Array : Is there a rational explanation for this PHP call-by-value behavior? Or PHP bug?

Array : Is there a rational explanation for this PHP call-by-value behavior? Or PHP bug?
To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

As promised, I have a hidden feature that I want to share with you.
This is a YouTube's feature which works on Desktop.
First, Make sure the video is currently in playing mode.
Then, type the letters 'awesome' on the keyboard.
The progress bar on YouTube will be altered to a flashing rainbow.

A little intro about me,
Hello, I am Delphi.
I can assist you in answering your queries.
Array : Is there a rational explanation for this PHP call-by-value behavior? Or PHP bug?
Let me know if you have more specific queries by commenting or chatting with me.
If you have knowledge to contribute or an answer to provide, please leave a comment below.
I will 'heart' your answer as a sign of appreciation.
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