Warning in WordPress Logs from wp-cassify Plugin

Dear wp-cassify Support Team,

We have observed that the WordPress logs are repeatedly logging a warning related to a call from the wp-cassify plugin, causing the logs to occupy several gigabytes of space. Below is the observed error message:

[27-Jun-2024 07:31:48 UTC] PHP Deprecated:  parse_str(): Passing null to parameter #1 ($string) of type string is deprecated in /wp-content/plugins/wp-cassify/classes/wp_cassify_utils.php on line 143

This error is caused because the function parse_str() is being called with a null value as the first parameter, which is deprecated as of PHP 8.1.

The affected line is located in /wp-content/plugins/wp-cassify/classes/wp_cassify_utils.php, on line 143.

To resolve this issue, the function wp_cassify_extract_get_parameter can be modified as follows:

/**
 * Return value of a parameter passed in url with get method.
 * @param   string $url                     Http url from wich you extract GET parameters
 * @param   string $get_parameter_name      GET parameter name
 * @return  string $get_parameter_value     GET parameter value
 */ 
public static function wp_cassify_extract_get_parameter( $url , $get_parameter_name ) {

    $get_parameter_value = null;

    $query = parse_url( $url , PHP_URL_QUERY );

    if (! empty( $query ) ) {
        parse_str($query, $url_params);
    }

    if (! empty( $url_params[ $get_parameter_name ] ) ) {
        $get_parameter_value = $url_params[ $get_parameter_name ];
    }

    return $get_parameter_value;
}

This modification ensures that the parse_str() function is only called when the $query is not null, thereby avoiding the deprecation warning.

Thank you for your attention to this matter.

Best regards,
Ernesto