Skip to content

Instantly share code, notes, and snippets.

@dexit

dexit/funcions.php

Created November 21, 2023 15:10
Show Gist options
  • Save dexit/5f6bff0c4328275d8ef98aa8df0acbf8 to your computer and use it in GitHub Desktop.
Save dexit/5f6bff0c4328275d8ef98aa8df0acbf8 to your computer and use it in GitHub Desktop.
Download ZIP
PHP wordpress funcions quick list
Raw
funcions.php
<?php
/**
* Add some security headers
*
* @package wp-tweaks
*/
if ( ! defined( 'WPINC' ) ) die();
add_action( 'wp_headers', 'wp_tweaks_security_headers' );
function wp_tweaks_security_headers ( $headers ) {
$options = WP_Tweaks::get_option( 'security-headers' );
$values = apply_filters(
'wp_tweaks_security_headers_values',
[
'strict-transport-security' => 'max-age=31536000; includeSubDomains; preload',
'x-content-type-options' => 'nosniff',
'x-xss-protection' => '1; mode=block',
'content-security-policy' => "default-src https:; font-src https: data:; img-src https: data:; script-src https: 'unsafe-inline' 'unsafe-eval'; style-src https: 'unsafe-inline'",
'x-frame-options' => 'sameorigin',
'referrer-policy' => 'strict-origin-when-cross-origin',
'permissions-policy' => 'geolocation=(), microphone=(), camera=(), interest-cohort=()'
]
);
foreach ( $options as $key ) {
$headers[ $key ] = $values[ $key ];
}
return $headers;
}
# add_action( 'init', 'remove_wordpress_features' );
function remove_wordpress_features() {
// Remove RSS feeds
remove_action( 'wp_head', 'feed_links', 2 );
remove_action( 'wp_head', 'feed_links_extra', 3 );
// Remove <link> elements from <head>
remove_action( 'wp_head', 'rsd_link' );
remove_action( 'wp_head', 'wlwmanifest_link' );
remove_action( 'wp_head', 'adjacent_posts_rel_link_wp_head', 10, 0 );
remove_action( 'wp_head', 'parent_post_rel_link', 10, 0 );
remove_action( 'wp_head', 'index_rel_link' );
remove_action( 'wp_head', 'start_post_rel_link', 10, 0 );
// Remove WordPress version and shortlink
add_action( 'the_generator', 'remove_version_info' );
function remove_version_info() { return ''; }
remove_action( 'wp_head', 'wp_generator' );
remove_action( 'wp_head', 'wp_shortlink_wp_head', 10, 0 );
// Remove inline styles from Tag cloud
add_filter( 'wp_generate_tag_cloud', 'xf_tag_cloud', 10, 3 );
function xf_tag_cloud( $tag_string ) {
return preg_replace( "/style='font-size:.+pt;'/", '', $tag_string );
}
// Remove Emojis from WordPress
add_filter( 'tiny_mce_plugins', 'disable_emojicons_tinymce' );
function disable_emojicons_tinymce( $plugins ) {
if ( is_array( $plugins ) ) {
return array_diff( $plugins, array( 'wpemoji' ) );
} else {
return array();
}
}
remove_action( 'admin_print_styles', 'print_emoji_styles' );
remove_action( 'wp_head', 'print_emoji_detection_script', 7 );
remove_action( 'admin_print_scripts', 'print_emoji_detection_script' );
remove_action( 'wp_print_styles', 'print_emoji_styles' );
remove_filter( 'wp_mail', 'wp_staticize_emoji_for_email' );
remove_filter( 'the_content_feed', 'wp_staticize_emoji' );
remove_filter( 'comment_text_rss', 'wp_staticize_emoji' );
}
// Remove Pingback method
add_filter( 'xmlrpc_methods', 'remove_xmlrpc_pingback_method' );
function remove_xmlrpc_pingback_method( $methods ) {
unset( $methods['pingback.ping'] );
return $methods;
}
// Disable pingback_url form get_bloginfo (<link rel="pingback" />)
add_filter( 'bloginfo_url', 'disable_pingback_url', 11, 2 );
function disable_pingback_url( $output, $property ) {
return ( $property === 'pingback_url' ) ? null : $output;
}
// Disable X-Pingback HTTP Header
add_filter( 'wp_headers', 'disable_pingback_header', 11, 2 );
function disable_pingback_header( $headers, $wp_query ) {
if ( isset( $headers['X-Pingback'] ) ) unset( $headers['X-Pingback'] );
return $headers;
}
// Disable XML-RPC completely
# add_filter( 'xmlrpc_enabled', '__return_false' );
// Disable specific XML-RPC calls
add_action( 'xmlrpc_call', 'disable_xmlrpc_calls' );
function disable_xmlrpc_calls( $method ) {
switch ( $method ) {
case 'pingback.ping':
wp_die(
'Pingback functionality is disabled on this site',
'Pingback disabled', array( 'response' => 403 )
);
break;
default:
return;
}
}
/**
* Set the image quality for Thumbnails
*
* @param int $quality The default quality (90)
* @return int $quality Full quality (100)
*/
add_filter( 'jpeg_quality', 'image_quality' );
add_filter( 'wp_editor_set_quality', 'set_custom_image_quality' );
function set_custom_image_quality( $quality ) {
return 100;
}
/**
* Customize Body classes
*
* @link http://codex.wordpress.org/Function_Reference/body_class
*/
#add_filter( 'body_class', 'theme_body_classes', 10, 2 );
if ( ! function_exists( 'theme_body_classes' ) ) {
function theme_body_classes( $wp_classes = array(), $extra_classes = array() ) {
global $post;
// List of general classes we want to keep
// Return modified classes
return $theme_classes;
}
}
/**
* Remove WordPress version number in frontend
*
* @package wp-tweaks
*/
if ( ! defined( 'WPINC' ) ) die();
add_filter( 'the_generator', '__return_empty_string' );
/**
* Disable Emoji Mess
*
* @package wp-tweaks
*/
if ( ! defined( 'WPINC' ) ) die();
remove_action( 'wp_head', 'print_emoji_detection_script', 7 );
remove_action( 'admin_print_scripts', 'print_emoji_detection_script' );
remove_action( 'embed_head', 'print_emoji_detection_script' );
remove_action( 'wp_print_styles', 'print_emoji_styles' );
remove_action( 'admin_print_styles', 'print_emoji_styles' );
remove_filter( 'the_content_feed', 'wp_staticize_emoji' );
remove_filter( 'comment_text_rss', 'wp_staticize_emoji' );
remove_filter( 'wp_mail', 'wp_staticize_emoji_for_email' );
add_filter( 'tiny_mce_plugins', 'wp_tweaks_disable_emojicons_tinymce' );
add_filter( 'emoji_svg_url', '__return_false' );
function wp_tweaks_disable_emojicons_tinymce ( $plugins ) {
return is_array( $plugins ) ? array_diff( $plugins, [ 'wpemoji' ] ) : [];
}
/**
* Remove WordPress version number in frontend
*
* @package wp-tweaks
*/
if ( ! defined( 'WPINC' ) ) die();
add_filter( 'the_generator', '__return_empty_string' );
/**
* Disable `/users` endpoint in REST API
*
* @package wp-tweaks
*/
if ( ! defined( 'WPINC' ) ) die();
add_filter( 'rest_endpoints', 'wp_tweaks_disable_rest_api_users_endpoint' );
function wp_tweaks_disable_rest_api_users_endpoint ( $endpoints ) {
if ( isset( $endpoints['/wp/v2/users'] ) ) {
unset( $endpoints['/wp/v2/users'] );
}
if ( isset( $endpoints['/wp/v2/users/(?P<id>[\d]+)'] ) ) {
unset( $endpoints['/wp/v2/users/(?P<id>[\d]+)'] );
}
return $endpoints;
}
/**
* Display generic error message in login form
*
* @package wp-tweaks
*/
if ( ! defined( 'WPINC' ) ) die();
add_filter( 'wp_login_errors', 'wp_tweaks_login_error', 99 );
function wp_tweaks_login_error ( $errors ) {
if ( ! is_wp_error( $errors ) ) return new WP_Error();
$has_login_error = false;
$login_errors = [
'empty_username',
'invalid_username',
'empty_password',
'incorrect_password',
'invalid_email',
];
foreach ( $login_errors as $code ) {
if ( 0 === count( $errors->get_error_messages( $code ) ) ) {
continue;
}
$errors->remove( $code );
$has_login_error = true;
}
if ( $has_login_error ) {
$errors->add(
'invalid',
apply_filters(
'wp_tweaks_login_error',
esc_html__( 'Incorrect username or password.', 'wp-tweaks' )
)
);
}
return $errors;
}
/**
* Hide WordPress version in admin footer
*
* @package wp-tweaks
*/
if ( ! defined( 'WPINC' ) ) die();
add_action( 'admin_menu', 'wp_tweaks_hide_version_in_admin_footer' );
function wp_tweaks_hide_version_in_admin_footer () {
if ( ! current_user_can( 'install_plugins' ) ) {
remove_filter( 'update_footer', 'core_update_footer' );
}
}
/**
* Remove some Dashboard Widgets
*
* @package wp-tweaks
*/
if ( ! defined( 'WPINC' ) ) die();
add_action( 'admin_init', 'wp_tweaks_remove_dashboard_widgets' );
function wp_tweaks_remove_dashboard_widgets () {
remove_meta_box( 'dashboard_primary', 'dashboard', 'side' );
remove_meta_box( 'dashboard_secondary', 'dashboard', 'normal' );
remove_meta_box( 'dashboard_quick_press', 'dashboard', 'side' );
remove_meta_box( 'dashboard_recent_comments', 'dashboard', 'normal' );
if ( ! current_user_can('administrator') ) {
remove_meta_box( 'dashboard_site_health', 'dashboard', 'normal' );
}
}
// Remove classic theme styles.
// https://github.com/WordPress/WordPress/commit/143fd4c1f71fe7d5f6bd7b64c491d9644d861355
function remove_classic_theme_styles(): void
{
wp_dequeue_style('classic-theme-styles');
}
// Remove Gutenberg's front-end block styles.
function remove_block_styles(): void
{
wp_deregister_style('wp-block-library');
wp_deregister_style('wp-block-library-theme');
}
add_action('wp_enqueue_scripts','remove_block_styles');
// Remove Gutenberg's global styles.
// https://github.com/WordPress/gutenberg/pull/34334#issuecomment-911531705
function remove_global_styles(): void
{
wp_dequeue_style('global-styles');
}
add_action('wp_enqueue_scripts','remove_global_styles');
function disable_rest_endpoints(array $endpoints): array
{
if (!is_user_logged_in()) {
if (isset($endpoints['/wp/v2/users'])) {
unset($endpoints['/wp/v2/users']);
}
if (isset($endpoints['/wp/v2/users/(?P<id>[\d]+)'])) {
unset($endpoints['/wp/v2/users/(?P<id>[\d]+)']);
}
}
return $endpoints;
}
add_filter('rest_endpoints','disable_rest_endpoints');
// Remove JPEG compression.
function remove_jpeg_compression(): int
{
return 70;
}
add_filter('jpeg_quality','remove_jpeg_compression', 10, 2);
/**
* Remove query strings from resources.
*
* @param string $src The link from which to remove the version query string.
*/
function apc_cleanup_query_string( $src ) {
$parts = explode( '?ver', $src );
return $parts[0];
}
add_filter( 'script_loader_src', 'apc_cleanup_query_string', 15, 1 );
add_filter( 'style_loader_src', 'apc_cleanup_query_string', 15, 1 );
/**
* Add DNS Prefetching and Preconnecting Resource Hints to the <head>
*
* Preload: fetch high priority resource used in current route
* Preconnect: resolves DNS and TCP handshaking
* Prefetch: fetches resources probably needed for next page load (low priority)
*/
function swm_dns_prefetch_preconnect() {
echo "
<meta https-equiv='x-dns-prefetch-control' content='on'>
<link rel='dns-prefetch' href='//s.gravatar.com/' />
<link rel='dns-prefetch' href='//0.gravatar.com/' />
<link rel='dns-prefetch' href='//1.gravatar.com/' />
<link rel='dns-prefetch' href='//2.gravatar.com/' />
<link rel='dns-prefetch' href='//maps.googleapis.com/' />
<link rel='dns-prefetch' href='//maps.gstatic.com/' />
<link rel='dns-prefetch' href='//ajax.googleapis.com/' />
<link rel='dns-prefetch' href='//fonts.gstatic.com/' />
<link rel='preconnect' href='//fonts.gstatic.com/' crossorigin>
<link rel='dns-prefetch' href='//fonts.googleapis.com' />
<link rel='preconnect' href='//fonts.googleapis.com/' crossorigin>
<link rel='dns-prefetch' href='//apis.google.com/' />
<link rel='dns-prefetch' href='//youtube.com/' />
<link rel='dns-prefetch' href='//s0.wp.com/' />
<link rel='dns-prefetch' href='//s1.wp.com/' />
<link rel='dns-prefetch' href='//s2.wp.com/' />
<link rel='dns-prefetch' href='//stats.wp.com/' />
";
/*
<link rel='dns-prefetch' href='//api.pinterest.com/' />
<link rel='dns-prefetch' href='//google-analytics.com/' />
<link rel='dns-prefetch' href='//www.google-analytics.com/' />
<link rel='dns-prefetch' href='//ssl.google-analytics.com/' />
//cdnjs.cloudflare.com
//pixel.wp.com
//connect.facebook.net
//platform.twitter.com
//syndication.twitter.com
//platform.instagram.com
//disqus.com
//sitename.disqus.com
//s7.addthis.com
//platform.linkedin.com
//w.sharethis.com
Not needed because it is included with DIVI:
*/
}
add_action( 'wp_head', 'swm_dns_prefetch_preconnect', 0 );
/**
* Filter the except length to 20 words.
*
* By default, the excerpt length is 50 words.
*
* @param int $length Excerpt length.
* @return int (Maybe) modified excerpt length.
*/
function apway_custom_excerpt_length( $length ) {
return 20;
}
add_filter( 'excerpt_length', 'apway_custom_excerpt_length', 999 );
/**
* Filter the "read more" excerpt string link to the post.
*
* @param string $more "Read more" excerpt string.
* @return string (Maybe) modified "read more" excerpt string.
*/
function apway_excerpt_readmore( $more ) {
if ( ! is_single() ) {
$more = sprintf(
'<div class="view-full-post"><a class="read-more" href="%1$s" class="view-full-post-btn">&hellip; %2$s &raquo;</a></div>',
get_permalink( get_the_ID() ),
__( 'Read More', 'textdomain' )
);
}
return $more;
}
add_filter( 'excerpt_more', 'apway_excerpt_readmore' );
/**
* Change the `Read More` text after the trimmed excerpt
*
* Filters the string in the “more” link displayed after a trimmed excerpt. This
* filter is used by wp_trim_excerpt() function. By default it is set to echo '[…]'
* more string at the end of the excerpt.
*
* @see https://developer.wordpress.org/reference/hooks/excerpt_more/
*
* @param string $translated "Read more" excerpt string.
* @return string $translated modified "read more" excerpt string.
*/
function apway_translate_readmore_text( $translated ) {
$translated = str_ireplace( 'read more', '&hellip; Read More &raquo;', $translated );
// $translated = str_ireplace( '« Older Entries', '< Older Posts', $translated );
// $translated = str_ireplace( 'Next Entries »', 'Newer Posts >', $translated );
return $translated;
}
add_filter( 'gettext', 'apway_translate_readmore_text' );
add_filter( 'ngettext', 'apway_translate_readmore_text' );
/* Filters the array of parsed query variables. */
add_filter( 'request', 'apway_filter_referral_spam_requests', 0 );
/** Serve 404 to referrers on the current Blacklist */
function apway_filter_referral_spam_requests( $request ) {
global $wp_query;
/* Retrieve referer from ‘_wp_http_referer’ or HTTP referer. */
$referrer = wp_get_referer() !== false ? wp_get_referer() : ( isset( $_SERVER['HTTP_REFERER'] ) ? $_SERVER['HTTP_REFERER'] : '' ); // Input var okay.
if ( empty( $referrer ) ) {
return $request;
}
/* Parses a URL and returns an associative array containing its components.
* The values of the array elements are not URL decoded
*/
$referrer = parse_url( $referrer, PHP_URL_HOST );
/* Get the blacklist */
$referrers_blacklist = apway_referrals_blacklist();
if ( empty( $referrers_blacklist ) ) {
return $request;
}
$is_blacklisted = false;
/* check the referrer against the blacklist */
foreach ( $referrers_blacklist as $blist_ref ) {
if ( false !== stripos( $referrer, $blist_ref ) ) {
$is_blacklisted = true;
break;
}
}
/* if they are blacklisted, serve them a 404 */
if ( $is_blacklisted ) {
/* Set HTTP status header. */
status_header( 404 );
$wp_query->set_404();
get_template_part( 404 );
exit();
}
return $request;
}
/**
* Gets a list of blacklisted referals from the JSON file of the plugin
* Stop Referrer Spam by Krzysztof Wielogórski
*
* @see https://wordpress.org/plugins/stop-referrer-spam/
*/
function apway_referrals_blacklist() {
/* Retrieves the value of a transient. */
$ret = get_transient( '_referalls_spam_blacklist' );
/* If the transient does not exist/no value/expired, then return = false. */
if ( false === $ret ) {
/* Performs an HTTP request using the GET method and returns its response. */
$response = wp_remote_get( 'https://srs.wielo.co/blacklist.json' );
if ( $response instanceof WP_Error ) {
return;
}
$ret = $response['body'];
if ( empty( $ret ) ) {
return;
}
/* Decodes a JSON string for use in PHP */
$ret = json_decode( $ret, true );
if ( null === $ret ) {
return;
}
set_transient( '_referalls_spam_blacklist', $ret, DAY_IN_SECONDS ); // Refresh daily.
}
return $ret;
}
function add_post_image_to_rss( $content ) {
global $post;
if ( has_post_thumbnail( $post->ID ) ) {
$content = '<div>' . get_the_post_thumbnail( $post->ID, 'large', array( 'style' => 'margin-bottom: 15px;' ) ) . '</div>' . $content;
}
return $content;
}
add_filter( 'the_excerpt_rss', 'add_post_images_to_rss' );
add_filter( 'the_content_feed', 'add_post_images_to_rss' );
function the_excerpt_max_charlength( $charlength ) {
$excerpt = get_the_excerpt();
$charlength++;
if ( mb_strlen( $excerpt ) > $charlength ) {
$subex = mb_substr( $excerpt, 0, $charlength - 5 );
$exwords = explode( ' ', $subex );
$excut = - ( mb_strlen( $exwords[ count( $exwords ) - 1 ] ) );
if ( $excut < 0 ) {
echo mb_substr( $subex, 0, $excut );
} else {
echo $subex;
}
echo '...';
} else {
echo $excerpt;
}
}
// Put this code in functions.php or a separate plugin
add_action( 'rest_api_init', 'register_rest_images' );
function register_rest_images() {
register_rest_field( array( 'post' ),
'fimg_url',
array(
'get_callback' => 'get_rest_featured_image',
'update_callback' => null,
'schema' => null,
)
);
}
function get_rest_featured_image( $object, $field_name, $request ) {
if ( $object['featured_media'] ) {
$img = wp_get_attachment_image_src( $object['featured_media'], 'thumbnail' ); // change 'thumbnail' to other image size if needed
if ( empty( $img ) ) {
return false;
}
return $img[0];
}
return false;
}
add_action('wp_footer', function () {
?>
<script>
jQuery( document ).ready( function( $ ){
setTimeout( function(){
$('.flatpickr-input').each(function(){ flatpickr( $(this)[0] ).set('dateFormat', 'd/m/Y');});
}, 1000 );
});
</script>
<?php
});
function my_login_logo_one() {
?>
<style type="text/css">
body.login div#login h1 a {
background-image: url("Logo File");
padding-bottom: 30px;
}
</style>
<?php
} add_action( 'login_enqueue_scripts', 'my_login_logo_one' );
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment