How to generate a 9 digit number

Question

I am trying to use php to generate a 9 digit number that does not start with 0, and split the dash into every third number.

eg. 102-394-458

I also discuss

• to save it as a number or do formatting on the front side
• or save it as a number and do formatting on the backend
• or just save the dash in the database as well

Of course, the choice will affect how the number is generated.

Answer 1

implode('-',str_split(rand(100000000,999999999),3))

Generally, it’s better to just store as a number and format it just for display purposes

Answer 2

number_format() -. , "" , - , , .

:

$number = mt_rand(100000000,999999999);

number_format :

echo number_format($number,0,"","-");

Answer 3

1 9. 8 0 9. , , .

Answer 4

( , , .)

,

mt_rand(100000000, 999999999);

:

wordwrap($number, 3, '-', true);