wp-optimize / minify / class-wp-optimize-minify-print.php

class-wp-optimize-minify-print.php in WP-Optimize – Cache, Compress images, Minify & Clean database to boost page speed & performance 3.6.0, at minify/class-wp-optimize-minify-print.php

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1	<?php
2	if (!defined('ABSPATH')) die('No direct access allowed');
3
4	if (!class_exists('WP_Optimize_Minify_Functions')) {
5	include WP_OPTIMIZE_MINIFY_DIR.'/class-wp-optimize-minify-functions.php';
6	}
7
8	class WP_Optimize_Minify_Print {
9
10	/**
11	* Load the script using loadAsync JavaScript
12	*
13	* @param string $href
14	* @param boolean $print
15	* @return string\|void
16	*/
17	public static function async_script($href, $print = true) {
18	$wpo_minify_options = wp_optimize_minify_config()->get();
19	$tag = '<script>' . "\n";
20	$user_agent = isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : '';
21	$tag .= 'var wpo_server_info_js = ' . json_encode(array("user_agent" => $user_agent)) . "\n";
22
23	$exclude_js_from_page_speed_tools = $wpo_minify_options['exclude_js_from_page_speed_tools'];
24	$enable_defer_js = $wpo_minify_options['enable_defer_js'];
25	$is_conditional_loading = $exclude_js_from_page_speed_tools && 'all' !== $enable_defer_js;
26	if ($is_conditional_loading) {
27	$tag .= 'if (!(navigator.userAgent + " " + wpo_server_info_js.user_agent).match(/' . implode("\|", $wpo_minify_options['ualist']) .'/i)) {' . "\n";
28	}
29	$tag .= " loadAsync('$href', null);" . "\n";
30	if ($is_conditional_loading) {
31	$tag .= '}';
32	}
33	$tag .= '</script>' . "\n";
34
35	if ($print) {
36	echo $tag;
37	} else {
38	return $tag;
39	}
40	}
41
42	/**
43	* Print a style that will be loaded async using 'preload'
44	*
45	* @param string $href
46	* @param string $media
47	* @return void
48	*/
49	public static function async_style($href, $media = 'all') {
50	echo '<link rel="preload" href="'.$href.'" as="style" media="'.$media.'" onload="this.onload=null;this.rel=\'stylesheet\'">' . "\n";
51	// fix for firefox not supporting preload
52	echo '<link rel="stylesheet" href="'.$href.'" media="'.$media.'">' . "\n";
53	echo '<noscript><link rel="stylesheet" href="'.$href.'" media="'.$media.'"></noscript>' . "\n";
54	echo '<!--[if IE]><link rel="stylesheet" href="'.$href.'" media="'.$media.'"><![endif]-->' . "\n";
55	}
56
57	/**
58	* Print a style that will be loaded by JS
59	*
60	* @param string $href
61	* @return void
62	*/
63	public static function exclude_style($href) {
64	$wpo_minify_options = wp_optimize_minify_config()->get();
65	// make a stylesheet, hide from PageSpeedIndex
66	$cssguid = 'wpo_min'.hash('adler32', $href);
67	$tag = '<script>' . "\n";
68	$user_agent = isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : '';
69	$tag .= 'var wpo_server_info_css = ' . json_encode(array("user_agent" => $user_agent)) . "\n";
70
71	$exclude_css_from_page_speed_tools = $wpo_minify_options['exclude_css_from_page_speed_tools'];
72	if ($exclude_css_from_page_speed_tools) {
73	$tag .= 'if (!(navigator.userAgent + " " + wpo_server_info_css.user_agent).match(/'.implode('\|', $wpo_minify_options['ualist']).'/i)){' . "\n";
74	}
75	$tag .= ' var '.$cssguid.'=document.createElement("link");'.$cssguid.'.rel="stylesheet",'.$cssguid.'.type="text/css",'.$cssguid.'.media="async",'.$cssguid.'.href="'.$href.'",'.$cssguid.'.onload=function() {'.$cssguid.'.media="all"},document.getElementsByTagName("head")[0].appendChild('.$cssguid.');' . "\n";
76	if ($exclude_css_from_page_speed_tools) {
77	$tag .= '}';
78	}
79	$tag .= '</script>' . "\n";
80	echo $tag;
81	}
82
83	/**
84	* Inline a single style
85	*
86	* @param string $handle
87	* @param string $href
88	* @return boolean
89	*/
90	public static function inline_style($handle, $href) {
91	$wpo_minify_options = wp_optimize_minify_config()->get();
92
93	// font awesome processing, inline
94	// download, minify, cache
95	$tkey = 'css-'.hash('adler32', $href).'.css';
96	$json = WP_Optimize_Minify_Cache_Functions::get_transient($tkey);
97	if (false === $json) {
98	$json = WP_Optimize_Minify_Functions::download_and_minify($href, null, $wpo_minify_options['enable_css_minification'], 'css', $handle);
99	if ($wpo_minify_options['debug']) {
100	echo "<!-- wpo_min DEBUG: Uncached file processing now for $href -->" . "\n";
101	}
102	WP_Optimize_Minify_Cache_Functions::set_transient($tkey, $json);
103	}
104
105	// decode
106	$res = json_decode($json, true);
107
108	// add font-display
109	// https://developers.google.com/web/updates/2016/02/font-display
110	$res['code'] = str_ireplace('font-style:normal;', 'font-display:block;font-style:normal;', $res['code']);
111
112	// inline css or fail
113	if (false != $res['status']) {
114	echo '<style type="text/css" media="all">' . "\n";
115	echo $res['code'] . "\n";
116	echo '</style>' . "\n";
117	return true;
118	} else {
119	return false;
120	}
121	}
122
123	/**
124	* Print a normal style tag pointing the href
125	*
126	* @param string $href
127	* @return void
128	*/
129	public static function style($href) {
130	echo '<link rel="stylesheet" href="'.$href.'" media="all">' . "\n";
131	}
132
133	/**
134	* Write header
135	*
136	* @param string $file
137	* @param string $headers
138	* @return void
139	*/
140	public static function write_header($file, $headers) {
141	file_put_contents($file, $headers);
142	WP_Optimize_Minify_Cache_Functions::fix_permission_bits($file);
143	}
144
145	/**
146	* Write CSS
147	*
148	* @param string $file
149	* @param string $code
150	* @param string $log
151	* @return void
152	*/
153	public static function write_combined_asset($file, $code, $log) {
154	file_put_contents($file.'.json', json_encode($log));
155	file_put_contents($file, $code);
156	// permissions
157	WP_Optimize_Minify_Cache_Functions::fix_permission_bits($file.'.json');
158	WP_Optimize_Minify_Cache_Functions::fix_permission_bits($file);
159
160	if (function_exists('gzencode')) {
161	file_put_contents($file.'.gz', gzencode(file_get_contents($file), 9));
162	WP_Optimize_Minify_Cache_Functions::fix_permission_bits($file.'.gz');
163	}
164
165	// brotli static support
166	if (function_exists('brotli_compress')) {
167	file_put_contents($file.'.br', brotli_compress(file_get_contents($file), 11));
168	WP_Optimize_Minify_Cache_Functions::fix_permission_bits($file.'.br');
169	}
170	}
171	/**
172	* Load async scripts with callback
173	*
174	* @return void
175	*/
176	public static function add_load_async() {
177	$min_or_not_internal = WP_Optimize()->get_min_or_not_internal_string();
178	$contents = file_get_contents(trailingslashit(WPO_PLUGIN_MAIN_PATH) . "js/loadAsync$min_or_not_internal.js");
179	echo "<script>$contents</script>\n";
180	}
181
182	/**
183	* Defer CSS globally from the header (order matters)
184	* Dev: https://www.filamentgroup.com/lab/async-css.html
185	*
186	* @return void
187	*/
188	public static function add_load_css() {
189	$min_or_not_internal = WP_Optimize()->get_min_or_not_internal_string();
190	$contents = file_get_contents(trailingslashit(WPO_PLUGIN_MAIN_PATH) . "js/loadCSS$min_or_not_internal.js");
191	echo "<script>$contents</script>" . "\n";
192	}
193	}
194