how to write a php regex for a string that start with one character followed by 6 numbers

Question

I would like to write a regex to match a string starts with one character followed by 6 numbers. below is what i write:

$pattern  = '/^[a-z][0-9]{6}$/'

I am not sure if it is correct. If it is not correct, how to write the regex?

Answer 1

也就是说，它以一个小写字母开头，如果您也想覆盖大写字母，则：

$pattern  = '/^[a-zA-Z][0-9]{6}$/'