title: Get DATETIME in php and post it to MySQL for transaction consistency
body: <p>Here is a link to the reason behind this question:
  <a href="https://stackoverflow.com/questions/10113317/now-for-datetime-innodb-transaction-guaranteed">NOW() for DATETIME InnoDB Transaction guaranteed?</a></p>
  
  <p>So to ensure a single transaction with any number of queries (<strong>20+</strong> queries for example) has a 100% <strong>accurate and consistent NOW()</strong> value accross multiple tables, what is the php way to assign a variable equivalent of DATETIME using NOW() (not current TIMESTAMP).</p>