搜尋
首頁php教程php手册PHP字符串word末字符大小写互换,字符串大小写

PHP字符串word末字符大小写互换,字符串大小写

要求

给出一个字符串如 “A journey of, a thousand 'miles' must can't \"begin\" with a single step.” ,通过 PHP 程序处理变成 “a journeY oF, A thousanD 'mileS' musT can'T "begiN" witH A singlE steP.”

注意:
1、每个单词最后的字符如果是大写就变成小写,如果是小写就变成大写。
2、需要考虑类似  can't 这种形式的转换。
3、标点符号(只考虑 , ' " . ;)不用变化。

参考算法

<?<span>php

    </span><span>function</span> convertLastChar(<span>$str</span><span>) {
        </span><span>$markArr</span> = <span>array</span>(", ", "' ", "\" ", ". ", "; "<span>);
        </span><span>$ret</span> = ""<span>;
        </span><span>for</span> (<span>$i</span> = 0, <span>$j</span> = <span>strlen</span>(<span>$str</span>); <span>$i</span> < <span>$j</span>; <span>$i</span>++<span>) {
            </span><span>if</span> (<span>$i</span> < <span>$j</span> - 2<span>) {
                </span><span>$afterStr</span> = <span>$str</span>{<span>$i</span> + 1} . <span>$str</span>{<span>$i</span> + 2<span>};
            } </span><span>else</span> <span>if</span> (<span>$i</span> < <span>$j</span> - 1<span>) {
                </span><span>$afterStr</span> = <span>$str</span>{<span>$i</span> + 1} . " "<span>;
            }
            </span><span>if</span> (<span>in_array</span>(<span>$afterStr</span>, <span>$markArr</span><span>) 
                </span>|| <span>$i</span> == <span>$j</span> - 1 
                || <span>$str</span>{<span>$i</span> + 1} == " "<span>) {
                </span><span>$ret</span> .= <span>strtoupper</span>(<span>$str</span>{<span>$i</span>}) === <span>$str</span>{<span>$i</span><span>} 
                    </span>? <span>strtolower</span>(<span>$str</span>{<span>$i</span><span>}) 
                    </span>: <span>strtoupper</span>(<span>$str</span>{<span>$i</span><span>});
            } </span><span>else</span><span> {
                </span><span>$ret</span> .= <span>$str</span>{<span>$i</span><span>};
            }
        }
        </span><span>return</span> <span>$ret</span><span>;
    }

</span>?>

测试

<?<span>php

    </span><span>//</span><span>test</span>
    <span>$str1</span> = "A journey of, a thousand 'miles' must can't \"begin\" with a single step."<span>;
    </span><span>$str2</span> = "A journey of, a thousand 'miles' must can't \"begin\" with a single step. "<span>;
    </span><span>$str3</span> = "A journey of, a thousand 'miles' must can't \"begin\" with a single step. a "<span>;
    </span><span>$str4</span> = "A journey of, a thousand 'miles' must can't \"begin\" with a single step. a B"<span>;
    </span><span>$str5</span> = "A journey of, a thousand 'miles' must can't \"begin\" with a single step. a b'"<span>;
    </span><span>$str6</span> = "A journey of, a thousand 'miles' must can't \"begin\" with a single step. a B\""<span>;

    </span><span>echo</span> "source:<br/>" . <span>$str1</span> . "<br/>result:<br/>" . convertLastChar(<span>$str1</span>) . "<br/><br/>"<span>;
    </span><span>echo</span> "source:<br/>" . <span>$str2</span> . "<br/>result:<br/>" . convertLastChar(<span>$str2</span>) . "<br/><br/>"<span>;
    </span><span>echo</span> "source:<br/>" . <span>$str3</span> . "<br/>result:<br/>" . convertLastChar(<span>$str3</span>) . "<br/><br/>"<span>;
    </span><span>echo</span> "source:<br/>" . <span>$str4</span> . "<br/>result:<br/>" . convertLastChar(<span>$str4</span>) . "<br/><br/>"<span>;
    </span><span>echo</span> "source:<br/>" . <span>$str5</span> . "<br/>result:<br/>" . convertLastChar(<span>$str5</span>) . "<br/><br/>"<span>;
    </span><span>echo</span> "source:<br/>" . <span>$str6</span> . "<br/>result:<br/>" . convertLastChar(<span>$str6</span>) . "<br/><br/>"<span>;
</span>?>

结果:

source:<span>
A journey of</span>, a thousand 'miles' must can'<span>t "begin" with a single step.
result:
a journeY oF, A thousanD </span>'mileS' musT can'T "begiN" witH A singlE steP.<span>

source</span>:<span>
A journey of</span>, a thousand 'miles' must can'<span>t "begin" with a single step. 
result:
a journeY oF, A thousanD </span>'mileS' musT can'T "begiN" witH A singlE steP.<span> 

source</span>:<span>
A journey of</span>, a thousand 'miles' must can'<span>t "begin" with a single step. a 
result:
a journeY oF, A thousanD </span>'mileS' musT can'T "begiN" witH A singlE steP.<span> A 

source</span>:<span>
A journey of</span>, a thousand 'miles' must can'<span>t "begin" with a single step. a B
result:
a journeY oF, A thousanD </span>'mileS' musT can'T "begiN" witH A singlE steP.<span> A b

source</span>:<span>
A journey of</span>, a thousand 'miles' must can't "begin" with a single step. a b'<span>
result</span>:<span>
a journeY oF</span>, A thousanD 'mileS' musT can'T "begiN" witH A singlE steP. A B'<span>

source</span>:<span>
A journey of</span>, a thousand 'miles' must can'<span>t "begin" with a single step. a B"
result:
a journeY oF, A thousanD </span>'mileS' musT can'T "begiN" witH A singlE steP. A b"<span><br /></span>

我们可以看到,是符合预期的。

题目来源

http://blog.sijiaomao.com/?p=98,有改动(增加了can't这种),按改后的规则,原文答案全是错的。

陳述
本文內容由網友自願投稿,版權歸原作者所有。本站不承擔相應的法律責任。如發現涉嫌抄襲或侵權的內容,請聯絡admin@php.cn

熱AI工具

Undresser.AI Undress

Undresser.AI Undress

人工智慧驅動的應用程序,用於創建逼真的裸體照片

AI Clothes Remover

AI Clothes Remover

用於從照片中去除衣服的線上人工智慧工具。

Undress AI Tool

Undress AI Tool

免費脫衣圖片

Clothoff.io

Clothoff.io

AI脫衣器

Video Face Swap

Video Face Swap

使用我們完全免費的人工智慧換臉工具,輕鬆在任何影片中換臉!

熱工具

EditPlus 中文破解版

EditPlus 中文破解版

體積小,語法高亮,不支援程式碼提示功能

PhpStorm Mac 版本

PhpStorm Mac 版本

最新(2018.2.1 )專業的PHP整合開發工具

SecLists

SecLists

SecLists是最終安全測試人員的伙伴。它是一個包含各種類型清單的集合,這些清單在安全評估過程中經常使用,而且都在一個地方。 SecLists透過方便地提供安全測試人員可能需要的所有列表,幫助提高安全測試的效率和生產力。清單類型包括使用者名稱、密碼、URL、模糊測試有效載荷、敏感資料模式、Web shell等等。測試人員只需將此儲存庫拉到新的測試機上,他就可以存取所需的每種類型的清單。

Safe Exam Browser

Safe Exam Browser

Safe Exam Browser是一個安全的瀏覽器環境,安全地進行線上考試。該軟體將任何電腦變成一個安全的工作站。它控制對任何實用工具的訪問,並防止學生使用未經授權的資源。

禪工作室 13.0.1

禪工作室 13.0.1

強大的PHP整合開發環境