class-url-utils.php — Smush – Image Optimization, Compression, Lazy Load, WebP & CDN 3.23.4

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

wp-smushit / core Last commit date

class-url-utils.php

285 lines

1	<?php
2
3	namespace Smush\Core;
4
5	use Smush\Core\CDN\CDN_Helper;
6	use Smush\Core\Transform\Transformation_Controller;
7
8	class Url_Utils {
9	/**
10	* @var Upload_Dir
11	*/
12	private $upload_dir;
13
14	/**
15	* @var string
16	*/
17	private $content_url;
18
19	public function __construct() {
20	$this->upload_dir = new Upload_Dir();
21	}
22
23	public function get_extension( $url ) {
24	$path = wp_parse_url( $url, PHP_URL_PATH );
25	if ( empty( $path ) ) {
26	return false;
27	}
28
29	return strtolower( pathinfo( $path, PATHINFO_EXTENSION ) );
30	}
31
32	public function get_url_scheme( $url ) {
33	$url_parts = wp_parse_url( $url );
34
35	return empty( $url_parts['scheme'] )
36	? false
37	: $url_parts['scheme'];
38	}
39
40	/**
41	* @param $url
42	*
43	* @return string
44	* @see attachment_url_to_postid()
45	*/
46	public function make_media_url_relative( $url ) {
47	$upload_url = $this->upload_dir->get_upload_url();
48	$path = $url;
49
50	$site_url = parse_url( $upload_url );
51	$image_path = parse_url( $path );
52
53	// Force the protocols to match if needed.
54	if ( isset( $image_path['scheme'] ) && ( $image_path['scheme'] !== $site_url['scheme'] ) ) {
55	$path = str_replace( $image_path['scheme'], $site_url['scheme'], $path );
56	}
57
58	if ( str_starts_with( $path, $upload_url . '/' ) ) {
59	$path = substr( $path, strlen( $upload_url . '/' ) );
60	}
61
62	return $path;
63	}
64
65	public function guess_dimensions_from_image_url( $url ) {
66	$width_height_string = array();
67
68	if ( preg_match( '#-(\d+)x(\d+)\.(?:jpe?g\|png\|gif\|webp\|svg)#i', $url, $width_height_string ) ) {
69	$width = (int) $width_height_string[1];
70	$height = (int) $width_height_string[2];
71
72	if ( $width && $height ) {
73	return array( $width, $height );
74	}
75	}
76
77	return array( false, false );
78	}
79
80	public function get_query_vars( $url ) {
81	// Decode HTML entities in the URL.
82	$url = html_entity_decode( $url );
83
84	$parse_url = wp_parse_url( $url );
85	$query_vars = array();
86	if ( ! empty( $parse_url['query'] ) ) {
87	wp_parse_str( $parse_url['query'], $query_vars );
88	}
89
90	return $query_vars;
91	}
92
93	public function get_image_dimensions( $image_url ) {
94	$dimensions = apply_filters( 'wp_smush_get_image_dimensions', false, $image_url );
95	if ( $dimensions ) {
96	return $dimensions;
97	}
98
99	$image_url = apply_filters( 'wp_smush_get_image_dimensions_url', $image_url );
100
101	return $this->_get_image_dimensions( $image_url );
102	}
103
104	private function _get_image_dimensions( $image_url ) {
105	$default = array( false, false );
106
107	if ( empty( $image_url ) ) {
108	return $default;
109	}
110
111	list( $width, $height ) = $this->guess_dimensions_from_image_url( $image_url );
112
113	if ( ! empty( $width ) && ! empty( $height ) && $width > Transformation_Controller::get_min_transformable_image_dimension() ) {
114	return array( $width, $height );
115	}
116
117	if ( $this->is_external_url( $image_url ) ) {
118	if ( ! $this->should_fetch_external_image_dimensions( $image_url ) ) {
119	return $default;
120	}
121
122	if ( ! $this->url_has_200_response( $image_url ) ) {
123	return $default;
124	}
125
126	return $this->getimagesize( $image_url );
127	}
128
129	$local_path = $this->url_to_path( $image_url );
130	if ( ! $local_path \|\| ! file_exists( $local_path ) ) {
131	return $default;
132	}
133
134	return $this->getimagesize( $local_path );
135	}
136
137	public function get_url_content_type_header( $image_url ) {
138	// Use url headers to check content type
139	if ( $this->is_external_url( $image_url ) ) {
140	$headers = get_headers( $image_url, 1 );
141
142	if ( empty( $headers['content-type'] ) ) {
143	return false;
144	}
145
146	return $headers['content-type'];
147	} else {
148	return false;
149	}
150	}
151
152	private function should_fetch_external_image_dimensions( $image_url ) {
153	return ini_get( 'allow_url_fopen' ) && apply_filters( 'wp_smush_should_fetch_external_image_dimensions', false, $image_url );
154	}
155
156	private function getimagesize( $image_url ) {
157	$sizes = wp_getimagesize( $image_url );
158
159	if ( empty( $sizes ) ) {
160	return array( false, false );
161	}
162
163	return array( $sizes[0], $sizes[1] );
164	}
165
166	public function url_has_200_response( $url ) {
167	if ( ! $url \|\| ! ini_get( 'allow_url_fopen' ) ) {
168	return false;
169	}
170
171	$file_headers = get_headers( $url );
172
173	if ( empty( $file_headers[0] ) ) {
174	return false;
175	}
176
177	return false !== strstr( $file_headers[0], '200' );
178	}
179
180	public function is_external_url( $absolute_url ) {
181	if ( str_starts_with( $absolute_url, $this->get_content_url() ) ) {
182	return false;
183	}
184
185	if ( str_starts_with( $absolute_url, $this->upload_dir->get_upload_url() ) ) {
186	return false;
187	}
188
189	return true;
190	}
191
192	public function url_to_path( $absolute_url ) {
193	if ( str_starts_with( $absolute_url, $this->get_content_url() ) ) {
194	return str_replace( $this->get_content_url(), WP_CONTENT_DIR, $absolute_url );
195	}
196
197	$upload_url = $this->upload_dir->get_upload_url();
198	$upload_dir = $this->upload_dir->get_upload_path();
199
200	if ( str_starts_with( $absolute_url, $upload_url ) ) {
201	return str_replace( $upload_url, $upload_dir, $absolute_url );
202	}
203
204	return false;
205	}
206
207	private function get_content_url() {
208	if ( ! $this->content_url ) {
209	$this->content_url = content_url();
210	}
211
212	return $this->content_url;
213	}
214
215	/**
216	* Get full size image url from resized one.
217	*
218	* @param string $src Image URL.
219	*
220	* @return string
221	* @since 3.0
222	*
223	*/
224	public function get_url_without_dimensions( $src ) {
225	$extensions = array(
226	'gif',
227	'jpg',
228	'jpeg',
229	'png',
230	'webp',
231	);
232	if ( ! preg_match( '/(-\d+x\d+)\.(' . implode( '\|', $extensions ) . ')(?:\?.+)?$/i', $src, $src_parts ) ) {
233	return $src;
234	}
235
236	// Remove WP's resize string to get the original image.
237	$original_src = str_replace( $src_parts[1], '', $src );
238
239	// Extracts the file path to the image minus the base url.
240	$file_path = substr( $original_src, strlen( $this->upload_dir->get_upload_url() ) );
241
242	// Continue only if the file exists.
243	if ( file_exists( $this->upload_dir->get_upload_path() . $file_path ) ) {
244	return $original_src;
245	}
246
247	// Revert to source if file does not exist.
248	return $src;
249	}
250
251	/**
252	* Convert original image URL to scaled image URL.
253	*
254	* @param string $src Original image URL.
255	*
256	* @return string\|null
257	*/
258	public function get_scaled_image_url( $original_src ) {
259	if ( strpos( $original_src, '-scaled' ) !== false ) {
260	return $original_src;
261	}
262
263	$path_info = pathinfo( $original_src );
264	$scaled_filename = $path_info['filename'] . '-scaled.' . $path_info['extension'];
265	$scaled_src = str_replace( $path_info['basename'], $scaled_filename, $original_src );
266
267	$scaled_path = $this->url_to_path( $scaled_src );
268	if ( $scaled_path && file_exists( $scaled_path ) ) {
269	return $scaled_src;
270	}
271
272	return null;
273	}
274
275	public function normalize_url( $url ) {
276	$url = str_replace( array( 'http://', 'https://', 'www.' ), '', $url );
277
278	return untrailingslashit( $url );
279	}
280
281	public function is_relative( $url ) {
282	return ! empty( preg_match( '/^\./', $url ) ) \|\| empty( wp_parse_url( $url, PHP_URL_HOST ) );
283	}
284	}
285