Notice: Use of undefined constant INF - assumed 'INF' in /in/8t7OR on line 3
string(3) "INF"
Notice: Use of undefined constant INF - assumed 'INF' in /in/8t7OR on line 4
bool(false)
Notice: Use of undefined constant INF - assumed 'INF' in /in/8t7OR on line 5
bool(false)