正則表達式匹配單詞由字符分隔，幷包含由XML標記

Question

我一直在試圖建立一個正則表達式來做到以下幾點：

查找包含在XML標記單詞「字母」，搜索將匹配如下：

<hw>Al"pha*bet</hw> 
<hw>Al"pha*be`t</hw>   
<hw>alphabet</hw>  
<hw>al*pha*bet</hw>   
<hw>al"pha"b"et</hw> 

這個詞可以用3個特殊字符隔開：「*`，搜索就必須有區分大小寫能否請你幫我通過構建一個將專門搜索單詞字母用正則表達式。或者沒有上面提到的任何特殊字符

Answer 1

你可以試試這個

a([`"\*])*l([`"\*])*p([`"\*])*h([`"\*])*a([`"\*])*b([`"\*])*e([`"\*])*t 

或者這

>\s*a([`"\*])*l([`"\*])*p([`"\*])*h([`"\*])*a([`"\*])*b([`"\*])*e([`"\*])*t\s*< 

編輯

對不起忘了逃跑*

Answer 2

一個我得到了你的作品中所列的情況：

/<[a-zA-Z]+>al"*\**pha\**\"*b\"*e`*t<\/[a-zA-Z]+>/i 

結賬http://www.rubular.com/。它有一個正則表達式的實時測試。

Answer 3

這將與正則表達式不應該被用來解析XML/HTML等的告誡工作..

它總是更容易捕捉簡單樣本，然後子進程它們的回調。
在這種情況下，捕獲（[字母「*`，] +），然後去掉不需要的字符，然後做一個比較。

一個Perl示例，其概念與Perl/PHP/C＃等相同。 ..

$sample = ' 
    <hw>Al"pha*bet</hw> 
    <hw>Al"pha*be`t</hw>   
    <hw>alphabet</hw>  
    <hw>al*pha*bet</hw>   
    <hw>al"pha"b"et</hw> 
'; 

$specialword = 'alphabet'; 
$uc_specialword = uc($specialword); 

while ($sample =~ m{<([A-Za-z_:][\w:.-]*)(?:\s+(?:".*?"|\'.*?\'|[^>]*?)+)?\s*(?<!/)>([$specialword"*`,]+)</\1\s*>}isg) 
{ 
    ($matchstr, $checkstr) = ($&, $2); 
    $checkstr =~ s/["*`,]//g; 
    if (uc($checkstr) eq $uc_specialword) { 
     print "Found '$checkstr' in '$matchstr'\n"; 
    } 
} 

擴展正則表達式：

m{ # Regex delim 
<       # Open tag 
    ([A-Za-z_:][\w:.-]*)     # Capture 1, the tag name 
    (?:\s+(?:".*?"|\'.*?\'|[^>]*?)+)?\s* # optional attr/val pairs 
    (?<!/) 
> 
([alphabet"*`,]+)  # Capture 2, class of special characters allowed, 'alphabet' plus "*`, 
</\1\s*>     # Close tag, backref to tag name (group 1) 

}xisg # Regex delim. Options: expanded, case insensitive, single line, global 

輸出：

Found 'Alphabet' in '<hw>Al"pha*bet</hw>' 
Found 'Alphabet' in '<hw>Al"pha*be`t</hw>' 
Found 'alphabet' in '<hw>alphabet</hw>' 
Found 'alphabet' in '<hw>al*pha*bet</hw>' 
Found 'alphabet' in '<hw>al"pha"b"et</hw>' 

PHP示例的

使用preg_match()可以在這裏http://www.ideone.com/8EBpx

<?php 

    $sample = ' 
    <hw>Al"pha*bet</hw> 
    <hw>Al"pha*be`t</hw>   
    <hw>alphabet</hw>  
    <hw>al*pha*bet</hw>   
    <hw>al"pha"b"et</hw> 
    '; 

    $specialword = 'alphabet'; 
    $uc_specialword = strtoupper($specialword); 
    $regex = '~<([A-Za-z_:][\w:.-]*)(?:\s+(?:".*?"|\'.*?\'|[^>]*?)+)?\s*(?<!/)>([' . $specialword. '"*`,]+)</\1\s*>~xis'; 
    $pos = 0; 

    while (preg_match($regex, $sample, $matches, PREG_OFFSET_CAPTURE, $pos)) 
    { 
    $matchstr = $matches[0][0]; 
    $checkstr = $matches[2][0]; 

    $checkstr = preg_replace('/[" * `,]/', "", $checkstr); 
    if (strtoupper($checkstr) == $uc_specialword) 
     print "Found '$checkstr' in '$matchstr'\n"; 

    $pos = $matches[0][1] + strlen($matchstr); 
    } 

?> 

使用preg_match_all()發現可以在這裏找到http://www.ideone.com/C6HeT

<?php 

    $sample = ' 
    <hw>Al"pha*bet</hw> 
    <hw>Al"pha*be`t</hw>   
    <hw>alphabet</hw>  
    <hw>al*pha*bet</hw>   
    <hw>al"pha"b"et</hw> 
    '; 

    $specialword = 'alphabet'; 
    $uc_specialword = strtoupper($specialword); 
    $regex = '~<([A-Za-z_:][\w:.-]*)(?:\s+(?:".*?"|\'.*?\'|[^>]*?)+)?\s*(?<!/)>([' . $specialword. '"*`,]+)</\1\s*>~xis'; 

    preg_match_all($regex, $sample, $matches, PREG_SET_ORDER); 

    foreach ($matches as $match) 
    { 
    $matchstr = $match[0]; 
    $checkstr = $match[2]; 

    $checkstr = preg_replace('/[" * `,]/', "", $checkstr); 
    if (strtoupper($checkstr) == $uc_specialword) 
     print "Found '$checkstr' in '$matchstr'\n"; 
    } 

?>