详解PHP fsockopen的使用方法(获取页面的头信息)
1.PHP fsockopen函数说明:
Open Internet or Unix domain socket connection(打开套接字链接)
Initiates a socket connection to the resource specified by target .
fsockopen() returns a file pointer which may be used together with the other file functions (such as fgets() , fgetss() , fwrite() , fclose() , and feof() ).就是返回一个文件句柄
开启PHP fsockopen这个函数
PHP fsockopen需要 PHP.ini 中 allow_url_fopen 选项开启。
- $fp = fsockopen("www.example.com",
80, $errno, $errstr, 30); - if (!$fp) {
- echo "$errstr ($errno)<br />/n";
- } else {
- $out = "GET / HTTP/1.1/r/n";
- $out .= "Host: www.example.com/r/n";
- $out .= "Connection: Close/r/n/r/n";
- fwrite($fp, $out);
- while (!feof($fp)) {
- echo fgets($fp, 128);
- }
- fclose($fp);
- }
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