Ecshop member registration prompt "user name already exists", cannot be registered

My ecshop template is displayed on the registration form page. After entering the user name, the system prompts "the user name already exists. Please enter it again". The user name I entered does not exist. Why?

A:

There are several situations:

1. If your ECSHOP mall has been integrated with other programs using UCENTER, it may be that the UCENTER communication is not configured, and the user name cannot pass the detection if it already exists.

2. The problem may be a language pack file, such as/ages/zh_cn/user. php,

Find

* Password strength */

$ _ LANG ['pwd _ lower '] = 'weak ';

$ _ LANG ['pwd _ middle'] = 'zhong ';

$ _ LANG ['pwd _ high'] = 'power ';

$ _ LANG ['User _ reg_info '] [0] = 'register if you are not a member ';

$ _ LANG ['User _ reg_info '] [1] = 'reminder of friendship ';

$ _ LANG ['User _ reg_info '] [2] =' you can buy items in this store if you are not registered as a member ';

$ _ LANG ['User _ reg_info '] [3] =' but after registration, you can ';

$ _ LANG ['User _ reg_info '] [4] = 'save your profile ';

$ _ LANG ['User _ reg_info '] [5] = 'add your favorite item ';

$ _ LANG ['User _ reg_info '] [6] = 'membership point system ';

$ _ LANG ['User _ reg_info '] [7] = 'Subscribe to product information ';

$ _ LANG ['add _ bonus'] = 'add hongba ';

What is the final PHP end symbol in the file?> There is a space behind it. In this case, an error occurs when AJAX is called to check whether the user name exists, prompting that any new user name already exists. The solution is to delete the PHP ending symbol at the end of the user. PHP file.
?>