谁帮我写一个正则。匹配源码中的字符串的。

[Gdj]

//test.php
<?
$str1="abcd";
$str2="ab\"cd";
$str3="ab\'cd";
$str4="\\\r\n\\\\\\\\";
$str5="\$";
?>

$buf=file_get_contents("test.php");
希望从$buf中匹配出所有字符串。要考虑到字符串中的各种转义符。

[Gdj]

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';
?>

[xuzuning]

不要用正则处理正则不能处理的事情
其实只要写个函数逐个字符判断读取就可以了。并且速度要高于使用正则

[Gdj]

可是如果我要做一个复杂替换的话，逐个字符比较自己写替换算法太痛苦了。

[Gdj]

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

[Gdj]

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。

[Gdj]

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……

[颓废的老猫]

这么长的正则，恐怖！

[zeroleonhart]

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

[zeroleonhart]

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

[Gdj]

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。