---
# System prepended metadata

title: WordPress Snippets

---

# WordPress Snippets

## Add code into <head> / \<footer> tag
**Nota:** Adicionar no ficheiro `functions.php` ou usar o plugin `Code Snippets`.

### Header Code
```php
// Header Code
add_action('wp_head', 'headCode'); 

function headCode(){
?>
	<!-- Header Code -->
<?php
};
```

### Footer Code
```php
// Footer Code
add_action('wp_footer', 'footerCode'); function footerCode(){
?>
<!-- Footer Code -->
<?php
};

```

------- 

## Disable Comments
**Nota:** Adicionar no ficheiro `functions.php` ou usar o plugin `Code Snippets`.



```php
// Disable support for comments and trackbacks in post types
function df_disable_comments_post_types_support()
{
    $post_types = get_post_types();
    foreach ($post_types as $post_type) {
        if (post_type_supports($post_type, 'comments')) {
            remove_post_type_support($post_type, 'comments');
            remove_post_type_support($post_type, 'trackbacks');
        }
    }
}
add_action('admin_init', 'df_disable_comments_post_types_support');
// Close comments on the front-end
function df_disable_comments_status()
{
    return false;
}
add_filter('comments_open', 'df_disable_comments_status', 20, 2);
add_filter('pings_open', 'df_disable_comments_status', 20, 2);
// Hide existing comments
function df_disable_comments_hide_existing_comments($comments)
{
    $comments = array();
    return $comments;
}
add_filter('comments_array', 'df_disable_comments_hide_existing_comments', 10, 2);
// Remove comments page in menu
function df_disable_comments_admin_menu()
{
    remove_menu_page('edit-comments.php');
}
add_action('admin_menu', 'df_disable_comments_admin_menu');
// Redirect any user trying to access comments page
function df_disable_comments_admin_menu_redirect()
{
    global $pagenow;
    if ($pagenow === 'edit-comments.php') {
        wp_redirect(admin_url());
        exit;
    }
}
add_action('admin_init', 'df_disable_comments_admin_menu_redirect');
// Remove comments metabox from dashboard
function df_disable_comments_dashboard()
{
    remove_meta_box('dashboard_recent_comments', 'dashboard', 'normal');
}
add_action('admin_init', 'df_disable_comments_dashboard');

// Remove comments links from admin bar
function df_disable_comments_admin_bar()
{
    if (is_admin_bar_showing()) {
        remove_action('admin_bar_menu', 'wp_admin_bar_comments_menu', 60);
    }
}
add_action('init', 'df_disable_comments_admin_bar');

```

-----

## Duplicate pages and posts
**Nota:** Adicionar no ficheiro `functions.php` ou usar o plugin `Code Snippets`.

```php
/*
 * Function for post duplication. Dups appear as drafts. User is redirected to the edit screen
 */
function rd_duplicate_post_as_draft(){
  global $wpdb;
  if (! ( isset( $_GET['post']) || isset( $_POST['post'])  || ( isset($_REQUEST['action']) && 'rd_duplicate_post_as_draft' == $_REQUEST['action'] ) ) ) {
    wp_die('No post to duplicate has been supplied!');
  }
 
  /*
   * Nonce verification
   */
  if ( !isset( $_GET['duplicate_nonce'] ) || !wp_verify_nonce( $_GET['duplicate_nonce'], basename( __FILE__ ) ) )
    return;
 
  /*
   * get the original post id
   */
  $post_id = (isset($_GET['post']) ? absint( $_GET['post'] ) : absint( $_POST['post'] ) );
  /*
   * and all the original post data then
   */
  $post = get_post( $post_id );
 
  /*
   * if you don't want current user to be the new post author,
   * then change next couple of lines to this: $new_post_author = $post->post_author;
   */
  $current_user = wp_get_current_user();
  $new_post_author = $current_user->ID;
 
  /*
   * if post data exists, create the post duplicate
   */
  if (isset( $post ) && $post != null) {
 
    /*
     * new post data array
     */
    $args = array(
      'comment_status' => $post->comment_status,
      'ping_status'    => $post->ping_status,
      'post_author'    => $new_post_author,
      'post_content'   => $post->post_content,
      'post_excerpt'   => $post->post_excerpt,
      'post_name'      => $post->post_name,
      'post_parent'    => $post->post_parent,
      'post_password'  => $post->post_password,
      'post_status'    => 'draft',
      'post_title'     => $post->post_title,
      'post_type'      => $post->post_type,
      'to_ping'        => $post->to_ping,
      'menu_order'     => $post->menu_order
    );
 
    /*
     * insert the post by wp_insert_post() function
     */
    $new_post_id = wp_insert_post( $args );
 
    /*
     * get all current post terms ad set them to the new post draft
     */
    $taxonomies = get_object_taxonomies($post->post_type); // returns array of taxonomy names for post type, ex array("category", "post_tag");
    foreach ($taxonomies as $taxonomy) {
      $post_terms = wp_get_object_terms($post_id, $taxonomy, array('fields' => 'slugs'));
      wp_set_object_terms($new_post_id, $post_terms, $taxonomy, false);
    }
 
    /*
     * duplicate all post meta just in two SQL queries
     */
    $post_meta_infos = $wpdb->get_results("SELECT meta_key, meta_value FROM $wpdb->postmeta WHERE post_id=$post_id");
    if (count($post_meta_infos)!=0) {
      $sql_query = "INSERT INTO $wpdb->postmeta (post_id, meta_key, meta_value) ";
      foreach ($post_meta_infos as $meta_info) {
        $meta_key = $meta_info->meta_key;
        if( $meta_key == '_wp_old_slug' ) continue;
        $meta_value = addslashes($meta_info->meta_value);
        $sql_query_sel[]= "SELECT $new_post_id, '$meta_key', '$meta_value'";
      }
      $sql_query.= implode(" UNION ALL ", $sql_query_sel);
      $wpdb->query($sql_query);
    }
 
 
    /*
     * finally, redirect to the edit post screen for the new draft
     */
    wp_redirect( admin_url( 'post.php?action=edit&post=' . $new_post_id ) );
    exit;
  } else {
    wp_die('Post creation failed, could not find original post: ' . $post_id);
  }
}
add_action( 'admin_action_rd_duplicate_post_as_draft', 'rd_duplicate_post_as_draft' );
 
/*
 * Add the duplicate link to action list for post_row_actions
 */
function rd_duplicate_post_link( $actions, $post ) {
  if (current_user_can('edit_posts')) {
    $actions['duplicate'] = '<a href="' . wp_nonce_url('admin.php?action=rd_duplicate_post_as_draft&post=' . $post->ID, basename(__FILE__), 'duplicate_nonce' ) . '" title="Duplicate this item" rel="permalink">Duplicate</a>';
  }
  return $actions;
}
 
add_filter( 'post_row_actions', 'rd_duplicate_post_link', 10, 2 );
add_filter('page_row_actions', 'rd_duplicate_post_link', 10, 2);

```

-----

## Update slug when change title
**Nota:** Adicionar no ficheiro `functions.php` ou usar o plugin `Code Snippets`.

```php
function updateSlugWithPlus($data, $postarr) {
	if (strpos($data['post_title'], '+')) {
		$data['post_name'] = sanitize_title($data['post_title']) . '-
	plus';
    } else {
		$data['post_name'] = sanitize_title($data['post_title']); 
	}
    
    return $data;
}
add_filter('wp_insert_post_data', 'updateSlugWithPlus', 99, 2);
```

-----

## Allow upload SVG files
**Nota:** Adicionar no ficheiro `functions.php` ou usar o plugin `Code Snippets`.

```php
function allowSVG($file_types) {
	$new_filetypes = array();
	$new_filetypes['svg'] = 'image/svg+xml';
	$file_types = array_merge($file_types, $new_filetypes); return $file_types;
}

add_action('upload_mimes', 'allowSVG');
```

-----

## Customize Login
**Nota:** Adicionar no ficheiro `functions.php` ou usar o plugin `Code Snippets`.

```php
// Customize Logo and Background
function customizeLogin() {
?>
    <style>
        #login h1 a, .login h1 a {
            background-image: url("/wp-content/uploads/2019/09/Logos-CM2C-final-hair-clinic.png");
            width: 200px;
            background-size: cover;
		    background-repeat: no-repeat;
        }

        body {
            background: url("/wp-content/uploads/2019/09/decor_lisboa-02.png") !important;
            background-repeat: no-repeat;
            background-size: cover;
        }
    </style>
<?php
}

add_action( 'login_enqueue_scripts', 'customizeLogin' );
```

```php
// Customize Logo URL
function loginLogoUrl() {
    return home_url();
}
add_filter( 'login_headerurl', 'loginLogoUrl' );

function loginLogoUrlTitle() {
    return 'CM2C';
}
add_filter( 'login_headertitle', 'loginLogoUrlTitle' );
```