SplMinHeap::compare
Compare elements in order to place them correctly in the heap while sifting up
Description
protected int SplMinHeap::compare(mixed $value1, mixed $value2)
Parameters
-
value1
-
The value of the first node being compared.
-
value2
-
The value of the second node being compared.
Return Values
Result of the comparison, positive integer if value1 is lower than value2, 0 if they are equal, negative integer otherwise.
Note:
Having multiple elements with the same value in a Heap is not recommended. They will end up in an arbitrary relative position.