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@ 2013-11-16T23:59:30Z

<?php

abstract class AHeap extends SplHeap
{
    public function __construct($i)
    {
        foreach ($i as $obj) {
            $this->insert($obj);
        }
    }
}

class KeySort extends AHeap
{
    public function compare($val1, $val2)
    {
        if ($val1->key == $val2->key)
            return 0;

        if ($val1->key > $val2->key){
            return -1;
        }
        else {
            return 1;
        }
    }
}

class ValueSort extends AHeap
{
    public function compare($val1, $val2)
    {
        if ($val1->value == $val2->value)
            return 0;

        if ($val1->value < $val2->value){
            return -1;
        }
        else {
            return 1;
        }
    }
}

$array = array(
	(object) array('key' => 0, 'value' => 'z'),
    (object) array('key' => 1, 'value' => 'a'),
    (object) array('key' => 2, 'value' => 'y'),
    (object) array('key' => 3, 'value' => 'b'),
);

$heap = new ValueSort($array);

foreach ($heap as $val) {
	echo $val->key . ' - ' . $val->value . PHP_EOL;
}

Output for git.master, git.master_jit, rfc.property-hooks: Deprecated: Return type of KeySort::compare($val1, $val2) should either be compatible with SplHeap::compare(mixed $value1, mixed $value2): int, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/EPva0 on line 15 Deprecated: Return type of ValueSort::compare($val1, $val2) should either be compatible with SplHeap::compare(mixed $value1, mixed $value2): int, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/EPva0 on line 31 0 - z 2 - y 3 - b 1 - a

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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