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);
}