function am2_tv_show_usermeta_fields($user) {
?>
    <h3>Promotor information</h3>
    <table class="form-table">
        <tr>
            <th><label for="am2_promotor_type">Type</label></th>
            <td>
                <?php
                    $selected_option = get_the_author_meta( 'am2_promotor_type', $user->ID );
                 ?>
                <select name="am2_promotor_type" id="am2_promotor_type">
                    <option selected value="">Please select something...</option>
                    <option value="basic" <?php if($selected_option == 'basic'){ echo 'selected'; } ?> >Basic</option>
                    <option value="featured" <?php if($selected_option == 'featured'){ echo 'selected'; } ?> >Featured</option>
                    <option value="premium" <?php if($selected_option == 'premium'){ echo 'selected'; } ?> >Premium</option>
                </select>
                <span class="description">Please select promotor type.</span>
            </td>
        </tr>
</table>
<?php
}

function am2_tv_update_usermeta_fields( $user_id ) {

    if ( !current_user_can( 'administrator', $user_id ) ){
        return false;
    }

    update_usermeta( $user_id, 'am2_promotor_type', $_POST['am2_promotor_type'] );
}


add_action( 'show_user_profile', 'am2_tv_show_usermeta_fields', 10, 2 );
add_action( 'personal_options_update', 'am2_tv_update_usermeta_fields', 10, 2 );
add_action( 'edit_user_profile_update', 'am2_tv_update_usermeta_fields', 10, 2 );
add_action( 'edit_user_profile', 'am2_tv_show_usermeta_fields', 10, 2 );

 Source

$customPosts = new WP_Query($yourArgs);
echo "Last SQL-Query: {$customPosts->request}";

OR

First, put this in wp-config.php:

define( 'SAVEQUERIES', true );

Then in the footer of your theme put this:

<?php
if ( current_user_can( 'administrator' ) ) {
    global $wpdb;
    echo "<pre>";
    print_r( $wpdb->queries );
    echo "</pre>";
}
?>

Source

function am2_cities_tax_create() {
    // this will add the custom meta field to the add new term page
    ?>
    <div class="form-field">
        <label for="term_meta[time_zone]">Time Zone</label>
        <input type="text" name="term_meta[time_zone]" id="term_meta[time_zone]" value="">
        <p class="description">If unusure, please check <a href="http://www.timeanddate.com/worldclock/">here.</a></p>
    </div>

<?php
}
add_action( 'cities_add_form_fields', 'am2_cities_tax_create', 10, 2 );


function am2_cities_tax_update($term) {
    // this will add the custom meta field to the update term page
    // put the term ID into a variable
    $t_id = $term->term_id;

    // retrieve the existing value(s) for this meta field. This returns an array
    $term_meta = get_option( "taxonomy_$t_id" );
    ?>
    <tr class="form-field">
        <th scope="row" valign="top"><label for="term_meta[time_zone]">Time Zone</label></th>
        <td>
            <input type="text" name="term_meta[time_zone]" id="term_meta[time_zone]" value="<?php echo esc_attr( $term_meta['time_zone'] ) ? esc_attr( $term_meta['time_zone'] ) : ''; ?>">
            <p class="description">If unusure, please check <a href="http://www.timeanddate.com/worldclock/">here.</a></p>
        </td>
    </tr>
<?php
}

add_action( 'cities_edit_form_fields', 'am2_cities_tax_update', 10, 2 );

function am2_cities_tax_custom_meta_save( $term_id ) {
    if ( isset( $_POST['term_meta'] ) ) {
        $t_id = $term_id;
        $term_meta = get_option( "taxonomy_$t_id" );
        $cat_keys = array_keys( $_POST['term_meta'] );
        foreach ( $cat_keys as $key ) {
            if ( isset ( $_POST['term_meta'][$key] ) ) {
                $term_meta[$key] = $_POST['term_meta'][$key];
            }
        }
        // Save the option array.
        update_option( "taxonomy_$t_id", $term_meta );
    }
}
add_action( 'edited_cities', 'am2_cities_tax_custom_meta_save', 10, 2 );
add_action( 'create_cities', 'am2_cities_tax_custom_meta_save', 10, 2 );

Treba korigirati wp-config.php

define('WP_POST_REVISIONS', false ); // disable post revisions
define('WP_POST_REVISIONS', 3); // alter number of post revisions kept.

 Documentation

$from_email = 'mailer@server.com';
$to_email = $seller->user_email;
$headers = "From: FROM NAME <$from_email>" . "\r\n";
$msg = "Ovo je poruka sa WP servera";
$subject = "WP mail subject";
$attachments = 'neki_file';
wp_mail($to_email, $subject, $msg, $headers, $attachments);

This launches the command $cmd, redirects the command output to $outputfile, and writes the process id to $pidfile.

exec(sprintf("%s > %s 2>&1 & echo $! >> %s", $cmd, $outputfile, $pidfile));

This lets you easily monitor what the process is doing and if it’s still running.

function isRunning($pid){
    try{
        $result = shell_exec(sprintf("ps %d", $pid));
        if( count(preg_split("/\n/", $result)) > 2){
            return true;
        }
    }catch(Exception $e){}

    return false;
}

 Source

Manual:

exec

proc_open

$user_id = (is_user_logged_in() && 
!empty($current_user)) ? $current_user->ID : '';
		
if(empty($user_id)){	
  $current_user = wp_get_current_user();
  if($current_user instanceof WP_User){
    $user_id = $current_user->ID;
  }
}

/**
 * Checks if a particular user has a role. 
 * Returns true if a match was found.
 *
 * @param string $role Role name.
 * @param int $user_id (Optional) The ID of a user. Defaults to the current user.
 * @return bool
 */
function appthemes_check_user_role( $role, $user_id = null ) {

    if ( is_numeric( $user_id ) )
	$user = get_userdata( $user_id );
    else
        $user = wp_get_current_user();

    if ( empty( $user ) )
	return false;

    return in_array( $role, (array) $user->roles );
}

// example use for the current user
if ( appthemes_check_user_role( 'customer' )
    _e( "You've got access dude!", 'appthemes' );
else
    _e( "Sorry man, no luck.", 'appthemes' );

// example use for a specific user
$user_id = 23;

if ( appthemes_check_user_role( 'customer', $user_id )
    _e( "You've got access dude!", 'appthemes' );
else
    _e( "Sorry man, no luck.", 'appthemes' );

$path = $_SERVER['DOCUMENT_ROOT'];
include_once $path . 'wp-load.php';