PHP字符串word末字符大小写互换
2014-11-09 22:53
288 查看
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
<?php function convertLastChar($str) { $markArr = array(", ", "' ", "\" ", ". ", "; "); $ret = ""; for ($i = 0, $j = strlen($str); $i < $j; $i++) { if ($i < $j - 2) { $afterStr = $str{$i + 1} . $str{$i + 2}; } else if ($i < $j - 1) { $afterStr = $str{$i + 1} . " "; } if (in_array($afterStr, $markArr) || $i == $j - 1 || $str{$i + 1} == " ") { $ret .= strtoupper($str{$i}) === $str{$i} ? strtolower($str{$i}) : strtoupper($str{$i}); } else { $ret .= $str{$i}; } } return $ret; } ?>
测试
<?php //test $str1 = "A journey of, a thousand 'miles' must can't \"begin\" with a single step."; $str2 = "A journey of, a thousand 'miles' must can't \"begin\" with a single step. "; $str3 = "A journey of, a thousand 'miles' must can't \"begin\" with a single step. a "; $str4 = "A journey of, a thousand 'miles' must can't \"begin\" with a single step. a B"; $str5 = "A journey of, a thousand 'miles' must can't \"begin\" with a single step. a b'"; $str6 = "A journey of, a thousand 'miles' must can't \"begin\" with a single step. a B\""; echo "source:<br/>" . $str1 . "<br/>result:<br/>" . convertLastChar($str1) . "<br/><br/>"; echo "source:<br/>" . $str2 . "<br/>result:<br/>" . convertLastChar($str2) . "<br/><br/>"; echo "source:<br/>" . $str3 . "<br/>result:<br/>" . convertLastChar($str3) . "<br/><br/>"; echo "source:<br/>" . $str4 . "<br/>result:<br/>" . convertLastChar($str4) . "<br/><br/>"; echo "source:<br/>" . $str5 . "<br/>result:<br/>" . convertLastChar($str5) . "<br/><br/>"; echo "source:<br/>" . $str6 . "<br/>result:<br/>" . convertLastChar($str6) . "<br/><br/>"; ?>
结果:
source: A journey of, a thousand 'miles' must can't "begin" with a single step. result: a journeY oF, A thousanD 'mileS' musT can'T "begiN" witH A singlE steP. source: A journey of, a thousand 'miles' must can't "begin" with a single step. result: a journeY oF, A thousanD 'mileS' musT can'T "begiN" witH A singlE steP. source: A journey of, a thousand 'miles' must can't "begin" with a single step. a result: a journeY oF, A thousanD 'mileS' musT can'T "begiN" witH A singlE steP. A source: A journey of, a thousand 'miles' must can't "begin" with a single step. a B result: a journeY oF, A thousanD 'mileS' musT can'T "begiN" witH A singlE steP. A b source: A journey of, a thousand 'miles' must can't "begin" with a single step. a b' result: a journeY oF, A thousanD 'mileS' musT can'T "begiN" witH A singlE steP. A B' source: A journey of, a thousand 'miles' must can't "begin" with a single step. a B" result: a journeY oF, A thousanD 'mileS' musT can'T "begiN" witH A singlE steP. A b"
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。相关文章推荐
- PHP字符串word末字符实现大小写互换的方法
- PHP字符串word末字符实现大小写互换的方法
- jquery 多维数组实现PHP的count、in_array(不区分大小写),utf8字符串(包含中文,中文字符2个字节)字节统计
- PHP字符串word实现末字符大小互换
- PHP字符串word实现末字符大小互换
- 学python(03)—— 如何使用函数实现一个随机字符串里的大小写字符互换
- php 字符串操作 字符 php
- php统计字符串中中英文字符的个数
- C# 3.0 Cookbook:一、字符与字符串处理(4):在比较两个字符串时控制大小写敏感性
- PHP字符串翻转函数 支持中文字符(GBK编码)
- php判断字符串是否含有中文字符
- PHP去掉字符串的最后一个字符
- 《C++标准函数库》中说的有三个函数可以将字符串的内容转换为字符数组和C—string (CString、char*、String三种类型互换)
- php去掉字符串的最后一个字符
- PHP截取字符串,获取长度,获取字符位置的函数
- php 中查找某个字符在字符串中出现的所有位置
- php去掉字符串的最后一个字符 substr()的用法
- C# 3.0 CookBook: 二、字符与字符串处理(2):两个字符相比较时控制大小写
- php处理字符串,判断是否含有特殊符号,非中文,数字,字符
- PHP stristr() 函数(不区分大小写的字符串查找)