Here are a few title options, focusing on the problem and solution: Option 1 (Direct and concise): How to Determine the Correct Site URL Protocol in PHP (http vs https) Option 2 (Emphasizing the cha

PHP Get Site URL Protocol - http vs https

Problem Introduction

Determining the current site URL protocol (http or https) is essential for ensuring secure and consistent website operations. However, when developing locally or without SSL, testing the accuracy of such functions can prove challenging.

Function Implementation

The provided function "siteURL" attempts to establish the protocol based on the presence of the 'HTTPS' key in the $_SERVER array and its non-empty or 'off' value. Alternatively, it checks if the 'SERVER_PORT' is 443. If either condition is met, it returns "https://", otherwise "http://".

Alternatives and Concerns

In the absence of SSL, determining the protocol accurately requires examining the $_SERVER array. However, if SSL is active, the server automatically converts the URL to https even if the anchor tag URL uses http. As a result, it may seem unnecessary to check for the protocol.

Improved Implementation

To address this, an improved implementation is proposed by checking for both HTTPS and HTTP protocol indicators in the $_SERVER array. If any of these conditions are met, the function will return the correct protocol.

<code class="php">if (isset($_SERVER['HTTPS']) &&
    ($_SERVER['HTTPS'] == 'on' || $_SERVER['HTTPS'] == 1) ||
    isset($_SERVER['HTTP_X_FORWARDED_PROTO']) &&
    $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https') {
  $protocol = 'https://';
}
else {
  $protocol = 'http://';
}</code>

This approach ensures accuracy for both cases, whether SSL is enabled or not.

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