I would like to know how to disable PHPStorm line wrapping.
On the menu bar, look for the 'View' option - > 'Active Editor' - > 'Use Soft Wraps'. However, this will work only for the file that is open.
If you want to keep this option in the editor in general (for all files), then you have to configure it in Preferences - > General - > On the tab, you disable the 'Use Soft Wraps in Editor' option.