PHP: stripslashes - Manual (original) (raw)

(PHP 4, PHP 5, PHP 7, PHP 8)

stripslashes — Un-quotes a quoted string

Description

stripslashes() can be used if you aren't inserting this data into a place (such as a database) that requires escaping. For example, if you're simply outputting data straight from an HTML form.

Parameters

string

The input string.

Return Values

Returns a string with backslashes stripped off. (\' becomes ' and so on.) Double backslashes (\\) are made into a single backslash (\).

Examples

Example #1 A stripslashes() example

<?php $str = "Is your name O\'reilly?";// Outputs: Is your name O'reilly? echo stripslashes($str); ?>

Note:

stripslashes() is not recursive. If you want to apply this function to a multi-dimensional array, you need to use a recursive function.

Example #2 Using stripslashes() on an array

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

return

$value;
}// Example
$array = array("f\'oo", "b\'ar", array("fo\'o", "b\'ar")); array=stripslashesdeep(array = stripslashes_deep(array=stripslashesdeep(array);// Output
print_r($array);
?>`

The above example will output:

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

)

Found A Problem?

ivijan dot stefan at gmail dot com ¶

11 years ago

Sometimes for some reason is happens that PHP or Javascript or some naughty insert a lot of  backslash. Ordinary function does not notice that. Therefore, it is necessary that the bit "inflate":

<?php
function removeslashes($string)
{
    <span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>s</mi><mi>t</mi><mi>r</mi><mi>i</mi><mi>n</mi><mi>g</mi><mo>=</mo><mi>i</mi><mi>m</mi><mi>p</mi><mi>l</mi><mi>o</mi><mi>d</mi><mi>e</mi><mo stretchy="false">(</mo><mi mathvariant="normal">&quot;</mi><mi mathvariant="normal">&quot;</mi><mo separator="true">,</mo><mi>e</mi><mi>x</mi><mi>p</mi><mi>l</mi><mi>o</mi><mi>d</mi><mi>e</mi><mo stretchy="false">(</mo><mi mathvariant="normal">&quot;</mi><mspace linebreak="newline"></mspace><mi mathvariant="normal">&quot;</mi><mo separator="true">,</mo></mrow><annotation encoding="application/x-tex">string=implode(&quot;&quot;,explode(&quot;\\&quot;,</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.854em;vertical-align:-0.1944em;"></span><span class="mord mathnormal">s</span><span class="mord mathnormal">t</span><span class="mord mathnormal" style="margin-right:0.02778em;">r</span><span class="mord mathnormal">in</span><span class="mord mathnormal" style="margin-right:0.03588em;">g</span><span class="mspace" style="margin-right:0.2778em;"></span><span class="mrel">=</span><span class="mspace" style="margin-right:0.2778em;"></span></span><span class="base"><span class="strut" style="height:1em;vertical-align:-0.25em;"></span><span class="mord mathnormal">im</span><span class="mord mathnormal" style="margin-right:0.01968em;">pl</span><span class="mord mathnormal">o</span><span class="mord mathnormal">d</span><span class="mord mathnormal">e</span><span class="mopen">(</span><span class="mord">&quot;&quot;</span><span class="mpunct">,</span><span class="mspace" style="margin-right:0.1667em;"></span><span class="mord mathnormal">e</span><span class="mord mathnormal">x</span><span class="mord mathnormal" style="margin-right:0.01968em;">pl</span><span class="mord mathnormal">o</span><span class="mord mathnormal">d</span><span class="mord mathnormal">e</span><span class="mopen">(</span><span class="mord">&quot;</span></span><span class="mspace newline"></span><span class="base"><span class="strut" style="height:0.8889em;vertical-align:-0.1944em;"></span><span class="mord">&quot;</span><span class="mpunct">,</span></span></span></span>string));
    return stripslashes(trim($string));
}

/* Example */

$text="My dog don\\\\\\\\\\\\\\\\'t like the postman!";
echo removeslashes($text);
?>

RESULT: My dog don't like the postman!

This flick has served me wery well, because I had this problem before.

shredder at technodrome dot com ¶

16 years ago

Hi, 

Here are recursive addslashes / stripslashes functions.
given a string - it will simply add / strip slashes
given an array - it will recursively add / strip slashes from the array and all of it subarrays. 
if the value is not a string or array - it will remain unmodified!

<?php

function add_slashes_recursive( $variable )
{
    if ( is_string( $variable ) )
        return addslashes( $variable ) ;

    elseif ( is_array( $variable ) )
        foreach( <span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>v</mi><mi>a</mi><mi>r</mi><mi>i</mi><mi>a</mi><mi>b</mi><mi>l</mi><mi>e</mi><mi>a</mi><mi>s</mi></mrow><annotation encoding="application/x-tex">variable as </annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.6944em;"></span><span class="mord mathnormal" style="margin-right:0.03588em;">v</span><span class="mord mathnormal">a</span><span class="mord mathnormal" style="margin-right:0.02778em;">r</span><span class="mord mathnormal">iab</span><span class="mord mathnormal" style="margin-right:0.01968em;">l</span><span class="mord mathnormal">e</span><span class="mord mathnormal">a</span><span class="mord mathnormal">s</span></span></span></span>i => $value )
            <span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>v</mi><mi>a</mi><mi>r</mi><mi>i</mi><mi>a</mi><mi>b</mi><mi>l</mi><mi>e</mi><mo stretchy="false">[</mo></mrow><annotation encoding="application/x-tex">variable[ </annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:1em;vertical-align:-0.25em;"></span><span class="mord mathnormal" style="margin-right:0.03588em;">v</span><span class="mord mathnormal">a</span><span class="mord mathnormal" style="margin-right:0.02778em;">r</span><span class="mord mathnormal">iab</span><span class="mord mathnormal" style="margin-right:0.01968em;">l</span><span class="mord mathnormal">e</span><span class="mopen">[</span></span></span></span>i ] = add_slashes_recursive( $value ) ;

    return $variable ;
}

function strip_slashes_recursive( $variable )
{
    if ( is_string( $variable ) )
        return stripslashes( $variable ) ;
    if ( is_array( $variable ) )
        foreach( <span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>v</mi><mi>a</mi><mi>r</mi><mi>i</mi><mi>a</mi><mi>b</mi><mi>l</mi><mi>e</mi><mi>a</mi><mi>s</mi></mrow><annotation encoding="application/x-tex">variable as </annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.6944em;"></span><span class="mord mathnormal" style="margin-right:0.03588em;">v</span><span class="mord mathnormal">a</span><span class="mord mathnormal" style="margin-right:0.02778em;">r</span><span class="mord mathnormal">iab</span><span class="mord mathnormal" style="margin-right:0.01968em;">l</span><span class="mord mathnormal">e</span><span class="mord mathnormal">a</span><span class="mord mathnormal">s</span></span></span></span>i => $value )
            <span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>v</mi><mi>a</mi><mi>r</mi><mi>i</mi><mi>a</mi><mi>b</mi><mi>l</mi><mi>e</mi><mo stretchy="false">[</mo></mrow><annotation encoding="application/x-tex">variable[ </annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:1em;vertical-align:-0.25em;"></span><span class="mord mathnormal" style="margin-right:0.03588em;">v</span><span class="mord mathnormal">a</span><span class="mord mathnormal" style="margin-right:0.02778em;">r</span><span class="mord mathnormal">iab</span><span class="mord mathnormal" style="margin-right:0.01968em;">l</span><span class="mord mathnormal">e</span><span class="mopen">[</span></span></span></span>i ] = strip_slashes_recursive( $value ) ;
    
    return $variable ; 
}

?>

Tom Worster ¶

16 years ago

A replacement that should be safe on utf-8 strings.
<?php
  preg_replace(array('/\x5C(?!\x5C)/u', '/\x5C\x5C/u'), array('','\\'), $s);
?>

o-zone at zerozone dot it ¶

16 years ago

If you need to remove all slashes from a string, here's a quick hack:

<?php
function stripallslashes($string) {
    while(strchr($string,'\\')) {
        <span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>s</mi><mi>t</mi><mi>r</mi><mi>i</mi><mi>n</mi><mi>g</mi><mo>=</mo><mi>s</mi><mi>t</mi><mi>r</mi><mi>i</mi><mi>p</mi><mi>s</mi><mi>l</mi><mi>a</mi><mi>s</mi><mi>h</mi><mi>e</mi><mi>s</mi><mo stretchy="false">(</mo></mrow><annotation encoding="application/x-tex">string = stripslashes(</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.854em;vertical-align:-0.1944em;"></span><span class="mord mathnormal">s</span><span class="mord mathnormal">t</span><span class="mord mathnormal" style="margin-right:0.02778em;">r</span><span class="mord mathnormal">in</span><span class="mord mathnormal" style="margin-right:0.03588em;">g</span><span class="mspace" style="margin-right:0.2778em;"></span><span class="mrel">=</span><span class="mspace" style="margin-right:0.2778em;"></span></span><span class="base"><span class="strut" style="height:1em;vertical-align:-0.25em;"></span><span class="mord mathnormal">s</span><span class="mord mathnormal">t</span><span class="mord mathnormal" style="margin-right:0.02778em;">r</span><span class="mord mathnormal">i</span><span class="mord mathnormal">p</span><span class="mord mathnormal">s</span><span class="mord mathnormal" style="margin-right:0.01968em;">l</span><span class="mord mathnormal">a</span><span class="mord mathnormal">s</span><span class="mord mathnormal">h</span><span class="mord mathnormal">es</span><span class="mopen">(</span></span></span></span>string);
    }
}
?>

Hope it's usefull , O-Zone

stoic ¶

18 years ago

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.

hash at samurai dot fm ¶

22 years ago

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!

PHP: stripslashes - Manual (original) (raw)

Description

Parameters

Return Values

Examples

See Also

Found A Problem?