php发送get、post请求的几种方法

方法1: 用file_get_contents 以get方式获取内容

$url='';
$html = file_get_contents($url);
echo $html;
?>

方法2: 用fopen打开url, 以get方式获取内容

$fp = fopen($url, 'r');
//返回请求流信息（数组：请求状态，阻塞，返回值是否为空，返回值http头等）

stream_get_meta_data($fp);

while(!feof($fp)) {
$result .= fgets($fp, 1024);
}
echo "url body: $result";
fclose($fp);
?>

方法3：用file_get_contents函数,以post方式获取url

$data = array ('foo' => 'bar');

//生成url-encode后的请求字符串，将数组转换为字符串
$data = http_build_query($data);
$opts = array (
"white-space:pre">  'http' => array (
"white-space:pre">      'method' => 'POST',
"white-space:pre">      'header'=> "Content-type: application/x-www-form-urlencoded\r\n" .
"white-space:pre">      "Content-Length: " . strlen($data) . "\r\n",
"white-space:pre">      'content' => $data
"white-space:pre">  )
);

//生成请求的句柄文件
$context = stream_context_create($opts);
$html = file_get_contents('', false, $context);
echo $html;
?>

方法4：用fsockopen函数打开url，以get方式获取完整的数据，包括header和body,fsockopen需要 PHP.ini 中 allow_url_fopen 选项开启

function get_url ($url,$cookie=false)
{
$url = parse_url($url);
$query = $url[path]."?".$url[query];
echo "Query:".$query;
$fp = fsockopen( $url[host], $url[port]?$url[port]:80 , $errno, $errstr, 30);
if (!$fp) {
return false;
} else {
$request = "GET $query HTTP/1.1\r\n";
$request .= "Host: $url[host]\r\n";
$request .= "Connection: Close\r\n";
if($cookie) $request.="Cookie:   $cookie\n";
$request.="\r\n";
fwrite($fp,$request);
while()) {
$result .= @fgets($fp, 1024);
}
fclose($fp);
return $result;
}
}
//获取url的html部分，去掉header
function GetUrlHTML($url,$cookie=false)
{
$rowdata = get_url($url,$cookie);
if($rowdata)
{
$body= stristr($rowdata,"\r\n\r\n");
$body=substr($body,4,strlen($body));
return $body;
}
    return false;
}
?>

方法5：用fsockopen函数打开url，以POST方式获取完整的数据，包括header和body

function HTTP_Post($URL,$data,$cookie, $referrer="")
{
    // parsing the given URL
$URL_Info=parse_url($URL);
    // Building referrer
if($referrer=="") // if not given use this script as referrer
$referrer="111";
    // making string from $data
foreach($data as $key=>$value)
$values[]="$key=".urlencode($value);
$data_string=implode("&",$values);
    // Find out which port is needed - if not given use standard (=80)
if(!isset($URL_Info["port"]))
$URL_Info["port"]=80;
    // building POST-request:
$request.="POST ".$URL_Info["path"]." HTTP/1.1\n";
$request.="Host: ".$URL_Info["host"]."\n";
$request.="Referer: $referer\n";
$request.="Content-type: application/x-www-form-urlencoded\n";
$request.="Content-length: ".strlen($data_string)."\n";
$request.="Connection: close\n";
    $request.="Cookie:   $cookie\n";
    $request.="\n";
$request.=$data_string."\n";
    $fp = fsockopen($URL_Info["host"],$URL_Info["port"]);
fputs($fp, $request);
while(!feof($fp)) {
$result .= fgets($fp, 1024);
}
fclose($fp);
    return $result;
}
?>

方法6:使用curl库，使用curl库之前，可能需要查看一下php.ini是否已经打开了curl扩展

$ch = curl_init();
$timeout = 5;
curl_setopt ($ch, CURLOPT_URL, '');
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
$file_contents = curl_exec($ch);
curl_close($ch);
echo $file_contents;
?>