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
<?php
$url = 'http://www.domain.com/';
$html = file_get_contents($url);
echo $html;
?>

方法2: 用fopen打开url, 以get方式获取内容
<?php
$fp = fopen($url, 'r');
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
<?php
$data = array ('foo' => 'bar');
$data = http_build_query($data);
$opts = array (
'http' => array (
'method' => 'POST',
'header' => "Content-type: application/x-www-form-urlencoded\r\n" . "Content-Length: " . strlen($data) . "\r\n",
'content' => $data
)
);
$context = stream_context_create($opts);
$html = file_get_contents('http://localhost/e/admin/test.html', 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
<?php
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, $request);
while (!@feof($fp)) {
$result .= @fgets($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
<?php
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
<?php
$ch = curl_init();
$timeout = 5;
curl_setopt ($ch, CURLOPT_URL, 'http://www.domain.com/');
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
$file_contents = curl_exec($ch);
curl_close($ch);
echo $file_contents;
?>