Function and usage of is_lighttpd_before_150() in wordpress


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    The is_lighttpd_before_150() function in WordPress is a utility function used to determine the version of the lighttpd web server that the WordPress site is running on. Here's a detailed explanation of its functionality and a sample usage scenario:

    Function Declaration

    is_lighttpd_before_150(): bool


    • Primary Function: To check if the WordPress site is being served by a version of the lighttpd web server that is older than version 1.5.0.
    • Importance: This is important because different versions of web servers may have different capabilities, features, or security vulnerabilities. Certain WordPress features or plugins might require functionalities that are only available in newer versions of the server.

    Return Value

    • Type: Boolean (bool)
    • Meaning:
      • true: The site is running on lighttpd version lower than 1.5.0.
      • false: The site is either not running on lighttpd or is running on lighttpd version 1.5.0 or newer.

    Sample Usage


    Suppose you are developing a WordPress plugin or theme that relies on features available in lighttpd version 1.5.0 and above. To ensure compatibility, you need to check the server version before implementing certain functionalities.

    Code Sample

    if ( function_exists( 'is_lighttpd_before_150' ) ) {
        if ( is_lighttpd_before_150() ) {
            // The server is running an older version of lighttpd
            // Implement fallback or display a warning
            echo "You are running an outdated version of lighttpd. Please update for full functionality.";
        } else {
            // The server is running lighttpd 1.5.0 or newer, or a different web server
            // Proceed with regular functionality
    } else {
        // The function is_lighttpd_before_150() doesn't exist
        // Handle the scenario, possibly assuming a newer server version


    • Function Check: The function_exists() check ensures that your code does not break in case the is_lighttpd_before_150 function is not available in the WordPress environment.
    • Version Check: The is_lighttpd_before_150() function is used to determine the server version.
    • Handling Different Scenarios: Depending on the server version, you can implement different logic - for instance, using fallback methods or notifying the user to update their server for the best experience.

    This function is a part of ensuring compatibility and optimal performance of WordPress sites across different server environments.

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