Source-php-request-2

php比较坑的地方就是实现同样的目的，可以使用超级多种手段。比如(file_get_contents和fopen以及现在提到的curl以及fsockopen当然还有socket)这对于一个经验少的程序员来说，确实比较难选。、

所以很多情况下，我们需要比较。搜索一下网上不负责任的资源，做一个预测。然后亲自比较权衡一下。

下面是摘抄的：

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;
}

下面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);

//解释如何使用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))
);
?>

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);

?>

需要说明的是：curl在控制台是不能运行的，比如php xxx.php params_1,它需要服务器。