Minimum Phone numbers digits Woocommerce Checkout

问题

I want the user to enter a minimum of 7 numbers for their phone number in the Woocommerce checkout. The function below works but it includes spaces, so if user enter 6 numbers with 1 space it counts it as 7. How Can I change the function so that it only counts numbers not spaces so that the user has to enter a minimum of 7 numbers.

// validation for Billing Phone checkout field
add_action('woocommerce_checkout_process', 'custom_validate_billing_phone');
function custom_validate_billing_phone() {
    $is_correct = preg_match('/^[0-9 \-]{7}/i', $_POST['billing_phone']);
    if ( $_POST['billing_phone'] && !$is_correct) {
        wc_add_notice( __( 'Phone Number must be <strong>minimum 7 numbers</strong>.' ), 'error' );
    }
}

回答1:

I figured out the solution.

$is_correct = preg_match('/^[0-9\D]{7}/i', $_POST['billing_phone']);

回答2:

You can use the following regex. It only Count the digits:

^(?:\D*?\d\D*?){7}$

It starts from start of string, then creates a non capturing Group, that matches optional any number of non digit, digit and optional any number of non digit. It will require exactly 7 of that.

This means, it only Counts the digits and ignore non digits in the Count.

Examples of match:

1234567
1 23 45 67
123-4567

Example of non-match:

123 456
12-34-56-78

回答3:

Change preg_match line with this line:

$is_correct = preg_match('/^[0-9\-]{7}/i', $_POST['billing_phone']);

That should work.

来源：https://stackoverflow.com/questions/53440386/minimum-phone-numbers-digits-woocommerce-checkout

标签

php

regex

wordpress

woocommerce

phone-number