Identify the vulnerabilities of JavaScript and PHP. What are the known issues for exploiting each of these languages? How does this affect the project application? How are these languages affected by the deployment environment (including the client machine, the server, and the executable that executes the code)?

Identify the tools you can use to help you troubleshoot and examine the JavaScript, HTML, and PHP code used in this project. For each tool, explain how it is applicable and list its main features. Include any cost for the program if there is one. What are the limitations of each of these tools?