Inparticular I’m talking about optimising PHP code, rather than, say, HTML code which would improve a users experience. Version Description; 5.0.0: The count parameter was added. str_replace & str_replace_all Functions in R (2 Examples) In this post you’ll learn how to replace matched patterns in character strings with the str_replace and str_replace_all functions in the R programming language. below is a simple example code snippet which shows you how to do it: $second_encode, $haystack); $haystack = str_replace (array( $first_encode , $second_encode ), array( '