Read a file called populations.txt and populate a php associative array with the values read from the file.

Here is an example populations.txt file:

Dhaka, 23 million

Bangaluru, 21 million

New York, 9 million

Emporia, 23 thousand

Here's some pseudo code:

open the file

loop through the lines in the file

read a line into a string variable

explode (or is it split, or something else) the string into key value pairs

save the key value pair into your associative array

print a table header

loop through the keys of your associative array

print each key value pair

Then move the file and write to another file and read that file