<?php
$arr = array(
"email" => array(TRUE, TRUE, "E-mail:", "Enter email address", "Enter valid email address"),
"name" => array(FALSE, FALSE, "Name:", "Enter full name", "Enter your full name"),
"fname" => array(FALSE, FALSE, "First name:", "Enter first name", "Enter your first name"),
"lname" => array(FALSE, FALSE, "Last name:", "Enter last name", "Enter your last name"),
"age" => array(FALSE, FALSE, "Age:", "Enter age", "Enter your age"),
"gender" => array(FALSE, FALSE, "Gender:", NULL, "Select your gender"),
"phone" => array(FALSE, FALSE, "Phone:", "Enter phone number", "Enter your phone number"),
"website" => array(FALSE, FALSE, "Website:", "Enter website address", "Enter your website address"),
"country" => array(FALSE, FALSE, "Country:", NULL, "Select your country"),
"state" => array(FALSE, FALSE, "State:", "Enter state name", "Enter your state name"),
"city" => array(FALSE, FALSE, "City:", "Enter city name", "Enter your city name"),
"address" => array(FALSE, FALSE, "Address:", "Enter your address", "Enter your address here"),
"zip" => array(FALSE, FALSE, "Zip/Pin code:", "Enter zip/pin code", "Enter your zip/pin code"),
);
$keys = array_keys($arr);
echo implode('", "', $keys);
preferences:
38.63 ms | 402 KiB | 5 Q