Compare elements in order to place them correctly in the heap while sifting up.

SplMinHeap::compare

(No version information available, might be only in CVS)

SplMinHeap::compare — Compare elements in order to place them correctly in the heap while sifting up.

void SplMinHeap::compare ( mixed $value1 , mixed $value2 )

Compare value1 with value2 .

Result of the comparison, positive integer if value1 is lower than value2 , 0 if they are equal, negative integer otherwise.

Informacja: Having multiple elements with the same value in a Heap is not recommended. They will end up in an arbitrary relative position.