What is the most efficient way to access a specific element in a multidimensional array in PHP?

When accessing a specific element in a multidimensional array in PHP, the most efficient way is to use the array index notation for each dimension of the array. This means specifying the index for each level of the array to directly access the desired element.

// Example of accessing a specific element in a multidimensional array
$multiArray = array(
    array(1, 2, 3),
    array(4, 5, 6),
    array(7, 8, 9)
);

$element = $multiArray[1][2]; // Accessing the element at row 1, column 2

echo $element; // Output: 6