solid-performance / src / Performance / Page_Cache / Buffer.php

Buffer.php in Solid Performance – Your No-Code Caching, Performance, & Page Speed Solution 1.8.0, at src/Performance/Page_Cache/Buffer.php

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1	<?php
2	/**
3	* The class responsible for collecting and storing fully rendered pages.
4	*
5	* @since 0.1.0
6	*
7	* @package SolidWP\Performance
8	*/
9
10	namespace SolidWP\Performance\Page_Cache;
11
12	if ( ! defined( 'ABSPATH' ) ) {
13	exit;
14	}
15
16	/**
17	* A class for collecting and storing rendered pages.
18	*
19	* @since 0.1.0
20	*
21	* @package SolidWP\Performance
22	*/
23	class Buffer {
24
25	/**
26	* An instance of Cache.
27	*
28	* @since 0.1.0
29	*
30	* @var Cache
31	*/
32	private Cache $cache;
33
34	/**
35	* The class constructor.
36	*
37	* @since 0.1.0
38	*
39	* @param Cache $cache An instance of Page_Cache\Cache.
40	*/
41	public function __construct( Cache $cache ) {
42	$this->cache = $cache;
43	}
44
45	/**
46	* Registers the callback with Output Buffering.
47	*
48	* @since 0.1.0
49	*
50	* @return void
51	*/
52	public function register(): void {
53	ob_start( [ $this, 'handle' ] );
54	}
55
56	/**
57	* The callback registered in the Output Buffer to save response.
58	*
59	* @since 0.1.0
60	*
61	* @param string $buffer The output created for the request.
62	*
63	* @see https://www.php.net/manual/en/function.ob-start.php
64	*
65	* @return string
66	*/
67	public function handle( string $buffer ): string {
68	// This only fires on front-end requests.
69	$count = did_action( 'template_redirect' );
70
71	if (
72	$count <= 0 \|\|
73	strlen( $buffer ) <= 0
74	) {
75	return $buffer;
76	}
77
78	/**
79	* Filter the HTML markup before rendering/saving it.
80	*
81	* @param string $html The HTML markup that will be written to cache.
82	*/
83	$buffer = apply_filters( 'solidwp/performance/cache/html', $buffer );
84
85	$this->cache->save_output( $buffer );
86
87	return $buffer;
88	}
89	}
90