1. Split


The split function splits up a string and places it 
into an array. T

Example:
--------

$sentence= "Best regards and have a nice day .. ";
@its_array = split(/a/, $sentence);

ouputs:
Best  regards  and  have  a nice day  ..

We cam also write:
$_= "Best regards and have a nice day .. ";
@its_array = split(/a/);



2. substr

To substring, as an example, we can use the followinigs:
$sentence= "Best regards and have a nice day .. ";

substr($sentence, 2, 6);	(from 3d to 6th character from the 3d)
returns "st reg"
substr($sentence, 5); (from the 5th to the end of the sentence)
returns "regards and have a nice day .. "
substr($sentence, -9, 4); (from 9th from the end and the 4th from the 9th)
returns "e da"