← All changes | webp/class-wpo-webp-self-test.php +34 -19 3.3.1 → 4.7.0 View file →

		@@ -1,7 +1,7 @@
1	1	<?php
2	2
3		-if (!defined('WPO_VERSION')) die('No direct access allowed');
	3	+if (!defined('ABSPATH')) die('No direct access allowed');
4	4
5	5	if (!class_exists('WPO_WebP_Self_Test')) :
6	6
7	7	class WPO_WebP_Self_Test {
		@@ -6,55 +6,70 @@
6	6
7	7	class WPO_WebP_Self_Test {
8	8
9	9	/**
10		- * Determines whether content type header has webp mime or not
	10	+ * Relative path to the test image used for WebP serving verification.
11	11	*
12		- * @param array $headers An array of headers
	12	+ * @var string
	13	+ */
	14	+ const TEST_IMAGE_PATH = '/wpo/images/wpo_logo_small.png';
	15	+
	16	+ /**
	17	+ * The MIME type for WebP images, used as the Accept header value
	18	+ * and for content-type verification.
13	19	*
	20	+ * @var string
	21	+ */
	22	+ const WEBP_MIME_TYPE = 'image/webp';
	23	+
	24	+ /**
	25	+ * Determines whether the content-type header indicates a WebP image.
	26	+ *
	27	+ * @param array<string, string> $headers An array of response headers
	28	+ *
14	29	* @return bool
15	30	*/
16		- private function has_webp_mime($headers) {
17		- return isset($headers['content-type']) && 0 === strcasecmp('image/webp', $headers['content-type']);
	31	+ private function has_webp_mime($headers): bool {
	32	+ return isset($headers['content-type']) && 0 === strcasecmp(self::WEBP_MIME_TYPE, $headers['content-type']);
18	33	}
19	34
20	35	/**
21		- * Determines whether headers has `vary` header or not
	36	+ * Determines whether the Vary header includes Accept.
22	37	*
23		- * @param array $headers An array of headers
	38	+ * @param array<string, string> $headers An array of response headers
24	39	*
25	40	* @return bool
26	41	*/
27		- private function has_vary($headers) {
	42	+ private function has_vary($headers): bool {
28	43	return isset($headers['vary']) && preg_match('/accept/i', $headers['vary']);
29	44	}
30	45
31	46	/**
32		- * Decided whether webp version is served or not
	47	+ * Determines whether a WebP version is served when requested with
	48	+ * an appropriate Accept header.
33	49	*
34	50	* @return bool
35	51	*/
36		- public function is_webp_served() {
	52	+ public function is_webp_served(): bool {
37	53	$args = array(
38	54	'headers' => array(
39		- 'accept' => 'image/webp'
	55	+ 'accept' => self::WEBP_MIME_TYPE
40	56	)
41	57	);
42	58
43	59	$upload_dir = wp_upload_dir();
44		- $url = $upload_dir['baseurl']. '/wpo/images/wpo_logo_small.png';
	60	+ $url = $upload_dir['baseurl'] . self::TEST_IMAGE_PATH;
45	61
46	62	$response = wp_remote_head($url, $args);
47	63
48		- if (is_wp_error($response)) return false;
49		- if (200 != $response['response']['code']) return false;
	64	+ if (is_wp_error($response) || 200 !== $response['response']['code']) {
	65	+ return false;
	66	+ }
50	67
51	68	$headers = wp_remote_retrieve_headers($response);
52		- if (method_exists($headers, 'getAll')) {
	69	+ if (is_object($headers) && method_exists($headers, 'getAll')) {
53	70	$headers = $headers->getAll();
54		- if ($this->has_webp_mime($headers) && $this->has_vary($headers)) {
55		- return true;
56		- }
	71	+ return $this->has_webp_mime($headers) && $this->has_vary($headers);
57	72	}
58	73	return false;
59	74	}
60	75
		@@ -62,9 +77,9 @@
62	77	* Returns singleton instance
63	78	*
64	79	* @return WPO_WebP_Self_Test
65	80	*/
66		- public static function get_instance() {
	81	+ public static function get_instance(): self {
67	82	static $_instance = null;
68	83	if (null === $_instance) {
69	84	$_instance = new self();
70	85	}