# 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' );
```
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