How to add CSS in WordPress? IT NEW CODE

Sometimes need to put CSS for WordPress Admin panel but we can't put it in its core files because when ever new updates comes in WordPress Version & update it to new Version our applied CSS will be lost.
In WordPress when update it to new version new files are override to existing files.
So we need to create a function for css which describes below.

Add Following code in your Theme folder "functions.php" file.


add_action('admin_head', 'my_custom_css');

function my_custom_css() {
      echo '<style>
      <!-- Put Your CSS Here -->
      #wpfooter {
           display: none;
         }
       </style>';
}

Its Done. Now Check Your Admin panel.

here, "my_custom_css" is a function for css.
& "add_action('admin_head', 'my_custom_css');" this for call that function in header part of the page.


-----------------------------------------------
For Login page CSS use "login_head"
-----------------------------------------------
add_action('login_head', 'custom_loginlogo');

function custom_loginlogo() {
echo '';
}

-----------------------------------------------
For Whole site Frontend & backend CSS use "init"
-----------------------------------------------
add_action('init', 'my_custom_css');

function my_custom_css() {

echo ''
}

-----------------------------------------------
For User base Front End & Back End CSS use "init"
-----------------------------------------------
add_action('init', 'my_custom_css');

function my_custom_css() {
if(!current_user_can('administrator')){

//Hide Topbar
add_filter('show_admin_bar', '__return_false');

echo '';
}
}



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