In php how to remove whitespace without using trim function

Question

anybody do it it's a good task

Answer 1

Use regex replace.
https://code.sololearn.com/w65SpWE1ll68/?ref=app

Answer 2

You saied without trim function

Answer 3

Edit the title.

Answer 4

preg_replace is inbuilt function

Answer 5

without using in build function

Answer 6

in Java easy to do that but in php I can't find that type of solution