Check if current user is administrator in wordpress

Question

I am developing a plugin for wordpress, I want to find if current user is administrator or not, unfortunately I could not use the current_user_can() as it gives me error, so am using the global $current_user. But I could not get inside the if part even for admin user.. How to fix this?

global $current_user;
if ($current_user->role[0]=='administrator'){
function hide_post_page_options() {
//global $post;
// Set the display css property to none for add category and add tag functions
$hide_post_options = "<style type=\"text/css\"> .jaxtag { display: none; } #category-adder { display: none; } </style>";
print($hide_post_options);
}
add_action( 'admin_head', 'hide_post_page_options'  );
}

Answer 1

Try something like the following:

if ( current_user_can( 'manage_options' ) ) {     /* A user with admin privileges */ } else {     /* A user without admin privileges */ } 

Read more about the current_user_can function here.

Answer 2

Get the user and check if it has the role adminstrator, like so:

function is_site_admin(){
    return in_array('administrator',  wp_get_current_user()->roles);
}

if (is_site_admin()) {
  echo 'Woot Woot';
} else {
  echo 'So sad, I have no rights';
}

Answer 3

This works for me:

  global $current_user;

  if( !empty($current_user->roles) ){
    foreach ($current_user->roles as $key => $value) {
      if( $value == 'administrator' ){
        Do Something
      }
    }
  }

If it's not a multi-site set-up, you can use this to detect an administrator. If it's multi-site, this will only return true for a super admin.

  $user_ID = get_current_user_id();
  if($user_ID && is_super_admin( $user_id )) {
    Do Something
  }