php string function help

[will35010]

I need to know which function I can use to add character to a string. I want to do the opposite of what explode does.

 

example: 123456789

 

I want it to do this: 123-45-6789

 

Thanks.

[Buddski]

You can use join with substr calls..

$str = '123456789';
$array = array(substr($str,0,3),substr($str,3,2),substr($str,5));
echo join('-',$array);

[will35010]

You can use join with substr calls..

$str = '123456789';
$array = array(substr($str,0,3),substr($str,3,2),substr($str,5));
echo join('-',$array);

 

Thank you!