Question

所以我做了一些研究并解决了大部分问题，但我无法找出为什么这会给我一个Notice: Undefined index: in Line 344 如果你们有任何建议，我们将不胜感激：D

这是我的数组：

$quote = array(

  1 => array(
    "quote" => 'The early bird gets the worm, but the second mouse gets the cheese...',

    "name" => 'Stephen Wright'

    ),
  2 => array(
    "quote" => 'Your time is limited, so dont waste it living someone elses life.',

    "name" => 'Steve Jobs'

    ),
  3 => array(
    "quote" => 'When one door closes, another one opens. Or you could jut re-open the closed door. Because thats how doors work.',

    "name" => "Anon."

    ),
  4 => array(
    "quote" => "The two most important days in your life are the day you are born and the day you find out why.",

    "name" => "Mark Twain"

    ),
  5 => array(
    "quote" => "Before you criticize someone, you should walk a mile in their shoes, that way when you criticize them, you're a mile away and you have their shoes.",

    "name" => "Anon."
    ),
  );
  $random=array_rand($quote,1);

我的输出： [这是第344行]

<?php
    echo $quote[$random[0]]
?>

Answer 1

如果您只使用array_rand()获得1个数组密钥，那么您不会返回数组，只有密钥。正如您在manual：

中看到的那样

选择仅一个条目时，array_rand（）会返回随机条目的键。否则，返回随机条目的键数组。 [...]

所以在此之后你尝试将数字作为一个不起作用的数组来访问。所以只需从中删除索引，例如

echo $quote[$random]
                 //^ See here removed

由于它是一个二维数组，如果你想用echo来打印这个值，你还必须分离第二个维数，例如

echo $quote[$random]["quote"];
echo $quote[$random]["name"];

PHP随机生成器来自数组问题

1 个答案: