Unique 10-Digit Random Code Generator

I'm looking for a talented developer to create a PHP-based webpage that generates a unique 10-digit alphanumeric code on every load. The generated codes should never replicate, regardless of how many times the page is loaded. Key Requirements: - The 10-digit codes should be a mix of letters (both uppercase and lowercase) and numbers. - The webpage should be developed using PHP. Key Considerations: - The solution you provide should ensure that the codes never repeat. Your approach in achieving this, whether it be by real-time checking, database storage, or other methods is up to you. - There is no specific requirement for the storage of the generated codes, as long as the system ensures their uniqueness. Ideal Skills: - Proficiency in PHP and web development. - Strong understanding of random code generation and uniqueness. - Experience with code storage and management. Please consider the critical need for code uniqueness as you submit your proposal for this project.