Regular Expressions

I am using this code:

$menu_css = ereg_replace("[^A-Za-z0-9]", "", $menu_css );

Code (markup):

However, the code is removing spaces.

How can I change it so that it removes everything, except spaces?

 

if you remove everything except spaces then you end up with a string containing only spaces!

What is the point of that?

Maybe you should explain more what you want to do.

 

The code above only removed everything that is not a number or letter.

However, it is also removing spaces. I do not want it to remove spaces.

I don't want it to remove underscores either.

Or, in other words, I want to remove everything except numbers, letters, spaces and underscores from $my_value.

 

Try this.

		
$string = 'Some 1234 very big string _ with - space .';
$allowed = "/[^a-z0-9\\ \\_\\\\]/i";
$result_string = preg_replace($allowed,"",$string);

Code (markup):

 

"/[a-z0-9\s\_]/i"
Cleaner looking.

 

use \s. it means space in regex