水野史土

In a multisite, you can create child sites. When you create a new child site, you fill in the title and the slug. And, you have to fill in your e-mail address, even if you are the network administrator.
If you enter an e-mail by hand, you may mistype. But, you can avoid such a risk. This code, shown below, automatically fill your e-mail address into the corresponding box, with an aid of jquery.

Preset Admin Email for Multisite

hen you create a child site, this plugin automatically fill your e-mail address into the corresponding box, with an aid of jquery.

Daniel Westermann-Clark

By default, WordPress network usernames cannot contain anything but lowercase letters and numbers. This plugin adds network options to let you include hyphens, underscores, or uppercase letters, if desired.
Furthermore, this plugin gives you the option to allow email addresses as usernames, or to allow all-numeric usernames (e.g. “1234”).
Finally, this plugin lets you override the minimum length for usernames (which defaults to four characters).
To follow updates to this plugin, visit:
https://danieltwc.com/
For help with this version, visit:
https://danieltwc.com/2011/network-username-restrictions-override-1-0/

Network Username Restrictions Override

Does what it says!

Override restrictions on WordPress network usernames.

Preset Admin Email for Multisite vs Network Username Restrictions Override