Online PHP editor | rfc for JKhtR

@ 2020-06-16T23:45:59Z

<?php

function sanitizeColumnReference($row, $columnReference) {
    if (!isset($row[$columnReference]) && is_int($columnReference)) {
        $columnReference = array_keys($row)[$columnReference] ?? null;  // attempt to derive column name by position
        if ($columnReference === null) {
            throw new Exception('Failed to locate column by position using column reference: ' . $columnReference);
        }
    }
    return $columnReference;
}

function dynamicSort(&$input, $sortingRules) {
    if (!$input || !$sortingRules || !is_array($input) || !is_array($sortingRules)) {
        return;  // return silently
    }
    $firstRow = current($input);
    $sortingParams = [];
    foreach ($sortingRules as $rule) {
        $rule = (array)$rule; // permit the passing of a solitary string as a sorting rule
        $columnReference = sanitizeColumnReference($firstRow, array_shift($rule)); 
        $column = array_column($input, $columnReference);
        if (!$column) {
            throw new Exception('Failed to source sortable data from column reference: ' . $columnReference);
        }
        $sortingParams[] = $column;
        foreach ($rule as $flag) {
            $sortingParams[] = constant('SORT_' . strtoupper($flag));  // convert strings to usable CONSTANTs
        }
    }
    $sortingParams[] = &$input;
    var_export($sortingParams);
    array_multisort(...$sortingParams); // unpack into native sorting function
}

$array = [
    ['first_name' => 'Homer', 'last_name' => 'Simpson', 'city' => 'Springfield', 'state' => 'Unknown', 'zip' => '66735'],
    ['first_name' => 'Patty', 'last_name' => 'Bouvier', 'city' => 'Scottsdale', 'state' => 'Arizona', 'zip' => '85250'],
    ['first_name' => 'Moe', 'last_name' => 'Szyslak', 'city' => 'Scottsdale', 'state' => 'Arizona', 'zip' => '85255'],
    ['first_name' => 'Nick', 'last_name' => 'Riviera', 'city' => 'Scottsdale', 'state' => 'Arizona', 'zip' => '85255'],
];

$sortingRules = [
    'city',
    ['zip', 'desc', 'numeric'],
    [1, 'desc'],  // last_name
];

echo "Sorting Params:\n";

dynamicSort($array, $sortingRules);  // this modifies by reference like native sorting functions

echo "\n---\nOutput:\n";

var_export($array);

Output for git.master, git.master_jit, rfc.property-hooks: Sorting Params: array ( 0 => array ( 0 => 'Springfield', 1 => 'Scottsdale', 2 => 'Scottsdale', 3 => 'Scottsdale', ), 1 => array ( 0 => '66735', 1 => '85250', 2 => '85255', 3 => '85255', ), 2 => 3, 3 => 1, 4 => array ( 0 => 'Simpson', 1 => 'Bouvier', 2 => 'Szyslak', 3 => 'Riviera', ), 5 => 3, 6 => array ( 0 => array ( 'first_name' => 'Homer', 'last_name' => 'Simpson', 'city' => 'Springfield', 'state' => 'Unknown', 'zip' => '66735', ), 1 => array ( 'first_name' => 'Patty', 'last_name' => 'Bouvier', 'city' => 'Scottsdale', 'state' => 'Arizona', 'zip' => '85250', ), 2 => array ( 'first_name' => 'Moe', 'last_name' => 'Szyslak', 'city' => 'Scottsdale', 'state' => 'Arizona', 'zip' => '85255', ), 3 => array ( 'first_name' => 'Nick', 'last_name' => 'Riviera', 'city' => 'Scottsdale', 'state' => 'Arizona', 'zip' => '85255', ), ), ) --- Output: array ( 0 => array ( 'first_name' => 'Moe', 'last_name' => 'Szyslak', 'city' => 'Scottsdale', 'state' => 'Arizona', 'zip' => '85255', ), 1 => array ( 'first_name' => 'Nick', 'last_name' => 'Riviera', 'city' => 'Scottsdale', 'state' => 'Arizona', 'zip' => '85255', ), 2 => array ( 'first_name' => 'Patty', 'last_name' => 'Bouvier', 'city' => 'Scottsdale', 'state' => 'Arizona', 'zip' => '85250', ), 3 => array ( 'first_name' => 'Homer', 'last_name' => 'Simpson', 'city' => 'Springfield', 'state' => 'Unknown', 'zip' => '66735', ), )

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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
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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
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