How to json encode Specific key in PHP?

Question

https://code.sololearn.com/w3CCjdff0Wgw/?ref=app

Answer 1

I have an idea using array_filter(), but I'm not sure.

https://code.sololearn.com/wc5dYHIT3eZC/?ref=app

Answer 2

Do you have any specification about which key to be selected? or just random one?

For the example in your code, which particular one is to be selected?

Answer 3

Ipang I want to select key1 to json encode

Answer 4

Thank you Ipang

Answer 5

No problem 👌