Heim > 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

WBOY
Freigeben: 2016-06-13 09:21:44
Original
950 Leute haben es durchsucht

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>?>
Nach dem Login kopieren

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>?>
Nach dem Login kopieren

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>
Nach dem Login kopieren

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。

Verwandte Etiketten:
Quelle:php.cn
Erklärung dieser Website
Der Inhalt dieses Artikels wird freiwillig von Internetnutzern beigesteuert und das Urheberrecht liegt beim ursprünglichen Autor. Diese Website übernimmt keine entsprechende rechtliche Verantwortung. Wenn Sie Inhalte finden, bei denen der Verdacht eines Plagiats oder einer Rechtsverletzung besteht, wenden Sie sich bitte an admin@php.cn
Beliebte Empfehlungen
Beliebte Tutorials
Mehr>
Neueste Downloads
Mehr>
Web-Effekte
Quellcode der Website
Website-Materialien
Frontend-Vorlage