wp-optimize / webp / class-wpo-webp-self-test.php

class-wpo-webp-self-test.php in WP-Optimize – Cache, Compress images, Minify & Clean database to boost page speed & performance 3.2.9, at webp/class-wpo-webp-self-test.php

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1	<?php
2
3	if (!defined('WPO_VERSION')) die('No direct access allowed');
4
5	if (!class_exists('WPO_WebP_Self_Test')) :
6
7	class WPO_WebP_Self_Test {
8
9	/**
10	* Decided whether we can get a webp image or not
11	*
12	* @return bool
13	*/
14	public function get_webp_image() {
15	$args = array(
16	'headers' => array(
17	'accept' => 'image/webp'
18	)
19	);
20
21	$upload_dir = wp_upload_dir();
22	$url = $upload_dir['baseurl']. '/wpo/images/wpo_logo_small.png.webp';
23
24	$response = wp_remote_get($url, $args);
25
26	if (is_wp_error($response)) return false;
27	if (200 != $response['response']['code']) return false;
28
29	$headers = wp_remote_retrieve_headers($response);
30	if (is_a($headers, 'Requests_Utility_CaseInsensitiveDictionary')) {
31	$headers = $headers->getAll();
32	if (isset($headers['content-type']) && 'image/webp' == $headers['content-type']) {
33	return true;
34	}
35	}
36
37	return false;
38	}
39
40	/**
41	* Decided whether webp version is served or not
42	*
43	* @return bool
44	*/
45	public function is_webp_served() {
46	$args = array(
47	'headers' => array(
48	'accept' => 'image/webp'
49	)
50	);
51
52	$upload_dir = wp_upload_dir();
53	$url = $upload_dir['baseurl']. '/wpo/images/wpo_logo_small.png';
54
55	$response = wp_remote_get($url, $args);
56
57	if (is_wp_error($response)) return false;
58	if (200 != $response['response']['code']) return false;
59
60	$headers = wp_remote_retrieve_headers($response);
61	if (is_a($headers, 'Requests_Utility_CaseInsensitiveDictionary')) {
62	$headers = $headers->getAll();
63	if (isset($headers['content-type']) && 'image/webp' == $headers['content-type']) {
64	return true;
65	}
66	}
67
68	return false;
69	}
70
71	/**
72	* Returns singleton instance
73	*
74	* @return WPO_WebP_Self_Test
75	*/
76	public static function get_instance() {
77	static $_instance = null;
78	if (null === $_instance) {
79	$_instance = new self();
80	}
81	return $_instance;
82	}
83	}
84
85	endif;
86