Validating the name (Recurcivly)

It will recursively check that given text is valid name or not.

Pattern Rules:
1. Only A to Z, a to z , space and - (dash) are allowed.
2. Repeated spaces, dashes (-) at once are now allowed.

<?php
/*
    Validating the name (Recurcivly)
    -----------------------------------------
    (Logic/Pattern) Written by Junaid Atari
   
    + Examples:
      - Muhammad
      - Junaid Atari
      - Sag-e-Attar       
*/

//# Name to validate.
$name = 'Ali Attar';

echo preg_match ('/^([a-zA-Z]+)(?:[a-zA-Z]+[\s-]?)*$/', $name)
        ? 'Name is Valid'
        : 'Name is not valid';