Validate phone number in woocommerce checkout page

Question

I would like to add custom validation to the phone number in checkout page of woocommerce. How do I do this??

Answer 1

BY default woocommerce already have regular expression validation. The easiest way would be to validate it through jquery.

EDIT: Try not to make any changes to the woocommerce core as they will be over ridden on next update. Try this code

// Hook in
add_filter( 'woocommerce_checkout_fields' , 'custom_override_checkout_fields' );

// Our hooked in function - $fields is passed via the filter!
function custom_override_checkout_fields( $fields ) {
     $fields['shipping']['shipping_phone'] = array(
        'label'     => __('Phone', 'woocommerce'),
    'placeholder'   => _x('Phone', 'placeholder', 'woocommerce'),
    'required'  => true,
    'class'     => array('form-row-wide'),
    'clear'     => true
     );

     return $fields;
}