使用 Perl 在文件中搜索和替换具有特殊字符的字符串

Question

Search and replace a string in a file using Perl. I have a .txt file. where i need to search and replace a string. i code i have is working fine for string not having special characters.but for the string containing special characters like (?,=,:: ) is not working with this code.

Problem statement image

Code i am using and expected results

Answer 1

Use Perl's built-in function quotemeta to escape all special characters in your search string. See https://perldoc.perl.org/functions/quotemeta.html