想從學校圖書館的網站上抓取數據處理之后在返回給瀏覽器，試了不少方法。首先試了http_request()，但是這個學院pecl_http支持，后來又試了網上流傳甚廣的class HttpRequest，可能是我不會使用，也失敗了。后來看到了函數httpRequest($url, $post='', $method='GET', $limit=0, $returnHeader=FALSE, $cookie='', $bysocket=FALSE, $ip='', $timeout=15, $block=TRUE)，用它成功了，因此貼出來分享一下。函數代碼如下：

/**

* Respose A Http Request

*

* @param string $url

* @param array $post

* @param string $method

* @param bool $returnHeader

* @param string $cookie

* @param bool $bysocket

* @param string $ip

* @param integer $timeout

* @param bool $block

* @return string Response

*/

function httpRequest($url,$post='',$method='GET',$limit=0,$returnHeader=FALSE,$cookie='',$bysocket=FALSE,$ip='',$timeout=15,$block=TRUE) {

$return = '';

$matches = parse_url($url);

!isset($matches['host']) && $matches['host'] = '';

!isset($matches['path']) && $matches['path'] = '';

!isset($matches['query']) && $matches['query'] = '';

!isset($matches['port']) && $matches['port'] = '';

$host = $matches['host'];

$path = $matches['path'] ? $matches['path'].($matches['query'] ? '?'.$matches['query'] : '') : '/';

$port = !empty($matches['port']) ? $matches['port'] : 80;

if(strtolower($method) == 'post') {

$post = (is_array($post) and !empty($post)) ? http_build_query($post) : $post;

$out = "POST $path HTTP/1.0\r\n";

$out .= "Accept: */*\r\n";

//$out .= "Referer: $boardurl\r\n";

$out .= "Accept-Language: zh-cn\r\n";

$out .= "Content-Type: application/x-www-form-urlencoded\r\n";

$out .= "User-Agent: $_SERVER[HTTP_USER_AGENT]\r\n";

$out .= "Host: $host\r\n";

$out .= 'Content-Length: '.strlen($post)."\r\n";

$out .= "Connection: Close\r\n";

$out .= "Cache-Control: no-cache\r\n";

$out .= "Cookie: $cookie\r\n\r\n";

$out .= $post;

} else {

$out = "GET $path HTTP/1.0\r\n";

$out .= "Accept: */*\r\n";

//$out .= "Referer: $boardurl\r\n";

$out .= "Accept-Language: zh-cn\r\n";

$out .= "User-Agent: $_SERVER[HTTP_USER_AGENT]\r\n";

$out .= "Host: $host\r\n";

$out .= "Connection: Close\r\n";

$out .= "Cookie: $cookie\r\n\r\n";

}

$fp = fsockopen(($ip ? $ip : $host), $port, $errno, $errstr, $timeout);

if(!$fp) return ''; else {

$header = $content = '';

stream_set_blocking($fp, $block);

stream_set_timeout($fp, $timeout);

fwrite($fp, $out);

$status = stream_get_meta_data($fp);

if(!$status['timed_out']) {//未超時

while (!feof($fp)) {

$header .= $h = fgets($fp);

if($h && ($h == "\r\n" || $h == "\n")) break;

}

$stop = false;

while(!feof($fp) && !$stop) {

$data = fread($fp, ($limit == 0 || $limit > 8192 ? 8192 : $limit));

$content .= $data;

if($limit) {

$limit -= strlen($data);

$stop = $limit <= 0;

}

}

}

fclose($fp);

return $returnHeader ? array($header,$content) : $content;

}

}

?>

調用也很簡單的。簡單的例子：

echo httpRequest('http://www.baidu.com');

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