php - I need to validating a 9 similar-digit numbers -

how can create pattern verify number doesn't happen in text input in php

 000000000 111111111 222222222 333333333 444444444 555555555 666666666 777777777 888888888 999999999 

it's like:

if(preg_match('/\d{9,}/', $input)){ // 9 or more digits   echo 'problem'; } else{   echo 'no problem'; }