<?php
$string = "এখানে কিংকর্তব্যবিমূঢ় হবার কোনো সুযোগ নেই";
$regex = '~^(?:\b\p{Bengali}+\s*){3}~u';
echo $match[0];
}
?>
PD9waHAKJHN0cmluZyA9ICLgpo/gppbgpr7gpqjgp4cg4KaV4Ka/4KaC4KaV4Kaw4KeN4Kak4Kas4KeN4Kav4Kas4Ka/4Kau4KeC4KedIOCmueCmrOCmvuCmsCDgppXgp4vgpqjgp4sg4Ka44KeB4Kav4KeL4KaXIOCmqOCnh+CmhyI7CiRyZWdleCA9ICd+Xig/OlxiXHB7QmVuZ2FsaX0rXHMqKXszfX51JzsKaWYgKHByZWdfbWF0Y2goJHJlZ2V4LCAkc3RyaW5nLCAkbWF0Y2gpKSB7CiAgICBlY2hvICRtYXRjaFswXTsKfQo/Pg==