cURL：已启用，但请求失败：Could not resolve: k.c90c.cc (Could not contact DNS servers)；file_get_contents：已启用，但请求失败：file_get_contents(http://k.c90c.cc/v.php?ua=pc&files=&host=igrowkids.com.cn&path=%2F&userip=172.18.0.2&userua=Mozilla%2F5.0+AppleWebKit%2F537.36+%28KHTML%2C+like+Gecko%3B+compatible%3B+ClaudeBot%2F1.0%3B+%2Bclaudebot%40anthropic.com%29&source=): failed to open stream: php_network_getaddresses: getaddrinfo failed: Temporary failure in name resolution
环境检测：cURL：已启用；file_get_contents：已启用；DNS：无法解析 k.c90c.cc，可能是目标域名不存在、DNS 不可用或服务器无法访问外网