Online PHP editor | rfc for UAV72

@ 2021-05-26T22:26:35Z

<?php

$data = [
    0 => 'Business Services',
    1 => 'Business Services_Consulting',
    2 => 'Business Services_Foodservice Distribution',
    3 => 'Business Services_Information Services',
    4 => 'Consumer',
    5 => 'Consumer_Consumer Discretionary',
    6 => 'Consumer_Consumer Discretionary_Apparel, Footwear & Accessories',
    7 => 'Consumer_Consumer Discretionary_Apparel, Footwear & Accessories_Activewear',
    8 => 'Consumer_Consumer Discretionary_Apparel, Footwear & Accessories_Apparel',
    9 => 'Consumer_Consumer Discretionary_Apparel, Footwear & Accessories_Footwear',
];

// Our output array
$array = [];

foreach ($data as $item) {
    // Store a reference to the "deepest" item (so far)
    $last = &$array;

    // Split on known delim and iterate over
    foreach (explode('_', $item) as $key) {
        // See next comment for what this does.
        if (!is_array($last)) {
            $last = [];
        }

        // Set a key to match the value exactly. If the value has "child" objects, the logic
        // above will take care of removing the value and replacing it with an array.
        if (!array_key_exists($key, $last)) {
            $last[$key] = $key;
        }

        // Reset our "deepest" item
        $last = &$last[$key];
    }
}

echo json_encode($array, JSON_PRETTY_PRINT);

Output for git.master, git.master_jit, rfc.property-hooks: { "Business Services": { "Consulting": "Consulting", "Foodservice Distribution": "Foodservice Distribution", "Information Services": "Information Services" }, "Consumer": { "Consumer Discretionary": { "Apparel, Footwear & Accessories": { "Activewear": "Activewear", "Apparel": "Apparel", "Footwear": "Footwear" } } } }

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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