proc_close在Windows服务器上的退出代码为2

Question

I've been using php wkhtmltopdf and noticed that when using the proc_close function on windows, it returns a value of 2. I've looked for what this exit code means and I can't seem to spot a reference to it. The two codes for proc_close seem to be 0 and -1. I was wondering if anyone could shed some more light on what this error code means. Many thanks.

Answer 1

The manual says:

(proc_close) Returns the termination status of the process that was run. In case of an error then -1 is returned.

So the process returns 2 which is likely an error code. Check the documentation of the process you are calling for the meaning of that error state