How can a dynamic array index identifier be formed and retrieved in PHP?

To form a dynamic array index identifier in PHP, you can concatenate a string or variable with the index value. To retrieve the value, you can use the same concatenated string or variable to access the array element. Example: 

// Forming dynamic array index identifier
$index = 2;
$identifier = "element_" . $index;

$array = [
    "element_1" => "Value 1",
    "element_2" => "Value 2",
    "element_3" => "Value 3"
];

// Retrieving value using dynamic array index identifier
echo $array[$identifier]; // Output: Value 2

Keywords

dynamic array index identifier retrieval PHP associative array

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