February 2006
Intermediate to advanced
304 pages
6h 16m
English
Content preview from Wicked Cool Perl Scripts
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#15 Visitor Counter
This program lets someone know how many times a web page has been visited.
The Code
1 #!/usr/bin/perl -T 2 use strict; 3 use warnings; 4 use GD; 5 6 # The file containing the visitor number 7 my $num_file = "/var/visit/vcount.num"; 8 9 # Number to use for counter 10 my $num = 0; 11 if (-f $num_file) { 12 if (open IN_FILE, "<$num_file") { 13 $num = <IN_FILE>; 14 chomp($num); 15 close(IN_FILE); 16 } 17 } 18 19 print "Content-type: image/png\n\n"; 20 21 my $font = gdGiantFont; 22 my $char_x = $font->width; 23 my $char_y = $font->height; 24 25 my $picture_x = (1 + $char_x) * length($num) + 1; 26 my $picture_y = (1 + $char_y); 27 28 my $image = new GD::Image($picture_x, $picture_y); 29 my $background = $image->colorAllocate(0,0,0); ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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