Project Information window displays current project summary, so that you can estimate project complexity and costs involved.
Use button to access Project Information window includes information on:

Files: number of files in the current project;

Variables: number of variables in the current project;

Functions: number of functions in the current project;

Lines: total number of lines in all files of the current project. This value does not include empty lines and comments;

Full Size: size of all files of the current project in bytes;

Source code: actual source code size. Typically this stands for estimated files size you can get after code optimization by deleting all comments and blank lines from project files. You can further optimize your code size by replacing variables (new variables names are shorter which results in smaller size of optimized code).

Pie charts display visual proportion of PHP, HTML and JavaScript code in your project (topmost chart) and Source code to Comments ratio (lower chart).