我怎么能访问这样的PHP数组

$array = array("apple", "banana", "cherry");
echo $array[0]; // 输出 "apple"

$array = array(
    "name" => "John",
    "age" => 30,
    "city" => "New York"
);
echo $array["name"]; // 输出 "John"

$array = array(
    array("apple", "banana"),
    array("cherry", "date")
);
echo $array[0][1]; // 输出 "banana"

$array = array("apple", "banana", "cherry");
foreach ($array as $value) {
    echo $value . "\n";
}

$array = array(
    "name" => "John",
    "age" => 30,
    "city" => "New York"
);
if (array_key_exists("name", $array)) {
    echo "键 'name' 存在";
} else {
    echo "键 'name' 不存在";
}

$array = array(
    "name" => "John",
    "age" => 30,
    "city" => "New York"
);
if (isset($array["name"])) {
    echo "键 'name' 存在且不为null";
} else {
    echo "键 'name' 不存在或者它的值为null";
}

$array = array(
    "name" => "John",
    "age" => 30,
    "city" => "New York"
);
$key = array_search("John", $array);
if ($key !== false) {
    echo "找到了键 '$key'";
} else {
    echo "没有找到键";
}

$array = array(
    array("name" => "John", "age" => 30),
    array("name" => "Jane", "age" => 25),
    array("name" => "Jim", "age" => 40)
);
$names = array_column($array, "name");
print_r($names); // 输出 Array ( [0] => John [1] => Jane [2] => Jim )

$array = array("apple", "banana", "cherry");
$uppercased = array_map("strtoupper", $array);
print_r($uppercased); // 输出 Array ( [0] => APPLE [1] => BANANA [2] => CHERRY )

$array = array("apple", "banana", "cherry");
$longer_than_5 = array_filter($array, function($value) {
    return strlen($value) > 5;
});
print_r($longer_than_5); // 输出 Array ( [1] => banana [2] => cherry )