PHPCon Poland 2024


(PHP 5 >= 5.3.0, PHP 7, PHP 8)

SplMinHeap::compareCompare elements in order to place them correctly in the heap while sifting up


protected SplMinHeap::compare(mixed $value1, mixed $value2): int

Compare value1 with value2.

Bağımsız Değişkenler


The value of the first node being compared.


The value of the second node being compared.

Dönen Değerler

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


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

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