Manual:$wgMinimalPasswordLength

User accounts, authentication: $wgMinimalPasswordLength
Specifies the minimal length of a user password.
Introduced in version:1.5.0 (r7317)
Deprecated in version:1.26.0 (Gerrit change 206156; git #1a20dc)
Removed in version:1.42.0 (Gerrit change 995047; git #2d66025f)
Allowed values:(nonnegative integer)
Default value:8 (1.40+)

1 (1.16-1.39)

0 (1.5-1.15)

Details edit

Specifies the minimal length of a user password. If you change this value, users with a password shorter than your new $wgMinimalPasswordLength, have to change their password the next time they log in. If set to 0, empty passwords are allowed.

Since 1.26 deprecated in favor of $wgPasswordPolicy .

See also edit