soderlind/acf-field-date-time-picker — pull request #38 by jtbonaccorsi (2013-11-25 15:32:13+00:00)
Title: Fixing check for a valid timestamp

Fixing implementation of isValidTimestamp to correctly validate for a valid timestamp, based on suggestions here: http://stackoverflow.com/questions/3377537/checking-if-a-string-contains-an-integer/3377560#3377560