insert multidimensional array from 1 textarea in php

[TechnoJarvis]

i want to store 2 column value in multi rows like
if i paste a value in textarea like (12.50,25.100,5.30,78.500,98.2000)
and this value insert in my table with 2 column like
col1 col2
12 50
25 100
05 30
78 500
98 2000
so sir can you please help