It's not impossible that you are getting the string from the echo, plus a line that is only the carriage return.
If your PHP script has more than one final carriage return avterthe closing "?>", it could be effectively echoing your '1

lease choose another name' followed by a carriage return.
Or, if there is a carriage return before the starting "<?" that could also be adding a line you weren't expecting.
In a PHP script, anything outside of the "<?" or "<?php" and "?>" will be displayed or echoed as a response. This has caused more than one problem for professionals in the field (of which I am one).
Check your PHP script. Also, try doing a message pop-up for each string returned by your script, before you manipulate it, to see what you are actually getting.
Cheers,
Ancient Lady
AGK Community Tester and AppGameKit Master