Tích hợp xóa cache từ Cloudflare sử dụng TOken API, Zone id để dùng cho code PHP thuần hoặc WordPress

     // Zone_id of domain on cloudflare use to remove cache by cloudflare => get zone id by overview and scroll to nearly right footer
    "cf_zone_id" => "dfbbf0543xxxxxxxxxxxx0235501b969",  
    "cf_token" => "1-2HIE4IHfIJxxxxxxxxxxxkiUpnRpvQ",  

<?php
 
// lib/cf_cache_tags.php

/**
 * Gắn Cache-Tag + Cache-Control cho Cloudflare.
 * Cloudflare sẽ đọc Cache-Tag và remove header đó trước khi trả về client.
 */
function cf_set_cache_tags(array $tags, int $edgeTtlSeconds = 7200): void
{
    // normalize tags: trim, lowercase, bỏ rỗng, unique
    $clean = [];
    foreach ($tags as $t) {
        $t = strtolower(trim((string)$t));
        if ($t !== '') $clean[$t] = true;
    }
    $tags = array_keys($clean);

    if (!$tags) return;

    // Cache-Control cho CDN/browser (tuỳ mày chỉnh)
    // - s-maxage: dành cho shared cache/CDN
    // - max-age: browser
    header('Cache-Control: public, max-age=120, s-maxage=' . $edgeTtlSeconds);

    // Cache-Tag: tag1,tag2
    header('Cache-Tag: ' . implode(',', $tags));
}

/**
 * Helper build tag chuẩn hoá để purge theo logic.
 */
function cf_tags_home(): array
{
    return ['home', 'list'];
}

function cf_tags_category(int $catId): array
{
    return ['category', 'list', 'cat_' . $catId];
}

function cf_tags_post(int $postId): array
{
    return ['post', 'post_' . $postId];
}

	protected function homeindex(){
		global $mysql;
		global $conne;			
		Main::set("image",$this->config['url']."/themes/".$this->config['theme']."/images/logo_fb.png");
		Main::set("url", $this->config['url'].'/'.$_GET["a"]);
		$act_home='active';		
		include(ROOT.'/lib/cf_cache_tags.php');
		cf_set_cache_tags(cf_tags_home(), 7200); // edge 2h
		include(THEME."/header.php");
		include(THEME."/index.php");
		$this->footer();
	}

<?php // lib/cf_purge.php function cf_api_request(string $url, string $token, array $payload): array { $ch = curl_init($url); curl_setopt_array($ch, [ CURLOPT_RETURNTRANSFER => true,
        CURLOPT_POST => true,
        CURLOPT_HTTPHEADER => [
            'Authorization: Bearer ' . $token,
            'Content-Type: application/json',
        ],
        CURLOPT_POSTFIELDS => json_encode($payload, JSON_UNESCAPED_SLASHES),
        CURLOPT_TIMEOUT => 15,
    ]);

    $raw = curl_exec($ch);
    $err = curl_error($ch);
    $code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_close($ch);

    if ($raw === false) {
        return ['ok' => false, 'http' => $code, 'error' => $err ?: 'curl_error'];
    }

    $json = json_decode($raw, true);
    if (!is_array($json)) {
        return ['ok' => false, 'http' => $code, 'error' => 'invalid_json', 'raw' => $raw];
    }

    // Cloudflare trả { success: true/false, errors: [], ... }
    return [
        'ok' => (bool)($json['success'] ?? false),
        'http' => $code,
        'response' => $json,
    ];
}

/**
 * Purge theo Cache-Tags
 * Cloudflare limit max operations/request thường là 100. :contentReference[oaicite:2]{index=2}
 */
function cf_purge_by_tags(string $zoneId, string $token, array $tags): array
{
    $tags = array_values(array_unique(array_filter(array_map('trim', $tags))));
    if (!$tags) return ['ok' => true, 'http' => 0, 'response' => ['success' => true, 'skipped' => true]];

    // chia batch 100 tags/request cho chắc
    $results = [];
    foreach (array_chunk($tags, 100) as $batch) {
        $url = "https://api.cloudflare.com/client/v4/zones/{$zoneId}/purge_cache";
        $results[] = cf_api_request($url, $token, ['tags' => $batch]);
    }
    return ['ok' => true, 'batches' => $results];
}

/**
 * Purge theo URL (khi thật sự cần “đúng 1 trang”)
 */
function cf_purge_by_urls(string $zoneId, string $token, array $urls): array
{
    $urls = array_values(array_unique(array_filter(array_map('trim', $urls))));
    if (!$urls) return ['ok' => true, 'http' => 0, 'response' => ['success' => true, 'skipped' => true]];

    foreach ($urls as &$u) {
        // Nếu mày truyền path "/abc" thì tự ghép domain ở nơi gọi cho chắc
        // Ở đây assume full URL
    }

    $url = "https://api.cloudflare.com/client/v4/zones/{$zoneId}/purge_cache";
    return cf_api_request($url, $token, ['files' => $urls]);
}

function cf_purge_everything($zoneId, $token)
{
    $url = "https://api.cloudflare.com/client/v4/zones/$zoneId/purge_cache";

    $ch = curl_init($url);
    curl_setopt_array($ch, [
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_POST => true,
        CURLOPT_HTTPHEADER => [
            "Authorization: Bearer $token",
            "Content-Type: application/json",
        ],
        CURLOPT_POSTFIELDS => json_encode([
            "purge_everything" => true
        ]),
        CURLOPT_TIMEOUT => 15,
    ]);

    $res = curl_exec($ch);
    curl_close($ch);

    return json_decode($res, true);
}

 protected function cf_clear(){	

	//require_once __DIR__ . '/lib/cf_purge.php';
	//require_once __DIR__ . '/lib/cf_cache_tags.php';
	include(ROOT."/lib/cf_purge.php");
	include(ROOT."/lib/cf_cache_tags.php");
	$CF_ZONE_ID = $this->config['cf_zone_id'];   // hoặc define trong config riêng
	$CF_TOKEN   = $this->config['cf_token']; // token quyền "Cache Purge" cho zone
	$tagsToPurge = [];

	$tagsToPurge[] = 'home';
	$tagsToPurge[] = 'list';

	/*if (!empty($catId)) {
		$tagsToPurge[] = 'cat_'.$catId;
	}
	*/

	$tagsToPurge = array_values(array_unique($tagsToPurge));
	//$xoa_theo_tag_chi_dinh= cf_purge_by_tags($CF_ZONE_ID, $CF_TOKEN, $tagsToPurge);
	$xoa_full_cache_domain= cf_purge_everything($CF_ZONE_ID, $CF_TOKEN);
	print_r($xoa_full_cache_domain);


}