February 12, 2011 
Definition:
function wp_login($username, $password, $deprecated = '') {}
Checks a users login information and logs them in if it checks out. This function is deprecated.
Use the global $error to get the reason why the login failed. If the username is blank, no error will be set, so assume blank username on that case.
Parameters
- string $username: User’s username
- string $password: User’s password
- bool $deprecated: Not used
Return values
returns:False on login failure, true on successful check
Source code
function wp_login($username, $password, $deprecated = '') {
_deprecated_function( __FUNCTION__, '2.5', 'wp_signon()' );
global $error;
$user = wp_authenticate($username, $password);
if ( ! is_wp_error($user) )
return true;
$error = $user->get_error_message();
return false;
}
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