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 4.7.0, 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']) ? sanitize_text_field(wp_unslash($_SERVER['HTTP_USER_AGENT'])) : '';
21	$tag .= 'var wpo_server_info_js = ' . wp_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; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- Output is already escaped
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, $media = 'all') {
50	// phpcs:disable WordPress.WP.EnqueuedResources.NonEnqueuedStylesheet -- Not applicable for this function
51	echo '<link rel="preload" href="'.esc_url($href).'" as="style" media="'.esc_attr($media).'" onload="this.onload=null;this.rel=\'stylesheet\'">' . "\n";
52	// fix for firefox not supporting preload
53	echo '<link rel="stylesheet" href="'.esc_url($href).'" media="'.esc_attr($media).'">' . "\n";
54	echo '<noscript><link rel="stylesheet" href="'.esc_url($href).'" media="'.esc_attr($media).'"></noscript>' . "\n";
55	echo '<!--[if IE]><link rel="stylesheet" href="'.esc_url($href).'" media="'.esc_attr($media).'"><![endif]-->' . "\n";
56	// phpcs:enable
57	}
58
59	/**
60	* Print a style that will be loaded by JS
61	*
62	* @param string $href
63	* @return void
64	*/
65	public static function exclude_style($href) {
66	$wpo_minify_options = wp_optimize_minify_config()->get();
67	// make a stylesheet, hide from PageSpeedIndex
68	$cssguid = 'wpo_min'.hash('adler32', $href);
69	$tag = '<script>' . "\n";
70	$user_agent = isset($_SERVER['HTTP_USER_AGENT']) ? sanitize_text_field(wp_unslash($_SERVER['HTTP_USER_AGENT'])) : '';
71	$tag .= 'var wpo_server_info_css = ' . wp_json_encode(array("user_agent" => $user_agent)) . "\n";
72
73	$exclude_css_from_page_speed_tools = $wpo_minify_options['exclude_css_from_page_speed_tools'];
74	if ($exclude_css_from_page_speed_tools) {
75	$tag .= 'if (!(navigator.userAgent + " " + wpo_server_info_css.user_agent).match(/'.implode('\|', $wpo_minify_options['ualist']).'/i)){' . "\n";
76	}
77	$tag .= ' var '.$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";
78	if ($exclude_css_from_page_speed_tools) {
79	$tag .= '}';
80	}
81	$tag .= '</script>' . "\n";
82	echo $tag; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- Output is already escaped
83	}
84
85	/**
86	* Inline a single style
87	*
88	* @param string $handle
89	* @param string $href
90	* @return boolean
91	*/
92	public static function inline_style($handle, $href) {
93	$wpo_minify_options = wp_optimize_minify_config()->get();
94
95	// font awesome processing, inline
96	// download, minify, cache
97	$tkey = 'css-'.hash('adler32', $href).'.css';
98	$json = WP_Optimize_Minify_Cache_Functions::get_transient($tkey);
99	if (false === $json) {
100	$json = WP_Optimize_Minify_Functions::download_and_minify($href, null, $wpo_minify_options['enable_css_minification'], 'css', $handle);
101	if ($wpo_minify_options['debug']) {
102	echo "<!-- wpo_min DEBUG: Uncached file processing now for " . esc_html($href) . " -->" . "\n";
103	}
104	WP_Optimize_Minify_Cache_Functions::set_transient($tkey, $json);
105	}
106
107	// decode
108	$res = json_decode($json, true);
109
110	// add font-display
111	// https://developers.google.com/web/updates/2016/02/font-display
112	$res['code'] = str_ireplace('font-style:normal;', 'font-display:block;font-style:normal;', $res['code']);
113
114	// inline css or fail
115	if ($res['status']) {
116	echo '<style type="text/css" media="all">' . "\n";
117	echo $res['code'] . "\n"; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- This is already escaped
118	echo '</style>' . "\n";
119	return true;
120	} else {
121	return false;
122	}
123	}
124
125	/**
126	* Print a normal style tag pointing the href
127	*
128	* @param string $href
129	* @return void
130	*/
131	public static function style($href) {
132	echo '<link rel="stylesheet" href="'.esc_url($href).'" media="all">' . "\n"; // phpcs:ignore WordPress.WP.EnqueuedResources.NonEnqueuedStylesheet -- Not applicable here
133	}
134
135	/**
136	* Write header
137	*
138	* @param string $file
139	* @param string $headers
140	* @return void
141	*/
142	public static function write_header($file, $headers) {
143	file_put_contents($file, $headers);
144	WP_Optimize_Minify_Cache_Functions::fix_permission_bits($file);
145	}
146
147	/**
148	* Write CSS
149	*
150	* @param string $file
151	* @param string $code
152	* @param array $log
153	* @return void
154	*/
155	public static function write_combined_asset($file, $code, $log) {
156	file_put_contents($file.'.json', wp_json_encode($log));
157	file_put_contents($file, $code);
158	// permissions
159	WP_Optimize_Minify_Cache_Functions::fix_permission_bits($file.'.json');
160	WP_Optimize_Minify_Cache_Functions::fix_permission_bits($file);
161
162	if (function_exists('gzencode')) {
163	file_put_contents($file.'.gz', gzencode(file_get_contents($file), 9));
164	WP_Optimize_Minify_Cache_Functions::fix_permission_bits($file.'.gz');
165	}
166
167	// brotli static support
168	if (function_exists('brotli_compress')) {
169	file_put_contents($file.'.br', brotli_compress(file_get_contents($file), 11));
170	WP_Optimize_Minify_Cache_Functions::fix_permission_bits($file.'.br');
171	}
172	}
173	/**
174	* Load async scripts with callback
175	*
176	* @return void
177	*/
178	public static function add_load_async() {
179	$min_or_not_internal = WP_Optimize()->get_min_or_not_internal_string();
180	$contents = file_get_contents(trailingslashit(WPO_PLUGIN_MAIN_PATH) . "js/loadAsync$min_or_not_internal.js");
181	echo "<script>$contents</script>\n"; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- Output is already escaped
182	}
183
184	/**
185	* Defer CSS globally from the header (order matters)
186	* Dev: https://www.filamentgroup.com/lab/async-css.html
187	*
188	* @return void
189	*/
190	public static function add_load_css() {
191	$min_or_not_internal = WP_Optimize()->get_min_or_not_internal_string();
192	$contents = file_get_contents(trailingslashit(WPO_PLUGIN_MAIN_PATH) . "js/loadCSS$min_or_not_internal.js");
193	echo "<script>$contents</script>" . "\n"; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- Output is already escaped
194	}
195	}
196