Hello ,
I have gone through the project details .I am happy to tell you that I understood what you want and I am ready to assist you to create a script that you can install in a Apache server that has WHM that searches in ALL MySQL databases from all clients that are used by Wordpress as per your requirements . I have 7+ years of experience in SEO , Website design , PHP , CSS , HTML , Word Press , Laravel , Graphic design , Code ignitor and i have dealt with 250+ websites... I assure you that I will complete the work as early as possible with the best QUALITY. I am interested to know more about the project so please connect with me for the further discussion.
THANK YOU.