PHP preg replace only allow numbers

Question

How can I modify this existing preg_replace to only allow numbers?

function __cleanData($c) 
{
    return preg_replace("/[^A-Za-z0-9]/", "",$c);
}

score 214 · Accepted Answer · answered Oct 07 '11 at 14:44

214

I think you're saying you want to remove all non-numeric characters. If so, \D means "anything that isn't a digit":

preg_replace('/\D/', '', $c)

answered Oct 07 '11 at 14:44

lonesomeday

score 43 · Answer 2 · answered Oct 07 '11 at 14:45

43

Try this:

return preg_replace("/[^0-9]/", "",$c);

answered Oct 07 '11 at 14:45

qbert220

1

In case you want to keep the dot for decimal numbers, it would be like this: ```return preg_replace("/[^0-9.]/", "", $c);``` – Pierre Jul 24 '22 at 05:41

score 22 · Answer 3 · edited Nov 17 '12 at 23:59

22

This should do what you want:

preg_replace("/[^0-9]/", "",$c);

edited Nov 17 '12 at 23:59

random_user_name

answered Oct 07 '11 at 14:45

oezi

score 1 · Answer 4 · answered Nov 18 '22 at 01:57

1

In my case, I want to keep number and '.' only

return preg_replace("/[^0-9.]/", "",$c);

answered Nov 18 '22 at 01:57

4 Answers4