PHP regular expression /only match 10 whole digits/;

Currently, I am working on updating a PHP script that contains the following code snippet:

function CheckNumber(MyNumber)
{
    var MN = /^\d{10}$/;
    if (MN.test(MyNumber)) {
        return true;
    }
    return false;
}

The current script enforces the entry of exactly 10 digits. No more, no less.

Now, I have a requirement to modify it with the following conditions: - Must not exceed 12 digits. - Should allow less than 12 digits as well. - Special characters are not allowed.

I am seeking assistance as I am unfamiliar with regular expression coding. Your help is greatly appreciated.

javascriptregex

Answer №1

The symbols { and } are used to indicate repetition. For example, {10} signifies exactly 10 repetitions. It is possible to set both a minimum and maximum limit for the number of repetitions.

For instance, to specify a range from 5 to 12 repetitions: {5,12}

To set no minimum but a maximum of 12 repetitions: {,12}

Conversely, you can also establish a minimum without a maximum limit.

For example, setting a minimum of 5 repetitions with no maximum: {5,}

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