Answers for "regular expression to check phone number"

phone number regex

^[+]*[(]{0,1}[0-9]{1,4}[)]{0,1}[-\s\./0-9]*$

phone number regex

<!-- html form tag -->
  <form>
    <label>Phone Number Format ((7|8|9)xxxxxxxx)</label>
    <!-- html input type=tel for phone number which contain a pattern -->
    <input type="tel"
           name="phone_number"
           id="phone_number"
           pattern="[789][0-9]{9}"
           required="required"
          />
          
    <!-- html input type=submit for submit a form --> 
    <input type="submit" />
    
  </form>