whitespace

alexgeek · #1 Sep 22nd, 2007, 08:46

what was that function to take whitespace out of a string? cheers

Sagaris · #2 Sep 22nd, 2007, 10:02

You can use trim to get rid of whitespace at the begining and end of a string


$nospaces = trim($string);

Or use str_replace to remove whitespace throughout a string

PHP: Select all


$nospaces = str_replace(' ', '', $string);

HTH

c010depunkk · #3 Sep 22nd, 2007, 10:54

Or preg_replace:

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$result=preg_replace('/[^ ]/','','input text');

alexgeek · #4 Sep 22nd, 2007, 12:18

just what I needed thanks

alexgeek · #5 Sep 23rd, 2007, 17:33

how would i do the following:
$string = str_replace('<script HERE >', '<b>BLOCKED CODE</B>', $string);

how can i change HERE to a wildcard,

so the following would be replaced:
<script>
<script src="mal.js">
<script type="text/javascript">

thanks

c010depunkk · #6 Sep 23rd, 2007, 18:04

Haven't tested this but it should work:

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$string = preg_replace('/<script [.]*>/', '<b>BLOCKED CODE</B>', $string);

alexgeek · #7 Sep 23rd, 2007, 18:19

it didn't work

grahame · #8 Sep 23rd, 2007, 19:25

use .*? rather that [.]* ... and take out the leading space ahead of the [.] too if you want it to work on <script> alone.

The match you have in the example in previous posts is a greedy one that will match up to the last >; you want a sparse match to only go as far as the next >.

alexgeek · #9 Sep 23rd, 2007, 19:43

okay this is my function for anyone who wanted to know

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 $string = preg_replace('/<script .*?>/', '<strong>BLOCKED CODE</strong>', $string); 
    $string = preg_replace('/<script>/', '<strong>BLOCKED CODE</strong>', $string); 
    $string = preg_replace('/<script/', '<strong>BLOCKED CODE</strong>', $string);

now the next problem is the php remover:

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             $string = addslashes($string);
            $string = str_replace('<?', '<b>BLOCKED CODE</B>', $string);
            $string = str_replace('?>', '<b>BLOCKED CODE</B>', $string);

it works fine but if the string to be filtered was:

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 $string = "<?php echo $dbpass ?>";

it would still echo the password, if this was called after the filter:

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 echo $string.

so how can i change any variable ($test1, $_test etc)
to

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"<b>BLOCKED CODE</B>"

sorry if that isn't clear :/

c010depunkk · #10 Sep 23rd, 2007, 20:01

Here's a regex to check if a string is a valid PHP variable. See if you can modify this to work:

PHP: Select all


 preg_match('/^\$[A-Z_][A-Z0-9_]*$/i',$t)

lol, I think you should teach yourself a bit about regular expressions. The basics are easy to learn and you can do some really cool stuff with them.

Start here: http://www.regularexpressions.info

alexgeek · #11 Sep 23rd, 2007, 20:02

thanks i googled about and i didn't find much
+ rep for both

c010depunkk · #12 Sep 23rd, 2007, 20:02

edited my post above.

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whitespace