Tak som teda hodil celý kód do jedného "online checker-u". Ten vypísal tieto chyby:

PHP Notice:  Undefined index: nickname in /home/cg/root/7710831/main.php on line 73
PHP Notice:  Undefined index: pwd1 in /home/cg/root/7710831/main.php on line 74
PHP Notice:  Undefined index: pwd2 in /home/cg/root/7710831/main.php on line 75
PHP Notice:  Undefined index: email in /home/cg/root/7710831/main.php on line 76
PHP Notice:  Undefined index: rok in /home/cg/root/7710831/main.php on line 77
PHP Notice:  Undefined index: submitForm in /home/cg/root/7710831/main.php on line 78
PHP Notice:  Undefined variable: mysqli in /home/cg/root/7710831/main.php on line 79
PHP Notice:  Undefined index: nickname in /home/cg/root/7710831/main.php on line 79
PHP Warning:  mysqli_query() expects parameter 1 to be mysqli, null given in /home/cg/root/7710831/main.php on line 79
PHP Notice:  Undefined variable: mysqli in /home/cg/root/7710831/main.php on line 80
PHP Notice:  Undefined index: email in /home/cg/root/7710831/main.php on line 80
PHP Warning:  mysqli_query() expects parameter 1 to be mysqli, null given in /home/cg/root/7710831/main.php on line 80

Nič viac. A STÁLE NECHÁPEM, PREČO MI NEUKAZUJE SPRÁVNY TEXT, KTORÝ UKAZOVAŤ MÁ (Uživ. už existuje... atď...)