PHP Redirect condition

时间：2017-01-07 作者：borkith

我正在编写一个脚本，以检测用户是否离我们的位置足够近，从而显示位于子域上的网站的本地版本。我正在寻求帮助，我应该插入这一点和从WordPress重定向的最佳方法

<?php
$ip = $_SERVER[\'REMOTE_ADDR\'];
$details = json_decode(file_get_contents("http://ipinfo.io/{$ip}/json"));
$clean = substr($details->loc, 0, -1);
$coord = explode(\',\', $clean);
$latitudeFrom = floatval($coord[0]);
$longitudeFrom = floatval($coord[1]);
echo "Long: ".$longitudeFrom."\\r\\n";
echo "Lat: ".$latitudeFrom."\\r\\n";

$longitudeTo = -68.6833;
$latitudeTo = 33.1711;
$radius = 50; //miles

  $latFrom = deg2rad($latitudeFrom);
  $lonFrom = deg2rad($longitudeFrom);
  $latTo = deg2rad($latitudeTo);
  $lonTo = deg2rad($longitudeTo);

  $latDelta = $latTo - $latFrom;
  echo $latDelta."\\r\\n";
  $lonDelta = $lonTo - $lonFrom;
  echo $lonDelta."\\r\\n";

  $angle = 2 * asin(sqrt(pow(sin($latDelta / 2), 2) +
    cos($latFrom) * cos($latTo) * pow(sin($lonDelta / 2), 2)));
  $distance = $angle * 3959;

  if ($distance < $radius) {
    //redirect to local page
  }
?>

2 个回复
SO网友:Milo

如果希望它尽早运行（如果希望避免加载不必要的资产，这很有意义），请将代码放在Must Use Plugin, 并将该函数挂接到muplugins_loaded 行动

<?php

add_action( \'muplugins_loaded\', \'wpd_my_redirector\' );

function wpd_my_redirector() {

    // your code here
    // wp_redirect is not defined this early, so we use php\'s header

    if( $somecondition === true ){
        header( \'Location: \' . home_url( \'/your-local-page/\' ) );
        exit;
    }
}

SO网友:czerspalace

在函数中。您的主题的php文件，我将添加一个挂钩到template\\u redirect的操作，如下所示（未测试）：

<?php
    add_action( \'template_redirect\', \'wpse251614_redirect_to_local_site\'    );

    function wpse251614_redirect_to_local_site(){
        $ip = $_SERVER[\'REMOTE_ADDR\'];
        $details = json_decode(file_get_contents("http://ipinfo.io/{$ip}/json"));
        $clean = substr($details->loc, 0, -1);
        $coord = explode(\',\', $clean);
        $latitudeFrom = floatval($coord[0]);
        $longitudeFrom = floatval($coord[1]);
        echo "Long: ".$longitudeFrom."\\r\\n";
        echo "Lat: ".$latitudeFrom."\\r\\n";

        $longitudeTo = -68.6833;
        $latitudeTo = 33.1711;
        $radius = 50; //miles

        $latFrom = deg2rad($latitudeFrom);
        $lonFrom = deg2rad($longitudeFrom);
        $latTo = deg2rad($latitudeTo);
        $lonTo = deg2rad($longitudeTo);

        $latDelta = $latTo - $latFrom;
        echo $latDelta."\\r\\n";
        $lonDelta = $lonTo - $lonFrom;
        echo $lonDelta."\\r\\n";

        $angle = 2 * asin(sqrt(pow(sin($latDelta / 2), 2) +
        cos($latFrom) * cos($latTo) * pow(sin($lonDelta / 2), 2)));
        $distance = $angle * 3959;

        if ($distance < $radius) {
            //redirect to local page
            wp_redirect(LOCAL_PAGE);
            exit;
        }
    }
?>
参考号：

https://codex.wordpress.org/Plugin_API/Action_Reference/template_redirecthttps://developer.wordpress.org/reference/functions/wp_redirect/

标签： php   redirect   小码农  

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