WordPress support from our community
This topic contains 3 replies, has 3 voices, and was last updated by Eric Lewis 3 years ago.
Every result I found in a Google search led to a Forum topic with many comments, but no actual answers and then the topic got closed!
May I ask, Ron, what brings you to ask the question?
I’ve been witnessing problems with people being able to register, so I want to highlight what they should and should not try to enter for a user name. Margarete just told me that WordPress Multisite has some different rules.
You’re right, they are different for single site vs. multisite.
Single site allows alphanumeric characters, _, space, ., -, and @ in usernames. Usernames are limited to 60 characters.
Multisite allows only alphanumeric characters. Usernames must be at least 4 characters, and less than 60. Usernames cannot be in the “illegal names” list (www, web, root, etc.)
Jeremy’s comment here has some lower-level detail.
We hope to remove some of these differences in 4.6 (see #17904).
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