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@ 2013-07-02T12:22:40Z

<?php
class ExtendedSPLHeap extends \SPLHeap {

    protected function compare($a, $b) {
        if ($a->latitude == $b->latitude) {
            return 0;
        }
        return ($a->latitude < $b->latitude) ? -1 : 1;
    }

}


$citiesHeap = new \ExtendedSPLHeap();

$file = new \SplFileObject("cities.csv");
$file->setFlags(SplFileObject::DROP_NEW_LINE | SplFileObject::SKIP_EMPTY);
while (!$file->eof()) {
    $cityData = $file->fgetcsv();
    if ($cityData !== NULL) {
        $city = new \StdClass;
        $city->name = $cityData[0];
        $city->latitude = $cityData[1];
        $city->longitude = $cityData[2];

        $citiesHeap->insert($city);
    }
}

echo 'There are ', $citiesHeap->count(), ' cities in the heap', PHP_EOL;

echo 'FROM NORTH TO SOUTH', PHP_EOL;
$citiesHeap->top();
while ($citiesHeap->valid()) {
    $city = $citiesHeap->current();

    echo sprintf(
        "%-20s %+3.4f  %+3.4f" . PHP_EOL,
        $city->name,
        $city->latitude,
        $city->longitude
    );

    $citiesHeap->next();
}

echo 'There are ', $citiesHeap->count(), ' cities in the heap', PHP_EOL;

Output for git.master, git.master_jit, rfc.property-hooks: Deprecated: Return type of ExtendedSPLHeap::compare($a, $b) 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/BRIok on line 4 Fatal error: Uncaught RuntimeException: SplFileObject::__construct(): open_basedir restriction in effect. File(cities.csv) is not within the allowed path(s): (/tmp:/in:/etc) in /in/BRIok:16 Stack trace: #0 /in/BRIok(16): SplFileObject->__construct('cities.csv') #1 {main} thrown in /in/BRIok on line 16
Process exited with code 255.

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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