<?php

$heap = new SplMaxHeap();
$heap->insert('c');
$heap->insert('b');
$heap->insert('a');
$heap->insert('d');

echo 'top element: ' . $heap->top() . PHP_EOL;

foreach($heap as $val) {
    echo $val . PHP_EOL;
}

top element: d
d
c
b
a

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PHP 8.2, Laminas MVC 3.2, Symfony 5.2, Laravel 8.28, PHPUnit 9.5, Doctrine ORM 2.8