How do I run a PHP script on my apache server from a FileMaker script? I've tried
Insert From URL
Insert from URL absolutely works, just make sure you have the correct URL. You can also use a web viewer to initiate the script as well. You can inspect the contents of the web viewer or look at the field you pointed to with your Insert from URL script step.
One point to using the Insert from URL step, make sure the target field is on the layout when this step is called.