Search by custom profile fields?

Question

PHP

Faced a problem. Added custom field to user profile. I want to display a list of users whose birthday is today (please do not offer ready-made plugins, because I am writing a plugin for e-mail notifications with coupon generation for woo).
Tried to use instead of date *, does not display anything.
Search code (which doesn't work):

$blogusers = get_users_by('birthday','search=17.02.2016');
  foreach ($blogusers as $user) {
    echo '<li>' . $user->user_email . ' ('.$user->birthday.')</li>';
  }

Add code to user profile:

<p class="form-row form-row-wide">
        <label for="birthday">Дата рождения</label>
        <input type="text" class="input-text" name="birthday" id="datepicker" value="<?php echo esc_attr( $user->birthday ); ?>" />
    </p>

Code in functions.php

add_action( 'woocommerce_save_account_details', 'my_save_account', 10, 2 ); 
function my_save_account($user_id) {
  $birthday  = ! empty( $_POST[ 'birthday' ] ) ? $_POST[ 'birthday' ] : '';
  update_user_meta($user_id, 'birthday', $birthday);

  $about_myself  = ! empty( $_POST[ 'about_myself' ] ) ? $_POST[ 'about_myself' ] : '';
  update_user_meta($user_id, 'about_myself', $about_myself);
}

Answer 1

And where did you get the idea that such a code should work at all?

$blogusers = get_users_by('birthday','search=17.02.2016');

You need to look at WP_User_Query https://codex.wordpress.org/Class_Reference/WP_Use...
Here is a sample code:

$user_query = new WP_User_Query( array( 'meta_key' => 'country', 'meta_value' => 'Israel' ) );