Preg_match不匹配

Question

I'm trying to validate a Spanish phone number. I have a regular expression declared:

$telefono_regex = '/^(6|7|8|9)[0-9]{8}$/';

And I check the number:

if (!preg_match($telefono_regex, $telefono)){
     array_push($errores, 'telefono');
}

Why does this always return false? I have checked in https://regex101.com/ and found match with the same numbers.

Answer 1

The regex in your question and in your first try on regex101.com were different.

Assuming you want to check numbers with optional dash or space every three digits(as in your first try on regex101.com), you can try this:

$telefono_regex = '/^[6-9]{3}(?:[ -]?[0-9]{3}){2}$/';

• ^[6-9]{3}: three digits from 6 to 9
• (?:[ -]?[0-9]{3}): non-capturing group to match zero or one space or dash ([ -]?) followed by three numbers ([0-9]{3})
• {2}: to match 2 occurrences of the non-capturing group

You can check it here.