How can one determine if an array entry should be considered a sub-entry and displayed in a nested format in PHP?

To determine if an array entry should be considered a sub-entry and displayed in a nested format in PHP, you can check if the value of the entry is an array itself. If it is an array, then it should be displayed in a nested format. You can achieve this by using a recursive function to iterate through the array and display nested entries accordingly. 

function displayNestedArray($array) {
    echo "<ul>";
    foreach ($array as $key => $value) {
        echo "<li>";
        echo $key;
        if (is_array($value)) {
            displayNestedArray($value);
        } else {
            echo " : " . $value;
        }
        echo "</li>";
    }
    echo "</ul>";
}

$array = [
    "key1" => "value1",
    "key2" => [
        "subkey1" => "subvalue1",
        "subkey2" => "subvalue2"
    ],
    "key3" => "value3"
];

displayNestedArray($array);

Keywords

array sub-entry nested format PHP determine

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