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How To Set Environment Variable in .htaccess

Step 1. Enable mod_rewrite on your Apache web server.

Step 2. Create .htaccess file in root directory.

Step 3. Set Environment Variable by htaccess
    SetEnv FIRSTVAR firstValue
    SetEnv SECONDVAR secondValue

Step 4. Get Environment Variable using the getenv() PHP function
        <?php 
           $firstVar = getenv('FIRSTVAR'); 
           $secondVar = getenv('SECONDVAR'); 
        ?>

Step 5. Restart Apache Server  
        sudo service apache2 restart

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