Notice: Use of undefined constant NAN - assumed 'NAN' in /in/ehVF6 on line 2
Notice: Use of undefined constant NAN - assumed 'NAN' in /in/ehVF6 on line 2
bool(true)
Notice: Use of undefined constant NAN - assumed 'NAN' in /in/ehVF6 on line 3
Notice: Use of undefined constant NAN - assumed 'NAN' in /in/ehVF6 on line 3
bool(false)