curl

$ch = curl_init();
// 2. 设置选项，包括URL
curl_setopt($ch, CURLOPT_URL, "http://www.cnblogs.com/jianqingwang/");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 0);//改为0就不输出
curl_setopt($ch, CURLOPT_HEADER, 0);
// 3. 执行并获取HTML文档内容
$output = curl_exec($ch);
// 4. 释放curl句柄
curl_close($ch);

链接微信接口

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$res = curl_exec($ch);
curl_close($ch);

利用curl采集网站内容，并输出到txt文档

<?php
$ch = curl_init("http://www.cnblogs.com/jianqingwang/");
$fp = fopen("example_jianqingwang.txt", "w");

curl_setopt($ch, CURLOPT_FILE, $fp);
curl_setopt($ch, CURLOPT_HEADER, 0);

curl_exec($ch);
curl_close($ch);
fclose($fp);
?>

 2. 设置选项，包括URL
            $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=wxf7842d7bb7532bc7&secret=dafcbe86ab45e1f89bab3c2891559e93";
            curl_setopt($ch, CURLOPT_URL, $url);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);//改为0就不输出
            curl_setopt($ch, CURLOPT_HEADER, 0);