cleanup.php

<?php
/**
 * Clean up WordPress defaults
 */

if ( ! function_exists( 'base_start_cleanup' ) ) :
function base_start_cleanup() {
	// Launching operation cleanup.
	add_action( 'init', 'base_cleanup_head' );
	// Remove WP version from RSS.
	add_filter( 'the_generator', 'base_remove_rss_version' );
	// Remove pesky injected css for recent comments widget.
	add_filter( 'wp_head', 'base_remove_wp_widget_recent_comments_style', 1 );
	// Clean up comment styles in the head.
	add_action( 'wp_head', 'base_remove_recent_comments_style', 1 );
  // Change JPEG Compression
  add_filter( 'jpeg_quality', create_function( '', 'return 100;' ) );
}
add_action( 'after_setup_theme','base_start_cleanup' );
endif;

/**
 * Clean up head
 */

if ( ! function_exists( 'base_cleanup_head' ) ) :
function base_cleanup_head() {
	// EditURI link.
	remove_action( 'wp_head', 'rsd_link' );
	// Category feed links.
	remove_action( 'wp_head', 'feed_links_extra', 3 );
	// Post and comment feed links.
	remove_action( 'wp_head', 'feed_links', 2 );
	// Windows Live Writer.
	remove_action( 'wp_head', 'wlwmanifest_link' );
	// Index link.
	remove_action( 'wp_head', 'index_rel_link' );
	// Previous link.
	remove_action( 'wp_head', 'parent_post_rel_link', 10, 0 );
	// Start link.
	remove_action( 'wp_head', 'start_post_rel_link', 10, 0 );
	// Shortlink.
	remove_action( 'wp_head', 'wp_shortlink_wp_head', 10, 0 );
	// Links for adjacent posts.
	remove_action( 'wp_head', 'adjacent_posts_rel_link_wp_head', 10, 0 );
	// WP version.
	remove_action( 'wp_head', 'wp_generator' );
	// Emoji detection script.
	remove_action( 'wp_head', 'print_emoji_detection_script', 7 );
	// Emoji styles.
	remove_action( 'wp_print_styles', 'print_emoji_styles' );
}
endif;

// Remove WP version from RSS.
if ( ! function_exists( 'base_remove_rss_version' ) ) :
function base_remove_rss_version() { return ''; }
endif;

// Remove injected CSS for recent comments widget.
if ( ! function_exists( 'base_remove_wp_widget_recent_comments_style' ) ) :
function base_remove_wp_widget_recent_comments_style() {
	if ( has_filter( 'wp_head', 'wp_widget_recent_comments_style' ) ) {
	  remove_filter( 'wp_head', 'wp_widget_recent_comments_style' );
	}
}
endif;

// Remove injected CSS from recent comments widget.
if ( ! function_exists( 'base_remove_recent_comments_style' ) ) :
function base_remove_recent_comments_style() {
	global $wp_widget_factory;
	if ( isset($wp_widget_factory->widgets['WP_Widget_Recent_Comments']) ) {
	remove_action( 'wp_head', array($wp_widget_factory->widgets['WP_Widget_Recent_Comments'], 'recent_comments_style') );
	}
}
endif;

?>