Development php expression problems

trying to get this working;

Code:

<?php
$old = "[45/43]"; 
$new = preg_replace('\[[0-9][0-9]\/[0-9][0-9]\]', 'removed', $old); 
echo "result $new";
 ?>

but all its showing is "result"

I need it to get rid of text that is being outputted as [number/number] sometimes the nubmer is double figure sometimes its single

any help would be appreciated

 

So, you're trying to remove the whole thing "[XX/XX]", right?

PHP:

echo preg_replace('/[[0-9]+\/[0-9]+]/', 'removed', $old);
// echos "result removed"

 

thanks hwulex working perfectly