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@ 2019-06-11T11:20:15Z

<?php 
// arrB to not get changes reflected once we sort
$arrB = $array = [4, 1, 5, 52, 75, 52, 24];
function findMinDiff($arr)
{
    $n = count($arr);
// Initialize difference
    // as infinite
    $diff = PHP_INT_MAX;
// Find the min diff by comparing
    // difference of all possible
    // pairs in given array
    $two_values = [];
    for ($i = 0; $i < $n - 1; $i++) {
        for ($j = $i + 1; $j < $n; $j++) {
            if (abs($arr[$i] - $arr[$j]) < $diff) {
                $diff = abs($arr[$i] - $arr[$j]);
                $two_values['values'] = [$arr[$i], $arr[$j]];
                $two_values['keys']   = [$i, $j];
                $two_values['diff']   = $diff;
            }
        }
    }
    
// Return min diff
    return $two_values;
}
print_r(findMinDiff($array));

Output for git.master, git.master_jit, rfc.property-hooks: Array ( [values] => Array ( [0] => 52 [1] => 52 ) [keys] => Array ( [0] => 3 [1] => 5 ) [diff] => 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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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