WordPress phone Number Restrict to allow xxx-xxx-xxxx Format

Question

I have Kept the placeholder as xxx-xxx-xxxx

<label> Phone Number </label> [number* shm-mrk-phone minlength:10 maxlength:140 placeholder "]

I changes the tel script in plugin formatting.php

function wpcf7_is_tel( $tel ) {
    $result = preg_match( '/^(?:\(\d{3}\)|\d{3}-)\d{3}-\d{4}$/', $tel );
    return apply_filters( 'wpcf7_is_tel', $result, $tel );
}

its not allowing xxx-xxx-xxxx( this should allow), its allowing xxxxxxxxxx

Answer 1

It's Very Simple. i used tel instead of number Type to add Mobile Number.

In Contact Form 7 plugin formatting.php Module,

i updated the Code of wpcf7_is_tel function with.

function wpcf7_is_tel( $tel ) {
    $result = preg_match( '/^(?:\(\d{3}\)|\d{3}-)\d{3}-\d{4}$/', $tel );
    return apply_filters( 'wpcf7_is_tel', $result, $tel );
}

Works Fine.