preg_replace all spaces

Question

I\'m trying to replace all spaces with underscores and the following is not working:

$id = \"aa aa\";
echo $id;
preg_replace(\'/\\s+/\', \'_\', $id);
echo $i         


        

Answer 1

Sometimes, in linux/unix environment,

$strippedId = preg_replace('/\h/u', '',  $id);

Try this as well.