I have found a great tutorial here that have helped me to developing a custom user search. This is my solution:
<?php
/*
Plugin Name: Simple User Listing
Description: Create a simple shortcode to list our WordPress users.
Author: Damiano Fossa
Version: 1.6.3
*/
function sul_user_listing($atts, $content = null) {
global $post;
global $wpdb;
extract(shortcode_atts(array(
"role" => 'tecnico',
"number" => '10'
), $atts));
$role = sanitize_text_field($role);
$number = sanitize_text_field($number);
// We're outputting a lot of HTML, and the easiest way
// to do it is with output buffering from PHP.
ob_start();
// Get the Search Term
$search = ( isset($_GET["as"]) ) ? sanitize_text_field($_GET["as"]) : false ;
// Get Query Var for pagination. This already exists in WordPress
$page = (get_query_var('paged')) ? get_query_var('paged') : 1;
// Calculate the offset (i.e. how many users we should skip)
$offset = ($page - 1) * $number;
if ($search) {
$my_users = new WP_User_Query(
array(
'role' => 'tecnico',
'search' => '*' . $search . '*',
'search_columns' => array(
'user_login',
'user_nicename',
'user_email',
'user_url',
'display_name'
)
)
);
} else {
// Generate the query
$my_users = new WP_User_Query(
array(
'role' => 'asdlol'
)
);
}
// Get the total number of authors. Based on this, offset and number
// per page, we'll generate our pagination.
$total_authors = $my_users->total_users;
// Calculate the total number of pages for the pagination
$total_pages = intval($total_authors / $number) + 1;
// The authors object.
$authors = $my_users->get_results();
?>
<style>
.advance-search .real-btn {
margin: 0;
}
</style>
<section class="advance-search ">
<form method="get" id="sul-searchform" class="advance-search-form clearfix" action="<?php the_permalink() ?>">
<div class="option-bar small">
<input type="text" class="field" name="as" id="sul-s" placeholder="Cerca tecnico" />
</div>
<div class="option-bar">
<input type="submit" name="submit" class=" real-btn btn" id="sul-searchsubmit" value="Cerca" />
</div>
</form>
<?php
if($search) { ?>
<h2>Ricerca: <em><?php echo $search; ?></em></h2>
<!--<a href="https://wordpress.stackexchange.com/questions/180773/<?php the_permalink(); ?>">Back To Author Listing</a>-->
<?php } ?>
</section><!-- .author-search -->
<?php if (!empty($authors)) { ?>
<ul class="author-list">
<?php
// loop through each author
foreach($authors as $author) {
$author_info = get_userdata($author->ID);
?>
<li>
<?php if(!empty($author->pie_profile_pic_5)): ?>
<img width="130" height="130" src="<?php echo $author->pie_profile_pic_5; ?>"
class="attachment-agent-image wp-post-image" alt="<?php echo $author->first_name; ?> <?php echo $author->last_name; ?>">
<h2 style="display: inline; margin-left: 20px;">
<a href="<?php echo get_author_posts_url($author->ID); ?>"><?php echo $author->first_name; ?> <?php echo $author->last_name; ?></a>
- <?php echo count_user_posts( $author->ID ); ?> immobili
</h2>
<?php else: ?>
<h2 style="display: inline;">
<a href="<?php echo get_author_posts_url($author->ID); ?>"><?php echo $author->first_name; ?> <?php echo $author->last_name; ?></a>
- <?php echo count_user_posts($author->ID, "property"); ?> immobili
</h2>
<?php endif; ?>
<p><?php //echo $author_info->description; ?></p>
<?php $latest_post = new WP_Query( "author=$author->ID&post_count=1" );
if (!empty($latest_post->post)){ ?>
<p><strong>Latest Article:</strong>
<a href="<?php echo get_permalink($latest_post->post->ID) ?>">
<?php echo get_the_title($latest_post->post->ID) ;?>
</a></p>
<?php } //endif ?>
<!--<p><a href="<?php echo get_author_posts_url($author->ID); ?> ">Maggiori informazioni.. <?php //echo $author_info->display_name; ?></a></p>-->
</li>
<?php } ?>
</ul> <!-- .author-list -->
<?php } else {
if(!empty($search)){
$query = $wpdb->prepare("SELECT DISTINCT user_id
FROM wp_usermeta
WHERE meta_key = 'pie_address_3' AND meta_value LIKE '%s'", "%" . $search . "%");
$ids = $wpdb->get_results($query); ?>
<ul class="author-list">
<?php
foreach ($ids as $id) { ?>
<li>
<?php if(!empty(get_user_meta($id->user_id, "pie_profile_pic_5", true))): ?>
<img width="90" height="90" src="<?php echo get_user_meta($id->user_id, "pie_profile_pic_5", true); ?>"
class="attachment-agent-image wp-post-image">
<?php endif; ?>
<h2 style="display: inline; margin-left: 20px;">
<a href="<?php echo get_author_posts_url($id->user_id); ?>">
<?php if(!empty(get_the_author_meta("first_name", $id->user_id))): ?>
<?php echo get_the_author_meta('first_name', $id->user_id); ?>
<?php endif; ?>
<?php if(!empty(get_the_author_meta("last_name", $id->user_id))): ?>
<?php echo get_the_author_meta('last_name', $id->user_id); ?>
<?php endif; ?>
</a>
- <?php echo count_user_posts($id->user_id); ?> immobili
</h2>
</li>
<?php } ?>
</ul>
<?php } ?>
<!--<h2>Nessun tecnico trovato</h2>-->
<? } //endif ?>
<nav id="nav-single" style="clear:both; float:none; margin-top:20px;">
<!--<h3 class="assistive-text">Post navigation</h3>-->
<?php if ($page != 1) { ?>
<span class="nav-previous"><a rel="prev" href="<?php the_permalink() ?>page/<?php echo $page - 1; ?>/"><span class="meta-nav">←</span> Previous</a></span>
<?php } ?>
<?php if ($page < $total_pages ) { ?>
<span class="nav-next"><a rel="next" href="<?php the_permalink() ?>page/<?php echo $page + 1; ?>/">Next <span class="meta-nav">→</span></a></span>
<?php } ?>
</nav>
<?php
// Output the content.
$output = ob_get_contents();
ob_end_clean();
// Return only if we're inside a page. This won't list anything on a post or archive page.
if (is_page()) return $output;
}
// Add the shortcode to WordPress.
add_shortcode('userlisting', 'sul_user_listing');
?>