Cron Job for Ubunto LEMP Stack

Simple cron job php script

<?php
$dir = '/usr/share/nginx/html/mobile-api/LoveIsTheAnswer';
if (!file_exists($dir)) {
    mkdir($dir, 0700, true);
}

Location: /usr/share/nginx/html/mobile-api/create.php

Crontab

1 * * * * /sur/share/nginx/html/mobile-api/create.php

My questions are.

1. Any third party to install before running the cron job?
2. The cron job does not working. Any missing code on the crontab?
3. What crontab command to use in executing the create.php to test in putty before setting up to crontab file.

Thank you.