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');  
//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

<?php  
    $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);  
    $opts = array (  
    <span style="white-space:pre">  </span>'http' => array (  
    <span style="white-space:pre">      </span>'method' => 'POST',  
    <span style="white-space:pre">      </span>'header'=> "Content-type: application/x-www-form-urlencoded
" .  
    <span style="white-space:pre">      </span>"Content-Length: " . strlen($data) . "
",  
    <span style="white-space:pre">      </span>'content' => $data  
    <span style="white-space:pre">  </span>)  
    );  
    //生成请求的句柄文件  
    $context = stream_context_create($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
";  
    $request .= "Host: $url[host]
";  
    $request .= "Connection: Close
";  
    if($cookie) $request.="Cookie:   $cookie
";  
    $request.="
";  
    fwrite($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,"

");  
    $body=substr($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
";  
    $request.="Host: ".$URL_Info["host"]."
";  
    $request.="Referer: $referer
";  
    $request.="Content-type: application/x-www-form-urlencoded
";  
    $request.="Content-length: ".strlen($data_string)."
";  
    $request.="Connection: close
";  
        $request.="Cookie:   $cookie
";  
        $request.="
";  
    $request.=$data_string."
";  
        $fp = fsockopen($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

CURL 是常用的访问HTTP协议接口的lib库，性能高，还有一些并发支持的功能等。 
curl_setopt($ch, opt) 可以设置一些超时的设置，主要包括：   
① (重要) CURLOPT_TIMEOUT 设置cURL允许执行的最长秒数。     
② (重要) CURLOPT_TIMEOUT_MS 设置cURL允许执行的最长毫秒数。   
（在cURL 7.16.2中被加入。从PHP 5.2.3起可使用）
③  CURLOPT_CONNECTTIMEOUT 在发起连接前等待的时间，如果设置为0，则无限等待。
④ CURLOPT_CONNECTTIMEOUT_MS 尝试连接等待的时间，以毫秒为单位。如果设置为0，则无限等待。  （在cURL 7.16.2中被加入。从PHP 5.2.3开始可用） 
⑤ CURLOPT_DNS_CACHE_TIMEOUT 设置在内存中保存DNS信息的时间，默认为120秒。

/*
 * curl get 方式获取远程内容
 * @param $url string 远程URL
 * @param $timeout int 
 * @return string
 */
function curl_get($url,$timeout){
    $ch = curl_init();
    curl_setopt ($ch, CURLOPT_URL, $url);
    curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt ($ch, CURLOPT_TIMEOUT, $timeout);
    $file_contents = curl_exec($ch);
    curl_close($ch);
    return $file_contents;
}

 /*
     * 对https的URL发送请求
     */
    private function curl_for_https($url){
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL,$url);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        //不加下面的 返回的就是 access_token=F5A4FEDE95AD3D88DD29EC1F904B24C8&expires_in=7776000&refresh_token=2BF2DD1B05CF510CD2EEE2466009EFC0bool(true)
        //并且页面直接输出后 就不向下执行了
        curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
        $result = curl_exec($ch);
        curl_close($ch);
        return $result;
    }

/*
     * 对https页面发送POST请求
     */
    function curl_for_post($url, $post_data = '', $timeout = 5){
        $ch = curl_init();
        curl_setopt ($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        curl_setopt ($ch, CURLOPT_POST, 1);
        if($post_data != ''){
            curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
        }
        curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
        curl_setopt($ch, CURLOPT_HEADER, false);
        $file_contents = curl_exec($ch);
        curl_close($ch);
        return $file_contents;
    }

通过post方式发送json格式数据

/*
     * php 通过post方式发送json数据
     */
	private function http_post_data($url, $data_string) {  
        $ch = curl_init();  
        curl_setopt($ch, CURLOPT_POST, 1);  
        curl_setopt($ch, CURLOPT_URL, $url);  
        curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string);  
        curl_setopt($ch, CURLOPT_HTTPHEADER, array(  
            'Content-Type: application/json; charset=UTF-8',  
            'Content-Length: ' . strlen($data_string),
            'Tunnel-Command:4261421091'));  
        ob_start();  
        curl_exec($ch);  
        $return_content = ob_get_contents();  
        ob_end_clean();  
  
        $return_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);  
        return array($return_code, $return_content);  
    }