SplPriorityQueue::compare
PHP function
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(PHP 5 >= 5.3.0, PHP 7, PHP 8)
Compare priorities in order to place elements correctly in the heap while sifting up
Description
SplPriorityQueue::compare(mixed $priority1, mixed $priority2): int
Compare priority1 with priority2.
Parameters
priority1The priority of the first node being compared.
priority2The priority of the second node being compared.
Return Values
Result of the comparison, positive integer if priority1 is greater than priority2, 0 if they are equal, negative integer otherwise.
Note
Multiple elements with the same priority will get dequeued in no particular order.