array walk?

this code doesn't work on my PHP Version 5.2.1 (i'm trying to protect a
stie from XSS)

$a=Array();
$a[]='como';
$a[]=Array('hola','hello');
array_walk_recursive($a,'strip_tags');
echo "

";

var_dump($a);

echo "

array(2) {

 [0]=>

 string(11) "como"

 [1]=>

 &array(2) {

   [0]=>

   string(11) "hola"

   [1]=>

   string(5) "hello"

 }

}

Re: array walk?

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Looks like the answer is in the manual entry for array_walk_recursive

http://php.net/array_walk_recursive

*Note: * If *funcname* needs to be working with the actual values of the
array, specify the first parameter of *funcname* as a
reference.
Then, any changes made to those elements will be made in the original array
itself.

Try using a wrapper around strip_tags which tags a reference as its first
argument
function array_walk_strip_tags(&$string){
$string = strip_tags($string);
}

PHP is essentially only passing a copy of $a[i] and stripping the tags from
the copy without changing the actual values of $a. Passing by reference
ensures that you modify the entries in $a itself. How this is handled below
the hood is slightly more complex and I don't have a ton of experience with
how PHP specifically handles that sort of thing, but it looks like that will
at least point you in the right direction.

-Michael



On 6/28/07, Juan Ignacio Borda wrote:
>
> this code doesn't work on my PHP Version 5.2.1 (i'm trying to protect a
> stie from XSS)
>
> > $a=Array();
> $a[]='como';
> $a[]=Array('hola','hello');
> array_walk_recursive($a,'strip_tags');
> echo "

";

> var_dump($a);

> echo "

array(2) {

> [0]=>

> string(11) "como"

> [1]=>

> &array(2) {

>    [0]=>

>    string(11) "hola"

>    [1]=>

>    string(5) "hello"

> }

> }

> 

Re: array walk?

Take a look at array_walk()
http://be2.php.net/manual/en/function.array-map.php

It might be better for what you're doing.

Juan Ignacio Borda wrote:
> this code doesn't work on my PHP Version 5.2.1 (i'm trying to protect a
> stie from XSS)
>
> > $a=Array();
> $a[]='como';
> $a[]=Array('hola','hello');
> array_walk_recursive($a,'strip_tags');
> echo "

";

> var_dump($a);

> echo "

array(2) {

> [0]=>

> string(11) "como"

> [1]=>

> &array(2) {

>   [0]=>

>   string(11) "hola"

>   [1]=>

>   string(5) "hello"

> }

> }

>