Function and usage of get_user_by_email() in wordpress

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    2024-01-08T15:19:50+00:00

    The get_user_by_email() function in WordPress is designed to retrieve user information based on an email address. This function is particularly useful when you need to get details about a user, and all you have is their email. Here's a detailed explanation of its function and usage:

    Function:

    • Name: get_user_by_email()

    Description:

    • This function retrieves user information from the WordPress database by using the user's email address as the key.
    • It's important to note that this function is a part of the WordPress user API, which interacts with the user database.

    Parameters:

    • $email (string, required): This parameter should be the email address of the user you're looking to retrieve information for. The email address must be a valid and registered one in the WordPress user database.

    Return:

    • bool|object: The return value of this function can be either a boolean or an object.
      • If the function fails to find a user with the given email address, it returns false.
      • On success, it returns a User DB row object. This object contains various pieces of user information like the user's ID, username, email, and any other information stored in the user's database row.

    Sample Usage:

    Here's an example of how you might use get_user_by_email() in a WordPress plugin or theme:

    $email = 'user@example.com'; // User's email address
    $user = get_user_by_email($email);
    
    if ($user) {
        // Success: $user is an object containing user details
        echo 'User ID: ' . $user->ID;
        echo 'Username: ' . $user->user_login;
        // ...other user details...
    } else {
        // Failure: No user found with that email address
        echo 'No user found with the email ' . $email;
    }
    

    In this example, $email should be replaced with the actual email address of the user you are trying to retrieve. The function will then check if a user with that email exists in the database. If it does, it returns an object containing the user's details, which you can access as shown. If not, it returns false, and the script can handle this case accordingly.

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