'o", "b\\'ar"));
$array = stripslashes_deep($array);

// Ausgabe
print_r($array);
?>

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

Array
(
    [0] => f'oo
    [1] => b'ar
    [2] => Array
        (
            [0] => fo'o
            [1] => b'ar
        )

)

Siehe auch



add a note add a note User Contributed Notes
stripslashes
lukas.skowronski at gmail dot com
20-Jun-2007 01:15
If You want to delete all slashes from any table try to use my function:

function no_slashes($array)
    {
        foreach($array as $key=>$value)
            {
                if(is_array($value))
                    {
                        $value=no_slashes($value);
                        $array_temp[$key]=$value;                       
                    }
                else
                    {
                        $array_temp[$key]=stripslashes($value);
                    }
            }       
        return $array_temp;   
    }
dragonfly at networkinsight dot net
12-Mar-2007 12:22
If you are having trouble with stripslashes() corrupting binary data, try using urlencode() and urldecode() instead.
JAB Creations
06-Mar-2007 05:49
When writing to a flatfile such as an HTML page you'll notice slashes being inserted. When you write to that page it's interesting how to apply stripslashes...

I replaced this line...
<?php fwrite($file, $_POST['textarea']); ?>

With...
<?php if (get_magic_quotes_gpc()) {fwrite ($file, stripslashes($_POST['textarea']));}?>

You have to directly apply stripslashes to $_POST, $_GET, $_REQUEST, and $_COOKIE.
gregory at nutt dot ca
22-Feb-2007 03:48
Here is code I use to clean the results from a MySQL query using the stripslashes function.

I do it by passing the sql result and the sql columns to the function strip_slashes_mysql_results.  This way, my data is already clean by the time I want to use it.

    function db_query($querystring, $array, $columns)
    {
      if (!$this->connect_to_mysql())
       return 0;

     $queryresult = mysql_query($querystring, $this->link)
        or die("Invalid query: " . mysql_error());
   
      if(mysql_num_rows($queryresult))
      {
          $columns = mysql_field_names ($queryresult);
   
          if($array)
          {
              while($row = mysql_fetch_row($queryresult))
                $row_meta[] = $this->strip_slashes_mysql_results($row, $columns);
              return $row_meta;
          }
          else
          {
              while($row = mysql_fetch_object($queryresult))
                $row_meta[] = $this->strip_slashes_mysql_results($row, $columns);
              return $row_meta;
          }
      }
      else
        return 0;
    }
   
    function strip_slashes_mysql_results($result, $columns)
    {
        foreach($columns as $column)
        {
              if($this->debug)
                  printp(sprintf("strip_slashes_mysql_results: %s",strip_slashes_mysql_results));
              $result->$column = stripslashes($result->$column);
        }
        return $result;
    }
Allen
07-Feb-2007 08:41
In response to Tim's solution, it is only good for one-dimensional array.  If the variables happened to be multi-dimensional arrays, we still have to use function like 'stripslashes_deep'.
stoic
02-Jan-2007 05:31
in response to crab dot crab at gmail dot com:

$value need not be passed by reference. The 'stripped' value is returned. The passed value is not altered.
Kibby
14-May-2006 10:41
Okay, if using stripslashes_deep, it will definitely replace any NULL to "".  This will affect to coding that depends isset().  Please provide a workaround based on recent note.
hauser dot j at gmail dot com
21-Feb-2006 11:13
Don't use stripslashes if you depend on the values NULL.

Apparently stripslashes converts NULL to string(0) ""

<?php
$a = null;
var_dump($a);

$b = stripslashes($a);
var_dump($b);
?>
Will output

NULL
string(0) ""
alf at mitose dot net
26-Oct-2005 02:09
Take care using stripslashes() if the text you want to insert in the database contain \n characters ! You'll see "n" instead of (not seeing) "\n".

It should be no problem for XML, but is still boring ...
r_loebs at hotmail dot com
25-Jun-2005 04:03
Of course why not just do an

if($r){ stuff; } <-- this will check it all, NULL, 0, ""
10-Feb-2005 04:45
If you want to deal with slashes in double-byte encodings, such as shift_jis or big5, you may use this:

<?
function stripslashes2($string) {
    $string = str_replace("\\\"", "\"", $string);
    $string = str_replace("\\'", "'", $string);
    $string = str_replace("\\\\", "\\", $string);
    return $string;
}
?>
mattyblah at gmail dot com
10-Sep-2004 05:51
It should be of note that if you are stripping slashes to get rid of the slashes added by magic_quotes_gpc then it will also remove slashes from \. This may not seem that bad but if you have someone enter text such as 'testing\' with a slash at the end, this will cause an error if not corrected. It's best to strip the slashes, then add a slash to every single slash using $text = str_replace('\\', '\\\\', $text);
hash at samurai dot fm
01-Dec-2003 06:34
Might I warn readers that they should be vary careful with the use of stripslashes on Japanese text. The shift_jis character set includes a number of two-byte code charcters that contain the hex-value 0x5c (backslash) which will get stripped by this function thus garbling those characters.

What a nightmare!
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stristr> <stripos
Last updated: Fri, 18 May 2012