Array Indexing
--------------
SCALAR = $array[SCALAR EXPR];
$value = $array[5];

Array Slicing
-------------
LIST = @array[LIST EXPR];
@values = @array[5,6,7];
$value = @array[5,6,7];
# Prev same as: $value = $array[7];

Hash Indexing
-------------
SCALAR = $hash{SCALAR EXPR};
$value = $hash{'apple'};

Hash Slicing
------------
LIST = @hash{LIST EXPR};
@values = @hash{'apple', 'orange'};
$value = @hash{'apple', 'orange'};
# Prev same as: $value = $hash{'orange'};

List Slicing
------------
LIST = (LIST)[LIST EXPR];
@values = (split(/,/, 'a,b,c,d'))[1,2];
$value = (split(/,/, 'a,b,c,d'))[1,2];
# Prev same as: $value = (split(/,/, 'a,b,c,d'))[2];
[download]

Anyhow, the only reason I wanted to access the list this way was because theres about 10 fields with the same field names and all fields are optional.

• Radio button, this allows user to select an option and only the value of the selected option will be sent to the server. In this case, $INPUT->param('fieldname') will return exactly one value.
• Checkbox, this allows user to select more than one options and the values of selected options will be sent to the server. In this case, $INPUT->param('fieldname') will return more than one values.

So, if you know that you will get more than one values, why you're only interested in the particular value (from your example, the sixth element of the array)? If it wasn't a multiple <select> or <input type="checkbox"> field, say, a number of textfields with the same name, than there might be something wrong with your form design.