本文主要是介绍PHP 发送http请求，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！

PHP发送HTTP请求的6种方法

方法1: 用 file_get_contents 以get方式获取内容：

<?php
$url = 'https://wenda.shukaiming.com/';
echo file_get_contents($url);
?>

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    方法2: 用fopen打开url, 以get方式获取内容：

<?php
//r标识read，即标识只读
$fp = fopen($url, 'r');
stream_get_meta_data($fp);
while (!feof($fp)) {
    $body.= fgets($fp, 1024);
}
echo $body;
fclose($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);
$opts = array('http' => array('method' => 'POST', 'header' => 'Content-type: application/x-www-form-urlencodedrn' . 'Content-Length: ' . strlen($data) . '\r\n', 'content' => $data));
$context = stream_context_create($opts);
$html = file_get_contents('https://wenda.shukaming.com', 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;
    $fp = fsockopen($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:  $cookien";
        $request.= "\r\n";
        fwrite($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, ”rnrn”);
        $body = substr($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-urlencodedn";
    $request.= "Content-length: " . strlen($data_string) . "\n";
    $request.= "Connection: closen";
    $request.= "Cookie:  $cookien";
    $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://wenda.shukaiming.com');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
$file_contents = curl_exec($ch);
curl_close($ch);
echo $file_contents;
?>

<?php
/**
 * 发送post请求
 * @param string $url 请求地址
 * @param array $post_data post键值对数据
 * @return string
 */
function send_post($url, $post_data) {
    $postdata = http_build_query($post_data);
    $options = array(
        'http' => array(
            'method' => 'POST',
            'header' => 'Content-type:application/x-www-form-urlencoded',
            'content' => $postdata,
            'timeout' => 15 * 60 // 超时时间（单位:s）
        )
    );
    $context = stream_context_create($options);
    $result = file_get_contents($url, false, $context);
    return $result;
}

$post_data = array(
    'username' => 'abcdef',
    'password' => '123456'
);
send_post('http://xxx.com', $post_data);

<?php
$ch=curl_init('http://www.xxx.com/xx.html');
curl_setopt($ch,CURLOPT_RETURNTRANSFER,true);
curl_setopt($ch,CURLOPT_BINARYTRANSFER,true);
$output=curl_exec($ch);
$fh=fopen("out.html",'w');
fwrite($fh,$output);
fclose($fh);

/**
 * Socket版本
 * 使用方法：
 * $post_string = "app=socket&version=beta";
 * request_by_socket('blog.snsgou.com', '/restServer.php', $post_string);
 */
function request_by_socket($remote_server,$remote_path,$post_string,$port = 80,$timeout = 30) {
    $socket = fsockopen($remote_server, $port, $errno, $errstr, $timeout);
    if (!$socket) die("$errstr($errno)");
    fwrite($socket, "POST $remote_path HTTP/1.0");
    fwrite($socket, "User-Agent: Socket Example");
    fwrite($socket, "HOST: $remote_server");
    fwrite($socket, "Content-type: application/x-www-form-urlencoded");
    fwrite($socket, "Content-length: " . （strlen($post_string) + 8） . "");
    fwrite($socket, "Accept:*/*");
    fwrite($socket, "");
    fwrite($socket, "mypost=$post_string");
    fwrite($socket, "");
    $header = "";
    while ($str = trim(fgets($socket, 4096))) {
        $header .= $str;
    }

    $data = "";
    while (!feof($socket)) {
        $data .= fgets($socket, 4096);
    }

    return $data;
}

方法1: 用 file_get_contents 以get方式获取内容：
<?php$url = 'https://wenda.shukaiming.com/';echo file_get_contents($url);?>
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    方法2: 用fopen打开url, 以get方式获取内容：
<?php//r标识read，即标识只读$fp = fopen($url, 'r');stream_get_meta_data($fp);while (!feof($fp)) {    $body.= fgets($fp, 1024);}echo $body;fclose($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-urlencodedrn' . 'Content-Length: ' . strlen($data) . '\r\n', 'content' => $data));$context = stream_context_create($opts);$html = file_get_contents('https://wenda.shukaming.com', 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
<?phpfunction get_url($url, $cookie = false) {    $url = parse_url($url);    $query = $url[path] . ” ? ” . $url[query];    echo $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:  $cookien";        $request.= "\r\n";        fwrite($fp, $request);        while (!@feof($fp)) {            $result.= @fgets($fp, 1024);        }        fclose($fp);        return $result;    }}//获取url的html部分，去掉headerfunction GetUrlHTML($url, $cookie = false) {    $rowdata = get_url($url, $cookie);    if ($rowdata) {        $body = stristr($rowdata, ”rnrn”);        $body = substr($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
<?phpfunction 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-urlencodedn";    $request.= "Content-length: " . strlen($data_string) . "\n";    $request.= "Connection: closen";    $request.= "Cookie:  $cookien";    $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($ch, CURLOPT_URL, 'http://wenda.shukaiming.com');curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);$file_contents = curl_exec($ch);curl_close($ch);echo $file_contents;?>

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