Perl Multiline Variables and inline PHP

vargadanis · 10-16-2007, 11:03 AM

Hi all

I am trying to write a script in Perl that would generate a PHP site that is actually not that complicated. My only problem is that I do not have the option to operate with 2 files so I need to have everything in 1 Perl file. I need to have the PHP file inside the Perl file in some form of variable or something like that. Is it possible to put a php code like that into a var in perl?

PHP Code:



<?  
$google = "Hello World"; 
print $google; 
etc... 
?>

Thx...

indienick · 10-16-2007, 01:07 PM

What you could do is have a single output variable, and constantly concatenate to it depending on the flow control:

Code:

...
my $var = '<font size="2">';
my $bold = '<b>';
my $italic = '<i>';

$var .= $bold if ($style == 'bold');
$var .= $italic if ($option == 'italic');

# Close the open tags...
$var .= '</i></b></font>';
...

The one problem you will almost certainly run into with this, is that you may not always know which tags are open or closed. You will probably have to incorporate a function to scan through a line (before it's printed) and ordinally close any open tags (ie. <i> was the last opened tag, so close it first) by simply taking the tag opening string, and inserting a forward slash "/" after the opening "<". The sub-problem that arises from this is tags with extended information - "<font size=2 color=...>" - and having to deal with taking out everything in between "<tagname" and the closing ">", but that could easily be taken care of with a regular expression.

vargadanis · 10-16-2007, 02:09 PM

I went through the regular expressions again and realized that there are differences between the ' and " signs. When I tried this:

Code:

$var = "<?
print 'Hello';
$ccol = sad;
?>";

i bumped into an error. Then I replaced the " to ' and the ' to \' that way it worked without the use strict part of the code. I got only a warning. Why isn't it working with the use strict; stuff too? What is wrong with it?

vargadanis · 10-17-2007, 05:52 AM

I believe that the solutions to my problem is the following:

Code:

$var = <<EOF;
<?
    whatever php code comes here
?>
EOF
print $var;

chrism01 · 10-17-2007, 06:59 AM

See also the qw operator: http://perldoc.perl.org/perlop.html#...Like-Operators

bigearsbilly · 10-17-2007, 08:05 AM

also, quite neat and readable is:

Code:

#!/usr/bin/perl

print while <DATA>;


__DATA__
put your
php 
code in
here

vargadanis · 10-17-2007, 08:20 AM

Quote:

Originally Posted by bigearsbilly

also, quite neat and readable is:

Code:

#!/usr/bin/perl

print while <DATA>;


__DATA__
put your
php 
code in
here

It is readable, however there are one thing that I do not get. What are the __ signs and how shall I interpret it? Why do u refer to the DATA as <DATA>.
Also I found loops like while(<>) that is in infinite loop similar to for(;

. What is the background of it? I am no perl programmer (yet) but I am eager to learn this language but I cant go to the next step as long as I bump into such things.
It turned out that I have got more than one problems, heh?

bigearsbilly · 10-17-2007, 08:37 AM

__DATA__

is a tag, which means all after this is data not perl script
this DATA is accessible using the DATA filehandle.

so it's exactly like reading a separate file but it's embedded in your script.

vargadanis · 10-17-2007, 09:00 AM

Ahh... that is cool... Probably it helped a lot.

Do peeps usually encode the __DATA__ tag? Like Base64 or something like that?

bigearsbilly · 10-17-2007, 09:24 AM

er, hmmm, er,

I guess you could do what you like, never tried not knowing nothing about Base64 encoding.

For example,
I was playing about, bored and made a google querier,
which substitutes the command line query into the DATA section...

(note this is at work, so using a proxy server)

Code:

#!/usr/bin/perl
use IO::Socket;

@ARGV or die "search for?\n";
my $proxy = "xna4.intra.yy.com:8080";
my $port = "8080";

$sock = IO::Socket::INET->new(   PeerAddr => $proxy,
                                 PeerPort => 'http(80)',
                                 Proto    => 'tcp');

$" = "+"; # put '+' instead of spaces
$query = "@ARGV";

while (<DATA>) {
    s/SEARCH_PATTERN/$query/;
    $sock->send($_);
}


while($sock->read($data, 1024)) {
     print $data;
}



__DATA__
GET http://www.google.co.uk/search?q=SEARCH_PATTERN HTTP/1.0
Proxy-Connection: Keep-Alive
User-Agent: Billy-Browser
Host: www.google.co.uk
Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, image/png, */*
Accept-Language: en
Accept-Charset: iso-8859-1,*,utf-8

vargadanis · 10-17-2007, 09:30 AM

Yup... that __DATA__ thing is the one that works that best. The file is now ready to be used. Low quality code but it does what it is supposed to do.

thanx guys for the help

bigearsbilly · 10-17-2007, 09:39 AM

I use it quite a lot, it's also very good for example data
for filter programs,
so when 6 months later you go back and say "what the hell does this do?"
you'll have an example to run.

vargadanis · 10-17-2007, 10:34 AM

Maybe, I would post, the entire code here so that u can comment it and say what are the thing that u would do in a different way, and why is ur solution better. U think u could do this for me?

bigearsbilly · 10-18-2007, 02:04 AM

I could try.
mind you I don't know php