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WPMU Functions/get user id from string

Contents

Description

Returns the user ID of the user specified by either username or registered email address.

Parameters

$string
(string) (required) String representation of the user to lookup the ID of. May be either the user's log in (their username), or the email address registered in WordPress.
Default: None

Return Values

(integer) 
ID of the user specified by $string on success, null if no user is found.

Usage

<?php get_user_id_from_string( 'user@example.com' ); ?>

Examples

<?php
  $useremail = 'user@example.com';
  $userid = get_user_id_from_string( $useremail );
  if ($userid !== null) {
    echo 'User '.$useremail.' has the user ID of '.$userid;
  } else {
    echo 'User '.$useremail.' not found.';
  }
?>

Retrieved from "http://codex.wordpress.org/WPMU_Functions/get_user_id_from_string"

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