H. G., Try switching to the Text format. Your HTML will still work, but it will not use CKEditor, and it will not run the functions that undo its formatting.
OK, I tried that, but it makes no difference. I even tried switching JavaScript off during the edit, so that I am sure nothing can be done to the text in the browser client. I replaced the offending < by <, and after I resubmitted the page still has a < at that place (as seen in the Page Source).
The problem must be in the PHP script that processes the submitted form.
OK, I tried that, but it makes no difference. I even tried switching JavaScript off during the edit, so that I am sure nothing can be done to the text in the browser client. I replaced the offending < by <, and after I resubmitted the page still has a < at that place (as seen in the Page Source).
The problem must be in the PHP script that processes the submitted form.