PHP - String replacement

[Northern Monkey]

I have the following code:

echo $ref_url.'<br>';
echo $keywords[1];

if (isset($keywords[1]) and ($keywords[1]!="") and ($keywords[1]!=" "))
{
$keywords1=preg_replace("/+/"," ",$keywords[1]);
}

echo $keywords;

Which produces the following:

http://localhost/hvi/viewvilla.php?h...lla+rome&meta=
holiday+villa+rome
Warning: preg_replace(): Delimiter must not be alphanumeric or backslash in c:\program files\apache group\apache\htdocs\hvi\logger.inc on line 91

After - holiday+villa+rome

Any idea why my +'s aren't changing to spaces??

NM.

[limboInternet]

try changing the plusses to %20 thats code for space in url strings

[Rich]

A + is a special character in regular expressions. You should escape it with a \, like: -
$keywords1=preg_replace("/\+/"," ",$keywords[1]);

or, more efficiently, avoid the regular expression and use str_replace: -
$keywords1=preg_replace('+',' ',$keywords[1]);

or, assuming you might end up with other encoded characters in your query, you could use: -
$keywords1=urldecode($keywords[1]);

By the way, it's also more efficient to use single quotes rather than double quotes if you don't need to substitute variables inside the string, though it is minute differences.

[Northern Monkey]

Thanks for all the comments, worked a treat!

NM.

P.S. I also use single quote normally where possible but they always creep in places