Need to replace substring from string ignoring case

Question

Please find below code

String str = 'Hi {!Contact.FirstName} your phone number is {!Contact.Phone}';

I want to replace the string as follow

String str = 'Hi {!contact.firstName} your phone number is {!contact.phone}';

String is not fix so I can't put hard coded value in the replace and replaceAll functions

Please help .

Answer 1

First convert your string to lower cap with the below code

str = str.toLowerCase();

then replace the string

str.replace('{!contact.Firstname}' , 'Ranjit')