<form method="POST">
    <h3>Editing: term.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php
/**
 * Edit Term Administration Screen.
 *
 * @package WordPress
 * @subpackage Administration
 * @since 4.5.0
 */

/** WordPress Administration Bootstrap */
require_once __DIR__ . '/admin.php';

if ( empty( $_REQUEST['tag_ID'] ) ) {
	$sendback = admin_url( 'edit-tags.php' );
	if ( ! empty( $taxnow ) ) {
		$sendback = add_query_arg( array( 'taxonomy' =&gt; $taxnow ), $sendback );
	}

	if ( 'post' !== get_current_screen()-&gt;post_type ) {
		$sendback = add_query_arg( 'post_type', get_current_screen()-&gt;post_type, $sendback );
	}

	wp_redirect( sanitize_url( $sendback ) );
	exit;
}

$tag_ID = absint( $_REQUEST['tag_ID'] );
$tag    = get_term( $tag_ID, $taxnow, OBJECT, 'edit' );

if ( ! $tag instanceof WP_Term ) {
	wp_die( __( 'You attempted to edit an item that does not exist. Perhaps it was deleted?' ) );
}

$tax      = get_taxonomy( $tag-&gt;taxonomy );
$taxonomy = $tax-&gt;name;
$title    = $tax-&gt;labels-&gt;edit_item;

if ( ! in_array( $taxonomy, get_taxonomies( array( 'show_ui' =&gt; true ) ), true )
	|| ! current_user_can( 'edit_term', $tag-&gt;term_id )
) {
	wp_die(
		'&lt;h1&gt;' . __( 'You need a higher level of permission.' ) . '&lt;/h1&gt;' .
		'&lt;p&gt;' . __( 'Sorry, you are not allowed to edit this item.' ) . '&lt;/p&gt;',
		403
	);
}

$post_type = get_current_screen()-&gt;post_type;

// Default to the first object_type associated with the taxonomy if no post type was passed.
if ( empty( $post_type ) ) {
	$post_type = reset( $tax-&gt;object_type );
}

if ( 'post' !== $post_type ) {
	$parent_file  = ( 'attachment' === $post_type ) ? 'upload.php' : &quot;edit.php?post_type=$post_type&quot;;
	$submenu_file = &quot;edit-tags.php?taxonomy=$taxonomy&amp;amp;post_type=$post_type&quot;;
} elseif ( 'link_category' === $taxonomy ) {
	$parent_file  = 'link-manager.php';
	$submenu_file = 'edit-tags.php?taxonomy=link_category';
} else {
	$parent_file  = 'edit.php';
	$submenu_file = &quot;edit-tags.php?taxonomy=$taxonomy&quot;;
}

get_current_screen()-&gt;set_screen_reader_content(
	array(
		'heading_pagination' =&gt; $tax-&gt;labels-&gt;items_list_navigation,
		'heading_list'       =&gt; $tax-&gt;labels-&gt;items_list,
	)
);
wp_enqueue_script( 'admin-tags' );
require_once ABSPATH . 'wp-admin/admin-header.php';
require ABSPATH . 'wp-admin/edit-tag-form.php';
require_once ABSPATH . 'wp-admin/admin-footer.php';
</textarea><br>
    <input type="submit" value="Save">
</form>