从句子中提取短语的算法[关闭]

Question

我一直坚持实现从句子中提取短语的算法。每个短语必须包含 2 到 5 个单词。例如，我有一个句子'This text is about my hope to test it'。我需要从这句话中得到一个包含下一个短语的数组：

1. 这段文字
2. 此文本是
3. 本文是关于
4. 这篇文章是关于我的
5. 文字是
6. 文字是关于
7. 文字是关于我的
8. 文字是我的愿望
9. 是关于
10. 是关于我的
11. 是关于我的愿望
12. 是关于我的愿望
13. 关于我的
14. 关于我的愿望
15. 关于我的愿望
16. 关于我的测试愿望
17. 我的愿望
18. 我的愿望
19. 我想测试一下
20. 我想测试一下
21. 希望
22. 希望测试
23. 想测试一下
24. 测试
25. 进行测试
26. 测试一下

在 PHP 中，我从这样的代码开始：

$text = 'This text is about my wish to test it';
$words = explode(' ', $text); 
// $words = ['This', 'text', 'is', 'about', 'my', 'wish', 'to', 'test', 'it']

请帮我实现主要算法。它可以使用任何其他编程语言（C、Java、Python），而不仅仅是 PHP。

Answer 1

我需要的算法代码：

$text = 'This text is about my wish to test it';
$words = explode(' ', $text);
$wordsCount = count($words);

for ($i = 0; $i < $wordsCount; $i++) {
    $window = 2;
    $windowEnd = 5;
    if ($i + $windowEnd > $wordsCount) {
        $windowEnd = $wordsCount - $i;
    }
    if ($windowEnd < $window) {
        break;
    }
    while ($window <= $windowEnd) {
        for ($j = $i; $j < $i + $window; $j++) {
            echo $words[$j], "\n";
        }
        echo "\n";
        $window++;
    }
}

Answer 2

在 Java 中

String text = "This text is about my wish to test it";

int indexFirst = 0;
while (indexFirst > -1 && text.length() > indexFirst +1) {
    int indexLast = text.indexOf(" ", indexFirst + 1);
    indexLast = text.indexOf(" ", indexLast + 1);
    while (indexLast > -1 && text.length() > indexLast + 1) {
        System.out.println(text.substring(indexFirst, indexLast));
        indexLast = text.indexOf(" ", indexLast + 1);
    }
    System.out.println(text.substring(indexFirst));
    indexFirst = text.indexOf(" ", indexFirst + 1);
}

返回

This text
This text is
This text is about
This text is about my
This text is about my wish
This text is about my wish to
This text is about my wish to test
This text is about my wish to test it
 text is
 text is about
 text is about my
 text is about my wish
 text is about my wish to
 text is about my wish to test
 text is about my wish to test it
 is about
 is about my
 is about my wish
 is about my wish to
 is about my wish to test
 is about my wish to test it
 about my
 about my wish
 about my wish to
 about my wish to test
 about my wish to test it
 my wish
 my wish to
 my wish to test
 my wish to test it
 wish to
 wish to test
 wish to test it
 to test
 to test it
 test it