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How can i retrieve the author id if i have its name.

I have fornt end form any user can enter the author name to filter the posts by author name so after that how can i get author id. Or there is any other way to write the query so that it return the posts which is posted by specific authors. Thanks

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get_user_by will get you the user data by 'id', 'slug', 'email', or 'login'.

'slug' is the user_nicename.

$user = get_user_by('slug','nicename');

However, I am not sure what you mean by 'name'. There are other plausible 'name' fields, not all of them required. There is the display_name for example.

To search fields like user_nicename you will need to create a new WP_User_Query.

$args= array(
  'search' => 'Display Name',
$user = new WP_User_Query($args);

The default columns searched appear to be based on the type of data in the search field but you can restrict to particular fields by using the search_fields parameter.

$args= array(
  'search' => 'Display Name', // or login or nicename in this example
  'search_fields' => array('user_login','user_nicename','display_name')
$user = new WP_User_Query($args);
share|improve this answer
Yes here [name] means [display_name]. Basically i get the author [display_name] from user and on the bases of that [dis_play] name i show the posts the posts. > $user = get_user_by('slug', 'nicename'); Can i put the [display_name] instead of [nicename] here? – Adi Mar 8 '13 at 18:51

How about get_user_by function?

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