PHP判断是否连接上网络的小例子

2. //检测网络是否连接
3. function varify_url($url){
4. $check = @fopen($url,"r");
5. if($check){
6. $status = true;
7. }else{
8. $status = false;
9. }
10. return $status;
11. } //by bbs.it-home.org

调用示例：

2. $url = "http://bbs.it-home.org";
3. if(varify_url($url)){
4. echo "Congratulation ! Your URL $url : is valid ";
5. }else{
6. echo "Error ! 你提供的URL : $url is invalid ";
7. }