CGI Scripts
to Create a Website with Interactive Features
Sorting the Database
There are 2 sort routines presented here. The first is a simple ascii code sort that sorts the database by name. The second is used when you need to sort numerically. An ascii sort would sort the numbers 1,2,12,32,300 as 1,12,2,300,32. The numerical sort below would sort them correctly by numeric value.
sort_names.pl
#!/usr/bin/perl
#sort_names.pl
open (INFO,"names_file.txt");
@array=<INFO>;
close (INFO);
@sortedarray=sort(@array);
print "Content-type:text/html\n\n"; #Follow with blank line
print "<html>\n";
print "<head><title></title></head>\n";
print "<body>\n";
foreach $line (@sortedarray){
($last,$first)=split(/\|/,$line);
print "$first $last<br>\n";
}
print "</body>\n";
print "</html>\n";
Test these Scripts
sort_numbers.pl
#!/usr/bin/perl
#sort_numbers.pl
open(INFO, "records_file.txt"); # Open db for reading and display
@array=<INFO>;
close (INFO);
print "Content-type:text/html\n\n"; #Follow with blank line
print "<html>\n";
print "<head><title></title></head>\n";
print "<body>\n";
print "<h4>Sorted by Number</h4>\n";
foreach $line(sort byNUM @array){
chomp($line);
($last,$first,$record)=split(/\|/,$line);
print "$record $first $last<br>\n";
}
print "</body>\n";
print "</html>\n";
#Sorting Subroutine
sub byNUM {
@a=split(/\|/,$a);
@b=split(/\|/,$b);
$a[2] <=> $b[2];
}
records_file.txt
Bunyan|Paul|3
SimpSon|Bart|12
Anderson|Pamela|22
Bush|George|1
Note: If the scripts don't work:
1...Check the shebang line and make sure it is the path recommended by your web host to access the perl interpreter on your server.
2...Be sure to use the Chmod function on your ftp client or file manager to change the permissions of the script to 755
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