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? ??? ?? PHP ???? ? ??? ?? ???? PHP? ??? ??? 2?? ??? ??? ???????

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Nov 01, 2024 am 07:09 AM

How do you flatten multidimensional arrays in PHP into a two-dimensional array with dot notation keys?

PHP?? ? ??? ?? ???? ??? ??? 2D ??? ??

PHP? ??? ??? ??? ??? ??? ???? ??? ??? ?????. ??? ??? ? ???? ???? ??? ??? 2?? ??? ????? ? ?? ????. ?? ??? ?? ??? ???? ??? ? ????.

?? ?? ?????.

<code class="php">$myArray = [
    'key1' => 'value1',
    'key2' => [
        'subkey' => 'subkeyval'
    ],
    'key3' => 'value3',
    'key4' => [
        'subkey4' => [
            'subsubkey4' => 'subsubkeyval4',
            'subsubkey5' => 'subsubkeyval5',
        ],
        'subkey5' => 'subkeyval5'
    ]
];</code>

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<code class="php">$ritit = new RecursiveIteratorIterator(new RecursiveArrayIterator($myArray));
$result = [];
foreach ($ritit as $leafValue) {
    $keys = [];
    foreach (range(0, $ritit->getDepth()) as $depth) {
        $keys[] = $ritit->getSubIterator($depth)->key();
    }
    $result[join('.', $keys)] = $leafValue;
}</code>

? ??? RecursiveIteratorIterator ? RecursiveArrayIterator ???? ???? ??? ??? ????? ?????. ??? ? ?? ?? ?? ?? ??? ?? ??? ?? ???? ? ??? ?? ?????. ??? ??? ?? ? ??? ?? ?? ??? 2?? ?????.

<code class="php">[
    'key1' => 'value1',
    'key2.subkey' => 'subkeyval',
    'key3' => 'value3',
    'key4.subkey4.subsubkey4' => 'subsubkeyval4',
    'key4.subkey4.subsubkey5' => 'subsubkeyval5',
    'key4.subkey5' => 'subkeyval5'
]</code>

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