I'm interested to know what is done when PHP executes a echo or print (for example).
I'm interested to know what trail / path / process it does at the lower level of "machine language". How it allocates this in memory, what space it has allocated, and so on.
Here's a post explaining exactly what I was looking for.
link
The VLD program visualizes the operation code (opcode) that a processor has to perform some tasks.
My intention in using the tool is to understand the difference in low-level behavior of functions that perform 'almost' the same thing.
echo and print for example.
