How to Convert a Dot-Delimited String to a Nested Array?

Converting a Dot-Delimited String to a Nested Array

Given a string representing a nested array structure, such as "Main.Sub.SubOfSub", and a corresponding value like "SuperData", the goal is to transform this data into an actual nested array.

To achieve this conversion, here's a detailed solution:

$key = "Main.Sub.SubOfSub";
$target = array();
$value = "SuperData";

$path = explode('.', $key); // Split the string into an array of keys
$root = &$target; // Reference to the main array

while (count($path) > 1) { // Iterate through the path array
    $branch = array_shift($path); // Get the current branch
    if (!isset($root[$branch])) {
        $root[$branch] = array(); // Create the branch if it doesn't exist
    }
    $root = &$root[$branch]; // Update the reference to the current branch
}

$root[$path[0]] = $value; // Set the value at the end of the path

This code effectively creates a nested array based on the path specified in the string. The variable $root serves as a reference to the current nested level within the array, ensuring that values are assigned to the correct branch as we traverse the path.

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