wp-optimize / webp / class-wpo-webp-utils.php

class-wpo-webp-utils.php in WP-Optimize – Cache, Compress images, Minify & Clean database to boost page speed & performance 4.5.2, at webp/class-wpo-webp-utils.php

111 lines 3.3 KB

Raw Download Zip

1	<?php
2
3	if (!defined('ABSPATH')) die('No direct access allowed');
4
5	use \WebPConvert\Convert\ConverterFactory;
6
7	require_once WPO_PLUGIN_MAIN_PATH . 'vendor/autoload.php';
8
9	if (!class_exists('WPO_WebP_Utils')) :
10
11	class WPO_WebP_Utils {
12
13	/**
14	* Determines whether we can do webp conversion or not
15	*
16	* @return bool
17	*/
18	public static function can_do_webp_conversion() {
19	$webp_conversion = WP_Optimize()->get_options()->get_option('webp_conversion');
20	$webp_converters = WP_Optimize()->get_options()->get_option('webp_converters');
21	return $webp_conversion && !empty($webp_converters);
22	}
23
24	/**
25	* Convert given image file to webp format
26	*
27	* @param string $source Path of image file
28	*
29	* @return void
30	*/
31	public static function do_webp_conversion($source) {
32	$webp_converter = new WPO_WebP_Convert();
33	$webp_converter->convert($source);
34	}
35
36	/**
37	* Converts an image to WebP format using a specified converter.
38	*
39	* This method acts as a wrapper for the `WebPConvert\Convert\Converters\AbstractConverter::doConvert()` method
40	* from the `webp-convert` library.
41	*
42	* @param string $converter The converter to be used for the conversion process.
43	* @param string $source The path to the source image file.
44	* @param string $destination The path to the destination WebP image file.
45	*/
46	public static function perform_webp_conversion($converter, $source, $destination) {
47	$converter_instance = ConverterFactory::makeConverter(
48	$converter,
49	$source,
50	$destination
51	);
52
53	set_error_handler(array(__CLASS__, 'handle_webp_conversion_warnings'), E_WARNING); // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_set_error_handler -- This is needed in order to suppress PHP warnings thrown by third party library
54
55	$converter_instance->doConvert();
56
57	restore_error_handler();
58	}
59
60	/**
61	* Custom error handler for handling PHP warnings during the WebP conversion process.
62	*
63	* @param int $errno The level of the error raised, as an integer.
64	* @param string $errstr The error message.
65	*
66	* @return bool
67	*/
68	public static function handle_webp_conversion_warnings($errno, $errstr) {
69	$patterns = array(
70	'/unlink$.+$: No such file or directory/',
71	'/rename$.+$: No such file or directory/',
72	'/filesize: stat failed for/',
73	);
74
75	foreach ($patterns as $pattern) {
76	if (preg_match($pattern, $errstr)) {
77	// Suppress the warning by returning true
78	return true;
79	}
80	}
81
82	// For other PHP warnings, use the default PHP error handler by returning false
83	return false;
84	}
85
86	/**
87	* Decide whether the browser requesting the URL can accept webp images or not
88	*
89	* @return bool
90	*/
91	public static function is_browser_accepting_webp() {
92	$http_accept = TeamUpdraft\WP_Optimize\Includes\Fragments\fetch_superglobal('server', 'HTTP_ACCEPT', 'string', 'sanitize_text_field', '');
93	if (false !== strpos($http_accept, 'image/webp')) {
94	return true;
95	}
96
97	// Link to compatibility site - https://caniuse.com/webp
98	$user_agent = TeamUpdraft\WP_Optimize\Includes\Fragments\fetch_superglobal('server', 'HTTP_USER_AGENT', 'string', 'sanitize_text_field', '');
99	if (empty($user_agent)) return false;
100
101	// Check Firefox version number
102	if (preg_match('/Firefox\/([\d\.]+[a-z\d]*)/', $user_agent, $matches)) {
103	if (version_compare('65.0.0', $matches[1], '<=')) return true;
104	}
105
106	return false;
107	}
108	}
109
110	endif;
111