SplHeap::compare
SplHeap::compare
(PHP 5 >= 5.3.0, PHP 7)
SplHeap::compare — Compare elements in order to place them correctly in the heap while sifting up.
Description
abstract protected int SplHeap::compare ( mixed $value1 , mixed $value2 )
Compare value1 with value2.
Warning
Throwing exceptions in SplHeap::compare() can corrupt the Heap and place it in a blocked state. You can unblock it by calling 登录查看完整内容