Problem replacing part of a string

Hi, I have a PHP routine that writes to a text file. An example output line would be: fputs($fp, $form["notify_1"] . "\n"); Where $form["notify_1"] is an array of form variables passed to it. What I wish to do is prior to writing to the text file, I want to search and replace all ')' with '}' and all '(' with '{'. I did the following change to the line of code above and wrote the following function: fputs($fp, txt_change($form["notify_5"]) . "\n"); function txt_change($txt_string) { $prt_string = str_replace("(", "{", $txt_string); $prt_string = str_replace(")", "}", $txt_string); return $prt_string; } My problem is that the search and replace is NOT working. According to the manual, my syntax for "str_replace" is correct. Does anyone have an idea? Thanks, Don