Check for digits with dashes using regex

Question

If I need a string to match this pattern: " *- -***","123-12-123","123-1", how would I check the string to make sure it fits that, in PHP?

I want to make sure the string fits any of these patterns:

"***-**-***"
"123-12-123" (ONLY NUMERIC WITH -)
"123-1" (ONLY NUMERIC WITH -)

Answer 1

You can use the regex

/\d{3}\-\d(\d\-\d{3}|)/

If you need to match only that string, put ^ after the first / and $ before the last /

Keep in mind this will match anything that starts ddd-d as-is

You can see it work here https://3v4l.org/JI5GT

Answer 2

u can find all numbers without regex for example

$numbers=sscanf('123-12-123','%d-%d-%d');

print_r($numbers);

output

Array
(
    [0] => 123
    [1] => 12
    [2] => 123
)

if you want get it with regex you can do with follow code

$re = '/\d{3}-\d{2}-\d{3}/m';
$str = '123-12-123';

preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);

// Print the entire match result
var_dump($matches);