[Logician]

Originally posted by JulianD
It is recommended to use it after every fetch_array we perform? Or just when we see the need to free some space in memory.

It's a good habit to use it everytime array is fetched but actually it's needed when resource size is big. For example if your query returned a single line with int values, it really does not matter if you delete the resource from the memory or not but well, as a coder it does not harm to have the habit either..