Question

我需要根据array_rand（）的先前结果回显一系列四个字符串。到目前为止，我有这个：

<?php

$titles = array('title1','title2','title3','title4');

$title1_words = array('word1','word2','word3','word4','word5','word6','word7');
$title2_words = array('word1','word2','word3','word4','word5','word6','word7');
$title3_words = array('word1','word2','word3','word4','word5','word6','word7');
$title4_words = array('word1','word2','word3','word4','word5','word6','word7');

$rand_title = array_rand($titles, 1);
echo $rand_title . "<br>";


//print 4 random words from one group
$rand_words = array_rand($title1_words, 4);
echo $title1_words[$rand_words[0]] . "<br>";
echo $title1_words[$rand_words[1]] . "<br>";
echo $title1_words[$rand_words[2]] . "<br>";
echo $title1_words[$rand_words[3]] . "<br>";

?>

我需要输出类似于：

＆＃34; Title 2

word2，word4，word5，word7＆＃34;，其中这些单词实际上与主标题相关。

（单词因组而异。我只是使用相同的名称来使其更容易理解。）

每次刷新页面时都应该回显不同的值。

//编辑以获得进一步说明//

当它刷新时，它应该回显另一个标题和另一组与该标题相关的4个单词。

P.S。：Srsly，为什么下来投票？至少解释一下。

Answer 1

正如评论中所解释的，处理这个问题的最好方法是将你的单词存储在一个二维数组中，如下：

$words = array(
    'title1' => array('word1','word2','word3','word4','word5','word6','word7')),
    'title2' => array('word1','word2','word3','word4','word5','word6','word7')),
    'title3' => array('word1','word2','word3','word4','word5','word6','word7')),
    'title4' => array('word1','word2','word3','word4','word5','word6','word7')),
);

然后使用$words[$titles[$rand_title]]作为您的单词子阵列。

但是，如果你不能（或绝对不想）使用二维数组，你总是可以使用 variable variables ：

<?php

$titles = array('title1','title2','title3','title4');

$title1_words = array('word1','word2','word3','word4','word5','word6','word7');
$title2_words = array('word1','word2','word3','word4','word5','word6','word7');
$title3_words = array('word1','word2','word3','word4','word5','word6','word7');
$title4_words = array('word1','word2','word3','word4','word5','word6','word7');

$rand_title = array_rand($titles, 1);
echo $rand_title . "<br>";

$title = $titles[$rand_title]; // should be title2, for instance
$words_array = ${$title . '_words'}; // should be $title2_words, for instance

$rand_words = array_rand($words_array, 4);
echo $words_array[$rand_words[0]] . "<br>";
echo $words_array[$rand_words[1]] . "<br>";
echo $words_array[$rand_words[2]] . "<br>";
echo $words_array[$rand_words[3]] . "<br>";

?>

PHP：根据另一个先前的值从数组中回收随机值，也是随机的

1 个答案: