PHP：根据另一个先前的值（也是随机的）从数组中回显随机值

Question

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

<?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>";

?>

我需要输出是这样的：

“标题 2

word2、word4、word5、word7”，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以使其更易于理解。）

每次刷新页面时，预计会回显不同的值。

// 编辑以进一步解释 //

当它刷新时，它应该回显另一个标题和与该标题相关的另一组 4 个单词。

PS：Srsly，为什么投反对票？ 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，如下所示：

$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[$rand_title]]作为你的 words 子$words[$titles[$rand_title]] 。

但是，如果您不能（或绝对不想）使用二维数组，则始终可以使用可变变量：

<?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>";

?>