谁帮我写一个正则。匹配源码中的字符串的。

Question

我是为了用正则替换源码中的一些单词，但不能将字符串里的内容也替换了。举个例子，比如以下，如果要将$i=5替换成$j=8
<?php
if($i=5) echo '$i=5';
?>
替换成
<?php
if($j=8) echo '$i=5';
?>

Answer 1

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?:"[^"\\]*(?:\\.[^"\\]*)*"|'[^'\\]*(?:\\.[^'\\]*)*')))*)*))
(?:\s+(.*))?$~xs

Answer 2

smarty编译时用的就是正则，不过实在太长了……象上面的就是他一条正则的一小半，csdn做了长度限制，一个帖发不完smarty的一个正则……郁闷。

Answer 3

我看了一下，smarty的这条正则有十几k。谁要是看得懂10k长的正则的话……

Answer 4

preg_replace('/(?<!:\')\$i\=5(?!\')/isU','\$j=8',$str);

Answer 5

preg_replace('/(?<!\')\$i\=5(?!\')/isU','\$j=8',$str);

Answer 6

我已经把这个正则写出来了。zero你写的太简单啦^^b。我要的是通用。当
if($i=5) echo "aafwf$i=5aoooo";
你的就不行了，还是把字符串里的给替换了吧。我要的是内容无限制，只要在字符串里的就不能替换。