remove all bad words from form

[alpesh]

Quote:

To remove all bad words from form
-------------

<?php
function Filter(&$text, $replace)
{
//fill this array with the bad words you want to filter and their replacements
$bads = array (
array("Fool","F**l"),
array("crap","c***")
);

if($replace==1)
{
//we are replacing
$remember = $text;

for($i=0;$i<sizeof($bads);$i++)
{
//go through each bad word
$text = eregi_replace($bads[$i][0],$bads[$i][1],$text); //replace it
}

if($remember!=$text) return 1; //if there are any changes, return 1

} else {

//we are just checking
for($i=0;$i<sizeof($bads);$i++)
{
//go through each bad word
if(eregi($bads[$i][0],$text)) return 1; //if we find any, return 1
}

}
}

?>


Example1.php

<?php

include('Filter.php');

// This will replace all bad words with their replacements.$any is 1 if it found any
$result = Filter($wordsToFilter,1);

//this will not repace any bad words but instead will only search for them. $any is 1 if it found any
$result = Filter($wordsToFilter,0);

?>

[Tony]

Is "pointer" a bad word?

alpesh @ Thu Nov 01, 2007 2:07 am wrote:

function Filter(&$text, $replace)
...
$remember = $text;
...
if($remember!=$text) return 1; //if there are any changes, return 1

$remember == $text, so it will never != $text unless, of course, you change $remember. You're not doing that.

[Mazer]

For fuck's sake, why couldn't you use some goddamn code tags, you jackass.

EDIT: Tony, he's not changing $remember, but it looks like he is changing $text.

[Zampano]

I really want tho see this happen: You are all crap fools, the whole bunch of ya!

[Tony]

Mazer @ Thu Nov 01, 2007 8:09 am wrote:

EDIT: Tony, he's not changing $remember, but it looks like he is changing $text.

$remember is a pointer, same as $text. While the contents of what one of them points to changes, both variables still point to the same thing, and thus will always equal each other.

code:

function Baz(&$foo){    $bar = $foo;    echo $bar == $foo; // it's 1    $foo = "something totally different";    echo $bar == $foo; // it's still 1 } $text = "some text"; Baz($text);

[octopi]

$remember isn't a pointer, if it was a pointer(reference) then the line would be

code:

$remember =& $text;

$remember is simply assigned the value of $text (which is really the value of $wordsToFilter) and it's address is NOT mapped to the same address as $text;

to clarify, $remember grabs the string value out of memory which is referenced by $text, and stores a copy of it in a different location, which is then referenced by $remember.

code:

$foo = "hello"; $text = "some text"; $remember = $text; $remember = "not some text anymore"; //$text will still be "some text" $remember =& $foo; $remember = "goodbye"; echo $foo;  //would output goodbye

It doesn't matter that the original text is a reference to another variable/memory location, because we haven't told $remember to take on the reference, we've just told it to take on the value (php works differently than other languages)

[Tony]

octopi @ Thu Nov 01, 2007 12:13 pm wrote:

php works differently than other languages

heh. apparently.

I stand corrected. I should stop pretending that I understand PHP.

[Mazer]

Tony @ Thu Nov 01, 2007 3:25 pm wrote:

I should stop pretending that I understand PHP.

Me, too, but not until I'm actually found out

[NickPresta]

I wrote a PHP word filter a few months ago and it seems to get the job done.

It is fairly simple right now, it replaces the "banned" word(s) with asterisks and has strict or loose filtering.

http://nickpresta.ath.cx/h4x/wordfilter/index.php