I have a line I want to replace such as

'baseurl' => 'https://231.231.231.231'

But I only want it to replace the https://231.231.231.231 part.

Basically I want it to be

'baseurl' => 'myvaluehere'

I have tried sudo sed -i "s|'baseurl'|${value1}|g" file.php

How do I replace after certain characters after 'baseurl' is matched?

CodePudding user response：

Using sed

$ sed -E "/(baseurl'[^']*')[^']*/s//\1myvaluehere/" input_file
'baseurl' => 'myvaluehere'

CodePudding user response：

Here is the way you can achieve it:

1. find the match
2. exclude it
3. find the next pattern and replace it

And here is a perl version since have not used sed so much:

perl -lpe "s/'baseurl' => \K'http[^ ] /'XYZ'/g" <<< "'baseurl' => 'https://231.231.231.231'"
'baseurl' => 'XYZ'

• 'baseurl' => \ find the match
• \K exclude it (= ignore it for substitution)
• 'http[^ ] match this part and replace it -- the assumption is that there is no space in the url
• 'XYZ'
• <<< is a bash feature and means String Here which provides input for perl , or:
  • echo "string" | perl -lpe ..., also can be
  • perl -lne ... file.txt

Since we use double quotes " in perl we can use variables as well:

VAR=XXYYZZ
perl -lpe "s/'baseurl' => \K'http[^ ] /$VAR'/g" <<< "'baseurl' => 'https://231.231.231.231'"
'baseurl' => XXYYZZ'