[wp-trac] [WordPress Trac] #15729: Better UX after supplying incorrect information to setup-config

[WordPress Trac]

#15729: Better UX after supplying incorrect information to setup-config
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 Reporter:  nacin            |       Owner:                 
     Type:  defect (bug)     |      Status:  new            
 Priority:  low              |   Milestone:  Future Release 
Component:  Upgrade/Install  |     Version:                 
 Severity:  normal           |    Keywords:  gci needs-patch
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 In #15682 I added a 'Try Again' button to step 2 of setup-config.php if
 the credentials were incorrect.

 The button is a simple link with a `javascript:history.go(-1)` hack. This
 should instead be a form with hidden values that submits back to setup-
 config.php?step=1, and fills out the form so they can try again.

 Additional enhancement: If the prefix is malformed (can only contain
 letters, numbers and underscores), we do a wp_die(). We should again have
 a form with a 'Try Again' button that returns them.

 As an added bonus, incorrect credentials should be filled out (for
 reference) but marked as incorrect and potentially with the focus set on
 that field.

 Only caveat I can think of: This will require the use of esc_attr(), which
 we don't have access to yet. Not sure how to solve that without reverting
 to htmlspecialchars() with some extra work.

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Ticket URL: <http://core.trac.wordpress.org/ticket/15729>
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