<?php
/**
* Class and methods to start an HTML buffer for parsing by other classes.
*
* @link https://ewww.io/swis/
* @package SWIS_Performance
*/
namespace SWIS;
if ( ! defined( 'ABSPATH' ) ) {
exit;
}
/**
* Enables plugin to filter HTML through a variety of functions.
*/
class Buffer {
/**
* Register hook function to startup buffer.
*/
function __construct() {
add_action( 'template_redirect', array( $this, 'buffer_start' ) );
}
/**
* Starts an output buffer and registers the callback function to do HTML parsing.
*/
function buffer_start() {
ob_start( array( $this, 'filter_page_output' ) );
}
/**
* Parse page content through filter functions.
*
* @param string $buffer The HTML content to parse.
* @return string The filtered HTML content.
*/
function filter_page_output( $buffer ) {
return apply_filters( 'swis_filter_page_output', $buffer );
}
}