Php: Http or Https

PHP Get Site URL Protocol - http vs https

It is not automatic. Your top function looks ok.

remove http and https from string in php

This worked for me,

$http_referer = str_replace($removeChar, "", "https://example.com/");

How to find the domain is whether HTTP or HTTPS (with or without WWW) using PHP?

You could use cURL method:

$url_list = ['facebook.com','google.com'];

foreach($url_list as $url){

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch,CURLOPT_USERAGENT,'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.13) Gecko/20080311 Firefox/2.0.0.13');
    curl_exec($ch);

    $real_url =  curl_getinfo($ch, CURLINFO_EFFECTIVE_URL);
    echo $real_url;//add here your db commands

}

This one take some times because it take the last redirected url. if you only want to check whether its http or https you could try this:

$url_list = ['facebook.com','google.com'];

foreach($url_list as $url){

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_exec($ch);

    $real_url =  curl_getinfo($ch, CURLINFO_REDIRECT_URL);
    echo $real_url;//add here your db commands

}

Replace http or https prefix in string PHP

You can try like:

$test = "https://stackoverflow.com/";
$test = rtrim(preg_replace ('/https|http/','test',$test,1),'/');
echo $test;

How to find out if you're using HTTPS without $_SERVER['HTTPS']

This should always work even when $_SERVER['HTTPS'] is undefined:

function isSecure() {
  return
    (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off')
    || $_SERVER['SERVER_PORT'] == 443;
}

The code is compatible with IIS.

From the PHP.net documentation and user comments :

1. Set to a non-empty value if the script was queried through the HTTPS protocol.

2. Note that when using ISAPI with IIS, the value will be "off" if the request was not made through the HTTPS protocol. (Same behaviour has been reported for IIS7 running PHP as a Fast-CGI application).

Also, Apache 1.x servers (and broken installations) might not have $_SERVER['HTTPS'] defined even if connecting securely. Although not guaranteed, connections on port 443 are, by convention, likely using secure sockets, hence the additional port check.

Additional note: if there is a load balancer between the client and your server, this code doesn't test the connection between the client and the load balancer, but the connection between the load balancer and your server. To test the former connection, you would have to test using the HTTP_X_FORWARDED_PROTO header, but it's much more complex to do; see latest comments below this answer.

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