php - preg_match 查找大写单词和连续大写单词

Question

我试图通过仅过滤掉符合以下条件的单词来匹配字符串中的关键字:

• 任何地方都有大写字母的单词，例如“iPhone”或“camelCase”
• 连续大写的词组，例如“Pittsburgh Steelers”或“Oscar De La Hoya”
• 结合上述标准，如“iPhone 5”或“MIB 2”(也将数字视为大写)
• 折叠所有非字符/数字，使“O'Donnell's”成为“ODonnells”，“Wi-fi...”成为“Wifi”

例子:

$string = "Joe O'Donnell and Oscar De La Hoya went to a Pittsburgh Steelers game on Sunday, where Joe lost his iPhone 5, so he borrowed Oscar's iPad";

preg_match_all("/[A-Z][a-z]*/",$string,$match_words); // incorrect expression

// desired result for $match_words should be: 
// array(Joe ODonnell, Oscar De La Hoya, Pittsburgh Steelers, Sunday, Joe, iPhone 5, Oscars, iPad)

谢谢

Answer 1

你可以像这样使用正则表达式:

\b((?:[A-Z]['a-z]*\s*\d*)+)\b|\b((?:[a-z]*[A-Z]['a-z]*\s*\d*)+)\b

Working demo

匹配信息:

MATCH 1
1.  [0-14]  `Joe O'Donnell `
MATCH 2
1.  [18-35] `Oscar De La Hoya `
MATCH 3
1.  [45-65] `Pittsburgh Steelers `
MATCH 4
1.  [73-79] `Sunday`
MATCH 5
1.  [87-91] `Joe `
MATCH 6
2.  [100-108]   `iPhone 5`
MATCH 7
1.  [125-133]   `Oscar's `
MATCH 8
2.  [133-137]   `iPad`

正则表达式由两种模式组成:

\b((?:[A-Z]['a-z]*\s*\d*)+)\b       ---> Match words like Joe O'Connels or Oscar De La Hoya
|
\b((?:[a-z]*[A-Z]['a-z]*\s*\d*)+)\b ---> Match words like iPad or iPhone

顺便说一句，如果您查看结果，它末尾有一个尾随空格，您可以对结果进行修剪以将其清理干净。