$schemamarkup = get_post_meta(get_the_ID(), 'schemamarkup', true); if(!empty($schemamarkup)) { echo $schemamarkup; }

MySQL Conditional IF Statement

October 21, 2011 | By Duchateaux.

The MySQL IF Conditional Statement take this General form:

IF (booleanValue, valueReturnedIfTrue, valueReturnedIfFalse)

For booleanValue we Intend every Boolean Value then for Example the Result of a Comparison Statement like: A > B.
The IF MySQL Statement leave your Free to Assign the Value Returned in case of Truth or Untruth. So for Example you can rightly Inverse the Conventional Result giving:

IF (booleanValue, False, True)

This Function will Return False if booleanValue = True and Vice-Versa.