Wir*_*102 2 javascript php regex
我需要匹配并替换一些评论.例如:
$test = "the url is http://www.google.com";// comment "<-- that quote needs to be matched
我希望匹配引号之外的注释,并用"注释替换注释中的任何注释".
我已经尝试了许多模式和不同的运行方式,但没有运气.
正则表达式将使用javascript运行以匹配php"//"注释
更新:我从下面的borkweb拿了正则表达式并修改它.使用了http://ejohn.org/blog/search-and-dont-replace/中的一个函数,得出了这个:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<script type="text/javascript">
function t_replace(data){
var q = {}, ret = "";
data.replace(/(?:((["'\/]*(("[^"]*")|('[^']*'))?[\s]*)?[\/\/|#][^"|^']*))/g, function(value){
q[key] = value;
});
for ( var key in q ){
ret = q[key];
}
var text = data.split(ret);
var out = ret + text[1];
out = out.replace(/"/g,""");
out = out.replace(/'/g,"'");
return text[0] + out;
}
</script>
</head>
<body>
<script type="text/javascript">
document.write(t_replace("$test = \"the url is http://www.google.com\";// c'o\"mment \"\"\"<-- that quote needs to be matched")+"<br>");
document.write(t_replace("$test = 'the url is http://www.google.com';# c'o\"mment \"\"\"<-- that quote needs to be matched"));
</script>
</body>
</html>
它处理单引号或双引号之外的所有行注释.无论如何我可以优化这个功能吗？
更新2:它不处理此字符串
document.write(t_replace("$test //= \"the url is http://www.google.com\"; //c'o\"mment \"\"\"<-- that quote needs to be matched")+"<br>");
Tha*_*hai 12
您可以使用正则表达式同时匹配所有字符串和注释.如果它是一个字符串,您可以将其替换为自身,不更改,然后处理特殊情况以进行注释.
我想出了这个正则表达式:
"(\\[\s\S]|[^"])*"|'(\\[\s\S]|[^'])*'|(\/\/.*|\/\*[\s\S]*?\*\/)
共有3个部分:
"(\\[\s\S]|[^"])*" 用于匹配双引号字符串.'(\\[\s\S]|[^'])*' 用于匹配单引号字符串.(\/\/.*|\/\*[\s\S]*?\*\/) 用于匹配单行和多行注释.replace函数检查匹配的字符串是否为注释.如果不是,请不要更换.如果是,请更换"和'.
function t_replace(data){
var re = /"(\\[\s\S]|[^"])*"|'(\\[\s\S]|[^'])*'|(\/\/.*|\/\*[\s\S]*?\*\/)/g;
return data.replace(re, function(all, strDouble, strSingle, comment) {
if (comment) {
return all.replace(/"/g, '"').replace(/'/g, ''');
}
return all;
});
}
测试运行:
Input: $test = "the url is http://www.google.com";// c'o"mment """<-- that quote needs to be matched
Output: $test = "the url is http://www.google.com";// c'o"mment """<-- that quote needs to be matched
Input: $test = 'the url is http://www.google.com';# c'o"mment """<-- that quote needs to be matched
Output: $test = 'the url is http://www.google.com';# c'o"mment """<-- that quote needs to be matched
Input: $test //= "the url is http://www.google.com"; //c'o"mment """<-- that quote needs to be matched
Output: $test //= "the url is http://www.google.com"; //c'o"mment """<-- that quote needs to be matched