class-server-utils.php — Smush – Image Optimization, Compression, Lazy Load, WebP & CDN 4.1.0

wp-smushit / core / class-server-utils.php

wp-smushit / core Last commit date

class-server-utils.php

238 lines

1	<?php
2
3	namespace Smush\Core;
4
5	class Server_Utils {
6	private static $firefox_agent = '#Firefox/(?<version>[0-9]{2,})#i';
7	private static $ipad_iphone_agent = '#(?:iPad\|iPhone)(.*)Version/(?<version>[0-9]{2,})#i';
8	private static $safari_agent = '#Version/(?<version>[0-9]{2,})(?:.*)Safari#i';
9	private static $msie_trident = '/MSIE\|Trident/i';
10	/**
11	* @var string
12	*/
13	private $mysql_version;
14
15	private function browser_webp_support() {
16	return array(
17	self::$firefox_agent => array( 'version' => 66, 'operator' => '>' ),
18	self::$ipad_iphone_agent => array( 'version' => 14, 'operator' => '>=' ),
19	self::$safari_agent => array( 'version' => 14, 'operator' => '>=' ),
20	self::$msie_trident => false,
21	);
22	}
23
24	public function get_server_type() {
25	if ( empty( $_SERVER['SERVER_SOFTWARE'] ) ) {
26	return '';
27	}
28
29	$server_software = wp_unslash( $_SERVER['SERVER_SOFTWARE'] );
30	if ( ! is_array( $server_software ) ) {
31	$server_software = array( $server_software );
32	}
33
34	$server_software = array_map( 'strtolower', $server_software );
35	$is_nginx = $this->array_has_needle( $server_software, 'nginx' );
36	if ( $is_nginx ) {
37	return 'nginx';
38	}
39
40	$is_apache = $this->array_has_needle( $server_software, 'apache' );
41	if ( $is_apache ) {
42	return 'apache';
43	}
44
45	return '';
46	}
47
48	public function get_memory_limit() {
49	if ( function_exists( 'ini_get' ) ) {
50	$memory_limit = ini_get( 'memory_limit' );
51	} else {
52	// Sensible default.
53	$memory_limit = '128M';
54	}
55
56	if ( ! $memory_limit \|\| - 1 === (int) $memory_limit ) {
57	// Unlimited, set to 32GB.
58	$memory_limit = '32000M';
59	}
60
61	return intval( $memory_limit ) * 1024 * 1024;
62	}
63
64	public function get_memory_usage() {
65	return memory_get_usage( true );
66	}
67
68	private function array_has_needle( $array, $needle ) {
69	foreach ( $array as $item ) {
70	if ( strpos( $item, $needle ) !== false ) {
71	return true;
72	}
73	}
74
75	return false;
76	}
77
78	public function get_mysql_version() {
79	if ( ! $this->mysql_version ) {
80	global $wpdb;
81	/**
82	* MariaDB version prefix 5.5.5- is not stripped when using $wpdb->db_version() to get the DB version:
83	* https://github.com/php/php-src/issues/7972
84	*/
85	$this->mysql_version = $wpdb->get_var( 'SELECT VERSION()' );
86	}
87	return $this->mysql_version;
88	}
89
90	public function get_max_execution_time() {
91	return (int) ini_get( 'max_execution_time' );
92	}
93
94	public function get_user_agent() {
95	return ! empty( $_SERVER['HTTP_USER_AGENT'] ) ? wp_unslash( $_SERVER['HTTP_USER_AGENT'] ) : '';
96	}
97
98	public function get_document_root() {
99	return ! empty( $_SERVER['DOCUMENT_ROOT'] ) ? wp_unslash( $_SERVER['DOCUMENT_ROOT'] ) : '';
100	}
101
102	public function get_http_accept_header() {
103	if ( ! empty( $_SERVER['HTTP_ACCEPT'] ) ) {
104	return wp_unslash( $_SERVER['HTTP_ACCEPT'] );
105	}
106
107	if ( function_exists( 'apache_request_headers' ) ) {
108	$headers = apache_request_headers();
109	if ( ! empty( $headers['Accept'] ) ) {
110	return $headers['Accept'];
111	}
112	}
113
114	return '';
115	}
116
117	public function browser_supports_nextgen_format( $format ) {
118	$http_accept = $this->get_http_accept_header();
119	return ! empty( $http_accept ) && false !== strpos( $http_accept, $format );
120	}
121
122	public function browser_supports_webp() {
123	$http_accept = $this->get_http_accept_header();
124	if ( ! empty( $http_accept ) && false !== strpos( $http_accept, 'webp' ) ) {
125	return true;
126	}
127
128	return $this->check_user_agent_version( $this->browser_webp_support() );
129	}
130
131	private function check_user_agent_version( $allowed, $default = false ) {
132	$user_agent = $this->get_user_agent();
133
134	foreach ( $allowed as $user_agent_regex => $data ) {
135	$version = isset( $data['version'] ) ? $data['version'] : 0;
136	$operator = isset( $data['operator'] ) ? $data['operator'] : '';
137
138	$matches = array();
139	if ( preg_match( $user_agent_regex, $user_agent, $matches ) ) {
140	if ( $version && $operator && $matches['version'] ) {
141	return version_compare( (int) $matches['version'], $version, $operator );
142	} else {
143	return $data;
144	}
145	}
146	}
147
148	return $default;
149	}
150
151	public function get_request_uri() {
152	return rawurldecode( sanitize_text_field( wp_unslash( $_SERVER['REQUEST_URI'] ) ) );
153	}
154
155	public function get_current_url() {
156	$protocol = is_ssl() ? 'https:' : 'http:';
157	$domain = wp_parse_url( site_url(), PHP_URL_HOST );
158	$path = wp_parse_url( $this->get_request_uri(), PHP_URL_PATH );
159	$query = wp_parse_url( $this->get_request_uri(), PHP_URL_QUERY );
160
161	$url = $protocol . '//' . $domain . $path;
162
163	if ( $query ) {
164	$url .= '?' . $query;
165	}
166
167	return $url;
168	}
169
170	public function get_request_method() {
171	if ( empty( $_SERVER['REQUEST_METHOD'] ) ) {
172	return '';
173	}
174	return strtoupper( sanitize_text_field( wp_unslash( $_SERVER['REQUEST_METHOD'] ) ) );
175	}
176
177	public function get_device_type() {
178	if ( ! $this->is_mobile() ) {
179	return 'desktop';
180	}
181
182	if ( $this->is_tablet() ) {
183	return 'tablet';
184	}
185
186	return 'mobile';
187	}
188
189	private function is_tablet() {
190	$user_agent = $this->get_user_agent();
191	if ( empty( $user_agent ) ) {
192	return false;
193	}
194	/**
195	* It doesn't work with IpadOS due to this:
196	* https://stackoverflow.com/questions/62323230/how-can-i-detect-with-php-that-the-user-uses-an-ipad-when-my-user-agent-doesnt-c
197	*/
198	$tablet_pattern = '/(tablet\|ipad\|playbook\|kindle\|silk)/i';
199	return preg_match( $tablet_pattern, $user_agent );
200	}
201
202	private function is_mobile() {
203	$user_agent = $this->get_user_agent();
204	if ( empty( $user_agent ) ) {
205	return false;
206	}
207	// Do not use wp_is_mobile() since it doesn't detect ipad/tablet.
208	$mobile_patten = '/Mobile\|iP(hone\|od\|ad)\|Android\|BlackBerry\|tablet\|IEMobile\|Kindle\|NetFront\|Silk\|(hpw\|web)OS\|Fennec\|Minimo\|Opera M(obi\|ini)\|Blazer\|Dolfin\|Dolphin\|Skyfire\|Zune\|playbook/i';
209	return preg_match( $mobile_patten, $user_agent );
210	}
211
212	public function is_function_supported( $function_name ) {
213	if ( ! function_exists( $function_name ) ) {
214	return false;
215	}
216
217	$disabled_functions = explode( ',', ini_get( 'disable_functions' ) );
218	if ( in_array( $function_name, $disabled_functions ) ) {
219	return false;
220	}
221
222	return true;
223	}
224
225	public function curl_multi_exec_available() {
226	if ( ! function_exists( 'curl_multi_exec' ) ) {
227	return false;
228	}
229
230	$disabled_functions = explode( ',', ini_get( 'disable_functions' ) );
231	if ( in_array( 'curl_multi_exec', $disabled_functions ) ) {
232	return false;
233	}
234
235	return true;
236	}
237	}
238