preg_replace issue

[GD77]

Hello:

I'm using the following to format a number:

$ne=1113444555

$v1=substr($ne, 0,3)."-".substr($ne, 3,1)."-".substr($ne, 4,3)."-".substr($ne, 7);

result: 111-3-444-555

 

Trying with preg_replace... not working well since I can find the match but not successful in converting it:

$v1=preg_replace('/(([(\d]{3}){1}([(\d)]{1}){1}([(\d)]{3}){2})/', '$1-$2-$3-$4', $ne);

[GD77]

fixed with:

'~([(\d]{3}){1}([(\d)]{1}){1}([(\d)]{3}){1}([(\d)]{3}){1}$~', '$1-$2-$3-$4',....

but I m using ([(\d)]{3}){1} twice should not that be replaced with ([(\d)]{3}){2}? :/

anyway here how I ve fixed it http://www.functions-online.com/preg_replace.html online test

 

still don t egt it why ~ delimiter is obligatory in it :/