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@ 2014-02-24T13:10:01Z

<?php

$points = [
    [0, -1],
    [-2, 3],
    [4, 0],
    [3, 1],
    [5, 2],
    [0, 1],
];

$max_closest = [];

foreach ($points as $i => list($ax, $ay)) {
        $min_dist = INF;
        $dists = [];

        foreach ($points as $j => list($bx, $by)) {
                if ($i == $j) {
                        continue;
                }
                $dists[$j] = $sq_dist = ($bx - $ax) * ($bx - $ax) + ($by - $ay) * ($by - $ay);

                if ($sq_dist < $min_dist) {
                        $min_dist = $sq_dist;
                }
        }

        // select closest points
        foreach (array_keys($dists, $min_dist, true) as $key) {
                print_r($points[$key]); // print point

                // keep track of points that were closest
                if (isset($max_closest[$key])) {
                        ++$max_closest[$key];
                } else {
                        $max_closest[$key] = 1;
                }
        }
}

rsort($max_closest);

foreach (array_keys($max_closest, $max_closest[0], true) as $key) {
        print_r($points[$key]); // print point
}

Output for git.master, git.master_jit, rfc.property-hooks: Array ( [0] => 0 [1] => 1 ) Array ( [0] => 0 [1] => 1 ) Array ( [0] => 3 [1] => 1 ) Array ( [0] => 4 [1] => 0 ) Array ( [0] => 4 [1] => 0 ) Array ( [0] => 3 [1] => 1 ) Array ( [0] => 0 [1] => -1 ) Array ( [0] => 0 [1] => -1 ) Array ( [0] => -2 [1] => 3 ) Array ( [0] => 4 [1] => 0 )

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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