php获取公众号openid

[墨香年少 32]

<?php

$appid  = 'wx111112222222233333';
$secret = 'qwertyuiasdfghj23456789fcdgvhbjnk';
$callback = urlencode('https://wx.abcdef.com/get_openid/request.php');

if(!isset($_GET['code']))
{
	$url = "https://open.weixin.qq.com/connect/oauth2/authorize?appid=".$appid."&redirect_uri=".$callback."&response_type=code&scope=snsapi_base&state=123#wechat_redirect";
	go($url);
}
else
{
	$code = $_GET['code'];
	$api = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=".$appid."&secret=".$secret."&code=".$code."&grant_type=authorization_code";
	$ret = http($api);
	$arr = json_decode($ret,true);
	echo '<meta content="width=device-width, initial-scale=1" name="viewport" />';
	print_r($arr['openid']);die();
}



function go($url)
{
	header('location:'.$url);
	exit();
}
function http($url, $data = null) {
	$curl = curl_init ();
	curl_setopt ( $curl, CURLOPT_URL, $url );
	curl_setopt ( $curl, CURLOPT_SSL_VERIFYPEER, FALSE );
	curl_setopt ( $curl, CURLOPT_SSL_VERIFYHOST, FALSE );
	if (! empty ( $data )) {
		curl_setopt ( $curl, CURLOPT_POST, 1 );
		curl_setopt ( $curl, CURLOPT_POSTFIELDS, $data );
	}
	curl_setopt ( $curl, CURLOPT_RETURNTRANSFER, 1 );
	$output = curl_exec ( $curl );
	curl_close ( $curl );
	return $output;
}