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(PHP 5 >= 5.3.0)
SplMinHeap::compare — Compare elements in order to place them correctly in the heap while sifting up.
$value1
, mixed $value2
)
Compare value1
with value2
.
value1
The value of the first node being compared.
value2
The value of the second node being compared.
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.
[#1] sixd at php dot net [2010-12-21 12:26:53]
Note the definition of SplMaxHeap::compare() is different from SplMinHeap::compare()