Notice: Use of undefined constant NAN - assumed 'NAN' in /in/kSm53 on line 2
Compare two numeric strings (same semantic 1): (NAN == 0) = true
Notice: Use of undefined constant NAN - assumed 'NAN' in /in/kSm53 on line 3
Compare two numeric strings (same semantic 2): (NAN > 1 ) = false
Notice: Use of undefined constant NAN - assumed 'NAN' in /in/kSm53 on line 4
Compare two numeric strings (same semantic 3): (NAN < 1) = false
Notice: Use of undefined constant NAN - assumed 'NAN' in /in/kSm53 on line 5
Compare two numeric strings (same semantic 4): (NAN == -1) = false
Notice: Use of undefined constant NAN - assumed 'NAN' in /in/kSm53 on line 6
Compare two numeric strings (same semantic 5): (NAN > -1) = true
Notice: Use of undefined constant NAN - assumed 'NAN' in /in/kSm53 on line 7
Compare two numeric strings (same semantic 6): (NAN > -1) = true