regex, preg_replace: replacing multiple instances with single

Question

I have auto generated string.

One of its elements is a group "/__nh".

Sometimes it is being multiplied, e.g.:

$string = some_stuff_here/__nh/__nh/__nh

I tried code below (and some other variation as well) to replace replace multiple instances with a single one:

return preg_replace('/(//__nh)+/', '/__nh', $string);

.. but I failed (regex is not something I'm comfortable with).

user142162 · Accepted Answer · 2012-07-24 16:46:48Z

2

You should escape your forward slash using a backslash, not another forward slash:

return preg_replace('/(\/__nh)+/', '/__nh', $string);

answered Jul 24, 2012 at 16:46

user142162

Sign up to request clarification or add additional context in comments.

1 Comment

I see, wrong escape used by me - probably this heat wave we have in UK at present could be blamed :) thank you

DanielX2010 · Accepted Answer · 2012-07-24 16:49:33Z

0

Why do you have a double slash on your regex?

Shouldn't it be a back slash ?

answered Jul 24, 2012 at 16:49

DanielX2010

1,9081 gold badge24 silver badges27 bronze badges