搜索和替换Linux

Question

I am trying to do the following search and replace, but for some reason it's not working. I am trying to replace:

require_once('

with

require_once($_SERVER['DOCUMENT_ROOT']/'

Those are the exact srings (slash and single quote included).

This is what I attempted, however I can't get it to work:

find ./ -type f -readable -writable -exec sed -i "s/require_once(\'/require_once($_SERVER['DOCUMENT_ROOT'] . \'\//g" {} \;

What am I doing wrong??

Answer 1

你需要转义$和/字符：

sed "s/require_once('/require_once(\$_SERVER['DOCUMENT_ROOT']\/'/g"

Answer 2

你需要反斜杠 - 在双引号内转义美元符号，否则shell会插入（不存在的）环境变量_SERVER ，用空字符串替换它。