正則表達式：匹配的詞有特殊字符

我試圖找到字符串中的某個字（確切的詞）相匹配的正則表達式。問題是這個詞有什麼特殊的字符，如'＃'或其他。特殊字符可以是任何UTF-8字符，如（「áéíóúñ＃@」），它必須忽略標點符號。正則表達式：匹配的詞有特殊字符

我把我正在尋找一些例子：

Searching:#myword 

Sentence: "I like the elephants when they say #myword" <- MATCH 
Sentence: "I like the elephants when they say #mywords" <- NO MATCH 
Sentence: "I like the elephants when they say myword" <-NO MATCH 
Sentence: "I don't like #mywords. its silly" <- NO MATCH 
Sentence: "I like #myword!! It's awesome" <- MATCH 
Sentence: "I like #myword It's awesome" <- MATCH

PHP示例代碼：

$regexp= "#myword"; 
    if (preg_match("/(\w$regexp)/", "I like #myword!! It's awesome")) { 
     echo "YES YES YES"; 
    } else { 
     echo "NO NO NO "; 
    }

謝謝！

更新：如果我找「myword」這個詞有由「W」，而不是其他字符開始。

Sentence: "I like myword!! It's awesome" <- MATCH 
Sentence: "I like #myword It's awesome" <-NO MATCH

來源

2011-03-21 LDK

如何在第二和第四產生一個匹配和不匹配？ – alex 2011-03-21 13:47:08

它跟一個字母字符和4日就不是 – LDK 2011-03-21 13:51:57

嘗試逃避與\ – Yaronius 2011-03-21 13:57:47

下面的解決方案是在分別考慮字符和邊界時產生的。也可能有一個可行的方法直接使用字邊界。

代碼：

function search($strings,$search) { 
     $regexp = "/(?:[[:space:]]|^)".$search."(?:[^\w]|$)/i"; 
     foreach ($strings as $string) { 
       echo "Sentence: \"$string\" <- " . 
        (preg_match($regexp,$string) ? "MATCH" : "NO MATCH") ."\n"; 
     } 
} 

$strings = array(
"I like the elephants when they say #myword", 
"I like the elephants when they say #mywords", 
"I like the elephants when they say myword", 
"I don't like #mywords. its silly", 
"I like #myword!! It's awesome", 
"I like #mywOrd It's awesome", 
); 
echo "Example 1:\n"; 
search($strings,"#myword"); 

$strings = array(
"I like myword!! It's awesome", 
"I like #myword It's awesome", 
); 
echo "Example 2:\n"; 
search($strings,"myword");

輸出：

Example 1: 
Sentence: "I like the elephants when they say #myword" <- MATCH 
Sentence: "I like the elephants when they say #mywords" <- NO MATCH 
Sentence: "I like the elephants when they say myword" <- NO MATCH 
Sentence: "I don't like #mywords. its silly" <- NO MATCH 
Sentence: "I like #myword!! It's awesome" <- MATCH 
Sentence: "I like #mywOrd It's awesome" <- MATCH 
Example 2: 
Sentence: "I like myword!! It's awesome" <- MATCH 
Sentence: "I like #myword It's awesome" <- NO MATCH

來源

2011-03-21 14:25:42

哇！謝謝彼得:) – LDK 2011-03-21 14:31:00

NP，起初我完全困惑，但是當你清理問題和例子時，它可以解決。 :) – 2011-03-21 14:31:58

這很好：）我怎樣才能添加大小寫不敏感？ – LDK 2011-03-21 15:00:54

這應該做的伎倆（更換任何你想找到在「myWord」）：

^.*#myword[^\w].*$

如果匹配成功，然後你的話被發現 - 否則就不是。

來源

2011-03-21 14:09:50

這種表達是錯誤的:('的preg_match（）：未知的修飾詞 '\'' – LDK 2011-03-21 14:14:00

好的作品對我很好（快報 - .NET）所以你可以用字符替換「\ W」：[AZ] [AZ] [0-9] – 2011-03-21 14:17:44

也許你只是需要跳過斜槓（「\\」而不是「\」，我不知道在PHP中）。 – 2011-03-21 14:18:22

你應該尋找myword像這樣/\bmyword\b/ wordboundary。
#本身也是wordboundary所以/\b#myword\b/這麼想的工作。
一個想法是爲了逃避unicode字符\X但這會產生其他問題。

/ #myword\b/

來源

2011-03-21 14:22:31

此表達式與第三個示例相匹配，但不能爲 – LDK 2011-03-21 14:28:36

@LDK true \ X不是一個好主意來逃避unicode特徵 – 2011-03-21 14:59:24

+1它的工作原理！我錯過了領先的空間，當我嘗試它。 – 2011-03-21 15:56:43

正則表達式：匹配的詞有特殊字符

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