正則表達式替換字不以某些符號開頭

Question

我可以這樣做嗎？

...blah-blah...AA_word.......blah-blah...AB_word......word........Nword.... 

我需要更換隻字不以「AB_」開始的那些OCCURENCES所以它看起來就像這樣：

...blah-blah...AA_XXXX.......blah-blah...AB_word......XXXX........NXXXX.... 

這可能嗎？我對或多或少熟悉正則表達式，但仍然無法知道如何去做。編程語言並不重要 - PHP，JS或C＃，無論

Answer 1

搜索：XXXX

一個Perl：(?<!AB_)word
，代之以實施：

my $str = "...blah-blah...AA_word.......blah-blah...AB_word......word........Nword...."; 
$str =~ s/(?<!AB_)word/XXXX/g; 
say $str; 

輸出：

...blah-blah...AA_XXXX.......blah-blah...AB_word......XXXX........NXXXX.... 

用PHP：

$str = "...blah-blah...AA_word.......blah-blah...AB_word......word........Nword...."; 
$str = preg_replace('/(?<!AB_)word/', 'XXXX', $str); 
echo "$str\n"; 

Answer 2

在JS：

var s = "...blah-blah...AA_word.......blah-blah...AB_word......word........Nword...." 

s.replace("AB_word", "????").replace(/word/g, "XXXX").replace("????", "AB_word") 
// results in 
// ...blah-blah...AA_XXXX.......blah-blah...AB_word......XXXX........NXXXX.... 

HTH