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Accessing Data Items

The param method provides access to CGI parameters.
  • can get a list of names for all parameters
  • can get value for a single named parameter
  • can modify the values of individual parameters
Examples: 

# get a list of names of all parameters
@names = param();
# get value of parameter "name"
$name = param('name');
# get values of parameter "choices"
@list = param('choices');
# set value of "colour" parameter to 'red"
param('colour','red');
param(-name=>'colour', -value='red');