How to Access Array Values Dynamically Using String Indexes in PHP?

Dynamic Array Access with String Indexes

Consider an array structure as follows:

Array
(
    [0] => Array
        (
            [Data] => Array
                (
                    [id] => 1
                    [title] => Manager
                    [name] => John Smith
                )
         )
    [1] => Array
        (
            [Data] => Array
                 (
                     [id] => 1
                     [title] => Clerk
                     [name] =>
                         (
                             [first] => Jane
                             [last] => Smith
                         )
                 )

        )

)

The requirement is to design a function that accepts a string representing an array index path and returns the corresponding array value. For instance, the index path "0['name']" would return "Manager," while "1'name'" would yield "Jane." The number of array levels in the index path can vary.

Solution

To achieve this, utilize the explode() function to split the string index path into an array of individual keys. Iterate through the keys using a foreach loop, navigating the array levels accordingly. The resulting value can be retrieved and assigned to a variable. Here's a practical implementation:

function getArrayValue($indexPath, $arrayToAccess)
{
    $paths = explode(":", $indexPath);
    $itens = $arrayToAccess;
    foreach($paths as $ndx){
        $itens = $itens[$ndx];
    }
    return $itens;
}

By utilizing this function, you can dynamically access array values using a string as the index path, providing a convenient and flexible method for data retrieval.

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