How to match two digits in pregmatch?

Question

I have return a preg_match to check whether starting digits were 9477 or not and it works correctly. But now I want add another condition to add 9477 or 9476 should be valid.

Here is the condition:

1. should contain 11 digits
2. should starts with 9477 or 9476

Here is my code:

preg_match('/^9477\d{7}$/',$Mnumber)

Answer 1

Use an alternation between the two numbers:

preg_match('/^947(?:7|6)\d{7}$/',$Mnumber)

(?:7|6) is a non capture group that matches digit 7 or 6. A non capture group is much more efficient than a capture group.

You can do also:

preg_match('/^947[76]\d{7}$/',$Mnumber);

[67] is a character class that matches digit 7 or 6

Answer 2

Use grouping in []

echo preg_match('/^947[76]\d{7}$/',$Mnumber);

Answer 3

Just use (9477|9476)

echo preg_match('/^(9477|9476)\d{7}$/',$Mnumber);

You can also use:

1. /^947(7|6)\d{7}$/
2. /^947[76]\d{7}$/