SplMaxHeap::compare
Compare elements in order to place them correctly in the heap while sifting up
Description
protected int SplMaxHeap::compare(mixed $value1, mixed $value2)
Parameters
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value1
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The value of the first node being compared.
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value2
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The value of the second node being compared.
Return Values
Result of the comparison, positive integer if value1 is greater 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.