# Sample CGI/Perl Scripts
Here are some sample Perl scripts to try with `cgi-core`.
## Script 1: Display CGI Environment Variables
This script generates an HTML page displaying all CGI environment variables available.
```perl
#!/usr/bin/perl
# print the Content-Type HTTP header
print "Content-Type: text/html\n\n";
# print an HTML page displaying all CGI environment variables available
print "\n";
print "\n";
print "\n";
foreach my $key (keys %ENV) {
print "$key: $ENV{$key}
\n";
}
print "\n";
print "\n";
1;
```
## Script 2: Using `CGI.pm` Module
This script also displays all CGI environment variables but utilizes the `CGI.pm` module for handling HTTP headers.
```perl
#!/usr/bin/perl
use strict;
use warnings;
use CGI;
my $cgi = CGI->new;
print $cgi->header(
-status => "200 OK",
-type => 'text/html'
);
# print an HTML page with all CGI environment variables available
print "\n";
print "\n";
print "\n";
foreach my $key (keys %ENV) {
print "$key: $ENV{$key}
\n";
}
print "\n";
print "\n";
1;
```
## Script 3: Simple Form Submission
This script demonstrates how to create a simple HTML form and process its submission.
```perl
#!/usr/bin/perl
use strict;
use warnings;
use CGI;
my $cgi = CGI->new;
print $cgi->header;
if ($cgi->param('name')) {
my $name = $cgi->param('name');
print "Hello, $name!
\n";
} else {
print $cgi->start_html("Simple Form");
print $cgi->start_form;
print $cgi->textfield(-name => 'name', -placeholder => 'Enter your name');
print $cgi->submit(-value => 'Submit');
print $cgi->end_form;
print $cgi->end_html;
}
1;
```
## Script 4: File Upload
This script demonstrates how to handle file uploads.
```perl
#!/usr/bin/perl
use strict;
use warnings;
use CGI;
my $cgi = CGI->new;
print $cgi->header;
if ($cgi->param('uploaded_file')) {
my $filehandle = $cgi->upload('uploaded_file');
my $filename = $cgi->param('uploaded_file');
open(my $out, '>', $filename) or die "Cannot open file: $!";
binmode $out;
while (my $bytesread = <$filehandle>) {
print $out $bytesread;
}
close($out);
print "File '$filename' uploaded successfully!
\n";
} else {
print $cgi->start_html("File Upload");
print $cgi->start_form(-enctype => 'multipart/form-data');
print $cgi->filefield(-name => 'uploaded_file');
print $cgi->submit(-value => 'Upload');
print $cgi->end_form;
print $cgi->end_html;
}
1;
```
Feel free to modify and test these scripts in your CGI environment!