How much have you done. Have you got any of this in place? You can search for the numbers and display the line easily enough with preg_match
PHP Code:
$numbers_to_search = '123400 0000001';
$file_to_search = 'path_to_file';
$numbers_to_search = str_replace(" ", "\s", $numbers_to_search);
$str=$file_get_contents($file_to_search);
if(preg_match_all("/(\r\n|\n|\r).*".$str.".*(\r\n|\n|\r|$)/u", $str, $matches))
{
print_r($matches);
}
Is it always going to be number though. or could it be any text to search. If it could be any text then using a regex might not be so useful. Maybe using the
file command would be better