Source-php-request-2

php比較坑的地方就是实现相同的目的，能够使用超级多种手段。比方(file_get_contents和fopen以及如今提到的curl以及fsockopen当然还有socket)这对于一个经验少的程序猿来说，确实比較难选。、

所以非常多情况下，我们须要比較。

搜索一下网上不负责任的资源。做一个预測。然后亲自比較权衡一下。

以下是摘抄的：

function curlRequest($url, $isPost = false, $param = array(), $cookie = null, $header = null, $referer = "", $timeout = 60) {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        if (is_array($header) && !empty($header)) { //设置header
            $set_head = array();
            foreach ($header as $k => $v) {
                $set_head[] = "$k:$v";
            }
            curl_setopt($ch, CURLOPT_HTTPHEADER, $set_head);
        } else {
            curl_setopt($ch, CURLOPT_HEADER, 0);
        }
        if ($isPost === true) {
            curl_setopt($ch, CURLOPT_POST, $isPost);
            curl_setopt($ch, CURLOPT_POSTFIELDS, $param);
        }
        if (!empty($cookie)) {
            if (is_array($cookie)) {
                $cookies = implode(';', $cookie);
            } else {
                $cookies = $cookie;
            }
            curl_setopt($ch, CURLOPT_COOKIE, $cookies);
        }
        if (!empty($referer)) {
            curl_setopt($ch, CURLOPT_REFERER, $referer);
        }
        if( $timeout > 0 ) {
            curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
        }
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        $ret = curl_exec($ch);
        if (curl_errno($ch)) {
            $ret = '';
        }
        curl_close($ch);
        return $ret;
    }

以下主要是介绍请求头的一些信息

<?php
error_reporting(E_ALL ^ E_NOTICE); 
ini_set('display_errors', true);

//解释怎样使用HTTPHEADER。传送json格式数据
$id = $_POST['id'];
$symbol = $_POST['symbol'];
$companyName = $_POST['companyName'];
$data = array("id" => "$id", "symbol" => "$symbol", "companyName" => "$companyName");
$data_string = json_encode($data);
curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string);
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
    'Content-Type: application/json',
    'Content-Length: ' . strlen($data_string))
);
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>

一般的过程。我们不会用到那么复杂：

<?php
    $startTime = microtime(true);
    $url = "http://api.k780.com:88/?
app=weather.today&weaid=1&appkey=10003&sign=b59bc3ef6191eb9f747dd4e83c99f2a4&format=xml";
    for($i = 0 ; $i < 2; $i++){
        $handle = curl_init($url);
        //$defaultHeader = array('Accept-encoding: gzip, default');
        curl_setopt($handle, CURLOPT_RETURNTRANSFER, 1);
        //curl_setopt($handle, CURLOPT_HTTPHEADER, $defaultHeader);
        curl_setopt($handle, CURLOPT_CONNECTTIMEOUT, 10);
        curl_setopt($handle, CURLOPT_TIMEOUT, 10);
        $xml = curl_exec($handle);
        if($i % 10 == 0){
            echo ".";
        }
        curl_close($handle);
    }
    $endTime = microtime(true);
    $total = $endTime - $startTime;
    echo $total;
    echo curl_error($handle);

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>

须要说明的是：curl在控制台是不能执行的，比方php xxx.php params_1,它须要server。