how to pass an array to a perl cgi script with a HTML form?

Question

In a HTML form, if we give names to input boxes with [], like this

<input name="foo[]" type="text" />
<input name="foo[]" type="text" />

In PHP, we can obtain values of these input boxes in an array, with $_POST['foo'].

How to do the similar in Perl? I use CGI.pm

cjm · Accepted Answer · 2010-08-14 23:37:03Z

16

Just assign the result of param to an array.

my @values = param('foo[]');         # If you use the functional-style
my @values = $query->param('foo[]'); # If you use the OO-style of CGI.pm

There's no requirement that the name end with [].

answered Aug 14, 2010 at 23:37

cjm

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8 Comments

vol7ron Over a year ago

Be careful. You should remember to first check for the proper REQUEST_METHOD (GET/POST). CGI::param() is used to retrieve either GET or POST request parameters from the header.

cjm Over a year ago

@vol7ron, why would you need to check the request method? Ordinarily, it doesn't matter which method was used.

AmbroseChapel Over a year ago

Maybe he means in PHP. In PHP it might be in $_POST but it might also be in $_GET, or of course, both.

vol7ron Over a year ago

@AmbroseChapel: no, I meant Perl; it's because of the different PHP handlers that I wanted to make the distinction.

cjm Over a year ago

@vol7ron, anybody who would be stopped (or even noticeably slowed) by that "security measure" would never manage to hack your code anyway. Unless you need to vary the behavior of the script based on the request method, checking it is pointless. It's just extra complexity in your code.

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