Tell us what does this var_dump return!
var_dump(
null == 0, # ?
false == 0, # ?
INF==INF, # ?
(-1*INF) == (-1*INF), # ?
(-1*INF) < (-1*INF), # ?
(-1*INF) > (-1*INF), # ?
'Interesting',
null == (-1*INF), # ?
false == (-1*INF), # ?
null < (-1*INF), # ?
false < (-1*INF) # ?
);