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“查找”命令会不必要地替换文本

tag-icon • tag-icon command-line find sed text-processing
“查找”命令会不必要地替换文本

我正在运行一个 Ubuntu EC2 实例。我经常使用查找和替换来更新和调整所有文件中使用的内容。
但是，当我必须替换PHP代码时，我不可避免地必须替换美元符号，但这对我来说从未成功过。我已经学习并尝试了所有我所知的转义方法。我相信我有一种转义美元符号的方法，它实际上会用所需的文本替换文本，我尝试了替换；结果，我所有包含美元符号的文件（即所有文件）现在都被完全撕裂了，并充满了我试图替换的内容。
我使用的命令是：

find ./ -name \*.php -exec sed -i "s|[\'REQUEST_URI\']|\$_SERVER[\'REQUEST_URI\']|g" {} \;

我不知道为什么会发生这种情况，现在我创建了一年多的网站已经完全被毁了。
影响如下：

<?php
       $sql =
       "$_SERVER['REQUEST_URI']$_SERVER['REQUEST_URI']L$_SERVER['REQUEST_URI']C$_SERVER['REQUEST_URI'] questions.question$_SERVER['REQUEST_URI']title, questions.question$_SERVER['REQUEST_URI']content, questions.question$_SERVER['REQUEST_URI']date, questions.question$_SERVER['REQUEST_URI']answered
       F$_SERVER['REQUEST_URI']OM questions
       WH$_SERVER['REQUEST_URI']$_SERVER['REQUEST_URI']$_SERVER['REQUEST_URI'] questions.question$_SERVER['REQUEST_URI']topic = $topic$_SERVER['REQUEST_URI']D AND questions.question$_SERVER['REQUEST_URI']answered $_SERVER['REQUEST_URI']$_SERVER['REQUEST_URI'] N$_SERVER['REQUEST_URI']LL
       O$_SERVER['REQUEST_URI']D$_SERVER['REQUEST_URI']$_SERVER['REQUEST_URI'] BY questions.question$_SERVER['REQUEST_URI']date D$_SERVER['REQUEST_URI']$_SERVER['REQUEST_URI']C
       L$_SERVER['REQUEST_URI']M$_SERVER['REQUEST_URI']$_SERVER['REQUEST_URI'] 5";

       $result = $conn->query($sql);

       if($result !== N$_SERVER['REQUEST_URI']LL && $result->num$_SERVER['REQUEST_URI']rows > 0)
       while($row = $result->fetch$_SERVER['REQUEST_URI']assoc()) {
       echo "
       <a href=$_SERVER['REQUEST_URI']view$_SERVER['REQUEST_URI']uestion.php?" . $$_SERVER['REQUEST_URI']$_SERVER['REQUEST_URI']$_SERVER['REQUEST_URI']$_SERVER['REQUEST_URI']V$_SERVER['REQUEST_URI']$_SERVER['REQUEST_URI'][$_SERVER['REQUEST_URI']$_SERVER['REQUEST_URI']$_SERVER['REQUEST_URI']$_SERVER['REQUEST_URI']$_SERVER['REQUEST_URI']Y$_SERVER['REQUEST_URI']$_SERVER['REQUEST_URI']$_SERVER['REQUEST_URI']$_SERVER['REQUEST_URI']$_SERVER['REQUEST_URI']NG$_SERVER['REQUEST_URI']] . "&question=" . $row[$_SERVER['REQUEST_URI']question$_SERVER['REQUEST_URI']title$_SERVER['REQUEST_URI']] . "$_SERVER['REQUEST_URI'] class=$_SERVER['REQUEST_URI']questionAnchor$_SERVER['REQUEST_URI']><div id=$_SERVER['REQUEST_URI']unanswered$_SERVER['REQUEST_URI']>
                  <div class=$_SERVER['REQUEST_URI']offset$_SERVER['REQUEST_URI']uestion$_SERVER['REQUEST_URI']>
                  <h4 class=$_SERVER['REQUEST_URI']thumbnail$_SERVER['REQUEST_URI']itle$_SERVER['REQUEST_URI']>" . $row[$_SERVER['REQUEST_URI']question$_SERVER['REQUEST_URI']title$_SERVER['REQUEST_URI']] . "</h4>
                  <div class=$_SERVER['REQUEST_URI']thumbnailDesc$_SERVER['REQUEST_URI']>" . $row[$_SERVER['REQUEST_URI']question$_SERVER['REQUEST_URI']content$_SERVER['REQUEST_URI']] . "</div>
                  </div>
        </div></a>
    ";

答案1

我担心您的网站遭到了严重损坏。

分析您的sed命令：

sed -i "s|[\'REQUEST_URI\']|\$_SERVER[\'REQUEST_URI\']|g"

该命令的效果是将'REQUST_I集合中的任何字符（即每个单个', R, , ...）替换为其找到的每个文件中的E字符串。$_SERVER['REQUEST_URI']find

这是不可逆的，因为任何实例$_SERVER['REQUEST_URI']现在可能对应于集合中的任何字符'REQUST_I。

唯一有点帮助的就是运行一个命令，将$_SERVER['REQUEST_URI']受该命令影响的每个文件中的每个实例替换为单个字符，以提高可读性并减少修复文件的痛苦。

例如将 的每个实例替换$_SERVER['REQUEST_URI']为点（这显然也会替换 的合法实例$_SERVER['REQUEST_URI']）：

sed "s/\$_SERVER\['REQUEST_URI'\]/./g" file

如果我在你的代码片段上运行命令，我会得到以下结果：

<?php
       $sql =
       "..L.C. questions.question.title, questions.question.content, questions.question.date, questions.question.answered
       F.OM questions
       WH... questions.question.topic = $topic.D AND questions.question.answered .. N.LL
       O.D.. BY questions.question.date D..C
       L.M.. 5";

       $result = $conn->query($sql);

       if($result !== N.LL && $result->num.rows > 0)
       while($row = $result->fetch.assoc()) {
       echo "
       <a href=.view.uestion.php?" . $....V..[.....Y.....NG.] . "&question=" . $row[.question.title.] . ". class=.questionAnchor.><div id=.unanswered.>
                  <div class=.offset.uestion.>
                  <h4 class=.thumbnail.itle.>" . $row[.question.title.] . "</h4>
                  <div class=.thumbnailDesc.>" . $row[.question.content.] . "</div>
                  </div>
        </div></a>
    ";

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