After thorough research, I came across a method to achieve exactly what I need. However, I have some reservations because I've heard that it could pose a potential "security risk." Unfortunately, no one seems to provide further information on why this may be the case. Personally, I fail to see any security threats unless an unauthorized individual already has access they shouldn't have. Both the MySQL and PHP servers are running on the same machine, thus eliminating any public requests between them.
The PHP script triggered by the system will interact with a third-party CRM/ESP through an API call, allowing our marketing team to efficiently access and manage certain tables on their server without constant intervention from the development team.
The data stored on the external server is not identical to ours; it only contains relevant details for their operations. My reasoning for using triggers is to ensure that their information remains current and maintain all related logic in a centralized location rather than scattered throughout the project.
UPDATE: Before executing any Forms that interface with MySQL, I always take measures to sanitize and validate them. There is no instance of storing PHP code within my database tables, and I exclusively rely on SFTP with a .pem file instead of traditional passwords. The script to be executed is a static file I generated which undergoes the same framework I utilize (Zend). It solely passes the row's id as input, ensuring validation as an integer. Despite concerns about performance issues and possible asynchronous execution complexity, I remain curious. Besides performance considerations, how would security risks differ compared to those present when utilizing a web service? Since proper sanitation and validation procedures are required similarly to working with a web service, what additional worries should I be aware of?