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@ 2019-01-18T02:33:24Z

<?php
$array = array (
    'strMachineGroupID' => 'MC000027',
    'strMachineGroup' => 1,
    'April-201904_QTY' => 1,
    'February-201902_QTY' => 1,
    'January-201901_QTY' => 1,
    'July-201907_QTY' => 1,
    'June-201906_QTY' => 1,
    'March-201903_QTY' => 1,
    'May-201905_QTY' => 1,
    'strMachineGroupIDUE' => 'MC000027',
    'April-201904_UE' => 1.00,
    'February-201902_UE' => 1.00,
    'January-201901_UE' => 1.00,
    'July-201907_UE' => 1.00,
    'June-201906_UE' => 1.00,
    'March-201903_UE' => 1.00,
    'May-201905_UE' => 1.00
);
uksort($array, function ($k1, $k2) {
    if (preg_match('/^\w+-(\d{6})_\w+$/', $k1, $m1)) {
        if (preg_match('/^\w+-(\d{6})_\w+$/', $k2, $m2)) {
            // both have dates, sort on that
            return strcmp($m1[1], $m2[1]);
        }
        else {
            // dates sort first
            return -1;
        }
    }
    elseif (preg_match('/^\w+-(\d{6})_\w+$/', $k2, $m2)) {
        // dates sort first
        return 1;
    }
    else {
        // neither is a date, sort alphabetically
        return strcmp($k1, $k2);
    }
});
print_r($array);

Output for git.master, git.master_jit, rfc.property-hooks: Array ( [January-201901_QTY] => 1 [January-201901_UE] => 1 [February-201902_QTY] => 1 [February-201902_UE] => 1 [March-201903_QTY] => 1 [March-201903_UE] => 1 [April-201904_QTY] => 1 [April-201904_UE] => 1 [May-201905_QTY] => 1 [May-201905_UE] => 1 [June-201906_QTY] => 1 [June-201906_UE] => 1 [July-201907_QTY] => 1 [July-201907_UE] => 1 [strMachineGroup] => 1 [strMachineGroupID] => MC000027 [strMachineGroupIDUE] => MC000027 )

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2022-12-01 RFC: Property hooks - included in PHP 8.4
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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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