php中curl使用指南

<?php
$data = "<soap:Envelope>[...]</soap:Envelope>";
$tuCurl = curl_init();
curl_setopt($tuCurl, CURLOPT_URL, "https://example.com/path/for/soap/url/");
curl_setopt($tuCurl, CURLOPT_PORT , 443);
curl_setopt($tuCurl, CURLOPT_VERBOSE, 0);
curl_setopt($tuCurl, CURLOPT_HEADER, 0);
curl_setopt($tuCurl, CURLOPT_SSLVERSION, 3);
curl_setopt($tuCurl, CURLOPT_SSLCERT, getcwd() . "/client.pem");
curl_setopt($tuCurl, CURLOPT_SSLKEY, getcwd() . "/keyout.pem");
curl_setopt($tuCurl, CURLOPT_CAINFO, getcwd() . "/ca.pem");
curl_setopt($tuCurl, CURLOPT_POST, 1);
curl_setopt($tuCurl, CURLOPT_SSL_VERIFYPEER, 1);
curl_setopt($tuCurl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($tuCurl, CURLOPT_POSTFIELDS, $data);
curl_setopt($tuCurl, CURLOPT_HTTPHEADER, array("Content-Type: text/xml","SOAPAction: \"/soap/action/query\"", "Content-length: ".strlen($data)));
$tuData = curl_exec($tuCurl);
if(!curl_errno($tuCurl)){
  $info = curl_getinfo($tuCurl);
  echo 'Took ' . $info['total_time'] . ' seconds to send a request to ' . $info['url'];
} else {
  echo 'Curl error: ' . curl_error($tuCurl);
}
curl_close($tuCurl);
echo $tuData;
?>

<?php
    //初始化
    $curl = curl_init();
    //设置url
    curl_setopt($curl, CURLOPT_URL, 'http://www.baidu.com');
    //设置返回获取的输出为文本流
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    //执行命令
    $data = curl_exec($curl);
    //关闭URL请求
    curl_close($curl);
    //显示获得的数据
    print_r($data);
?>
<?php
    //初始化
    $curl = curl_init();
    //设置url
    curl_setopt($curl, CURLOPT_URL, 'http://www.baidu.com');
    //设置返回获取的输出为文本流
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    //设置post方式提交
    curl_setopt($curl, CURLOPT_POST, 1);
    //设置post数据
    curl_setopt($curl, CURLOPT_POSTFIELDS, array("data"=>"value");
    //执行命令
    $data = curl_exec($curl);
    //关闭URL请求
    curl_close($curl);
    //打印数据
    print_r($data);
?>