用于特定电话号码格式的PHP正则表达式

Question

im trying to validate phone number in php. The requirements are (0d)dddddddd or 0d dddddddd where d is 0-9. This is what I have right now

if(!preg_match("/^0[0-9]{9}$/", $phone))
{
//wrong format
}

I have tried several similar questions, but still cant understand regex very well. Can anyone help me fix the regex?

Answer 1

You could try the below code,

if(!preg_match("~^(?:0\d\s|\(0\d\))\d{8}$~", $phone))
{
//wrong format
}

DEMO

Explanation:

^                        the beginning of the string
(?:                      group, but do not capture:
  0                        '0'
  \d                       digits (0-9)
  \s                       whitespace 
 |                        OR
  \(                       '('
  0                        '0'
  \d                       digits (0-9)
  \)                       ')'
)                        end of grouping
\d{8}                    digits (0-9) (8 times)
$                        before an optional 
, and the end of the
                         string