What are the best practices for initializing and accessing elements in PHP arrays?

When initializing and accessing elements in PHP arrays, it is important to follow best practices to ensure efficient and error-free code. To initialize an array, use the array() function or square brackets. To access elements in an array, use square brackets with the element's key. It is also recommended to check if an element exists before trying to access it to avoid errors.

// Initializing an array
$fruits = array('apple', 'banana', 'orange');

// Accessing elements in an array
echo $fruits[0]; // Output: apple

// Checking if an element exists before accessing it
if (isset($fruits[1])) {
    echo $fruits[1]; // Output: banana
}