PHP 如何回显关联数组的某个位置？

$associative_array = array("key1" => "value1", "key2" => "value2");

print_r($associative_array);

$associative_array = array("key1" => "value1", "key2" => "value2");

// 要回显的键
$key = "key1";

// 通过键获取数组元素
$value = $associative_array[$key];

echo $value;