使用 sed 替换变量名及其值 [英] Using sed to replace variable name and its value

问题描述

在许多 PHP 文件中，我已经像这样定义了变量 $_PATHROOT

In many PHP files I have defined the variable $_PATHROOT like this

$_PATHROOT = '../../../../';

我想用 define() 替换它:

define('_PATHROOT', '../../../../');

当然，../../../../的值因文件而异.

Of course, the value ../../../../ differs from one file to another.

linux sed 命令行可以吗?

Would it be possible with linux sed command line?

谢谢.

推荐答案

绝对有可能.

以下命令适用于任何脚本(它适用于我的测试文件):

The following command should work for any script (it worked for me on a test file):

sed -ri "s/^[$]_PATHROOT = '(([.][.]\/)+)';$/define('_PATHROOT', '\1');/"文件路径

用要编辑的文件的路径替换 FILEPATH 的位置.

where you replace FILEPATH with the path of the file to be edited.

此命令假定您要更改的行正好是

This command assumes that the line you want to change is exactly

$_PATHROOT = '../../';

除了可能有任何正数的../".空格中的任何变化都会使其失效，因此如果不同文件之间存在差异，您需要对其进行修改.

except that there may be any positive number of "../"s. Any variations in whitespace will throw it off, so if that varies across files you'll need to modify it.

感谢 Kent 使用 [$] 而不是一堆反斜杠的想法，因为 $ 在 bash 和 sed 中都有特殊含义.

Credit to Kent for the idea of using [$] instead of a mess of backslashes as $ has special meaning in both bash and sed.

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