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 3.2.5, 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	WP_Optimize()->log('Checking if we can get webp image');
16	$args = array(
17	'headers' => array(
18	'accept' => 'image/webp'
19	)
20	);
21
22	$upload_dir = wp_upload_dir();
23	$url = $upload_dir['baseurl']. '/wpo/images/wpo_logo_small.png.webp';
24
25	$response = wp_remote_get($url, $args);
26
27	if (is_wp_error($response)) return false;
28	if (200 != $response['response']['code']) return false;
29
30	$headers = wp_remote_retrieve_headers($response);
31	if (is_a($headers, 'Requests_Utility_CaseInsensitiveDictionary')) {
32	$headers = $headers->getAll();
33	if (isset($headers['content-type']) && 'image/webp' == $headers['content-type']) {
34	return true;
35	}
36	}
37
38	return false;
39	}
40
41	/**
42	* Decided whether webp version is served or not
43	*
44	* @return bool
45	*/
46	public function is_webp_served() {
47	$args = array(
48	'headers' => array(
49	'accept' => 'image/webp'
50	)
51	);
52
53	$upload_dir = wp_upload_dir();
54	$url = $upload_dir['baseurl']. '/wpo/images/wpo_logo_small.png';
55
56	$response = wp_remote_get($url, $args);
57
58	if (is_wp_error($response)) return false;
59	if (200 != $response['response']['code']) return false;
60
61	$headers = wp_remote_retrieve_headers($response);
62	if (is_a($headers, 'Requests_Utility_CaseInsensitiveDictionary')) {
63	$headers = $headers->getAll();
64	if (isset($headers['content-type']) && 'image/webp' == $headers['content-type']) {
65	return true;
66	}
67	}
68
69	return false;
70	}
71
72	/**
73	* Returns singleton instance
74	*
75	* @return WPO_WebP_Self_Test
76	*/
77	public static function get_instance() {
78	static $_instance = null;
79	if (null === $_instance) {
80	$_instance = new self();
81	}
82	return $_instance;
83	}
84	}
85
86	endif;
87