Online PHP editor | rfc for HOkj7

@ 2022-02-27T05:15:31Z

<?php

function getValue($haystack, $indexes) {
    $indices = explode(',', $indexes);
    $finalIndex = array_pop($indices);
    $keys = [];
    foreach ($indices as $keys[]) {
        $keys[] = 'children';
    }
    array_push($keys, $finalIndex, 'country', 'city');
    //var_export($keys);

    foreach ($keys as $level => $key) {
        if (!key_exists($key, $haystack)) {
            throw new Exception(
                sprintf(
                    "Path attempt failed for [%s]. No `%s` key found on levelIndex %d",
                    implode('][', $keys),
                    $key,
                    $level
                )
            );
        }
        $haystack = $haystack[$key];
    }
    return $haystack;
}

$test = [
    [
        'children' => [
            [
                'children' => [
                    [
                        'country' => [
                            'city' => 'Paris',
                         ]
                    ],
                    [
                        'country' => [
                            'city' => 'Kyiv',
                         ]
                    ]
                ]
            ]
        ]
    ],
    [
        'children' => [
            [
                'country' => [
                    'city' => 'New York',
                ]
            ],
            [
                'country' => [
                    'city' => 'Sydney',
                ]
            ]
        ]
    ]
];

$result = [];
try {
    $result['0,0,0'] = getValue($test, '0,0,0');
    $result['1,0'] = getValue($test, '1,0');
    $result['1,0,0'] = getValue($test, '1,0,0');
} catch (Exception $e) {
    echo $e->getMessage() . "\n---\n";
}
var_export($result);

Output for git.master, git.master_jit, rfc.property-hooks: Path attempt failed for [1][children][0][children][0][country][city]. No `children` key found on levelIndex 3 --- array ( '0,0,0' => 'Paris', '1,0' => 'New York', )

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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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