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reading from forn

how can i read a string from a form and process each character by character?

for example i enter: hi

i want to be able to edit "h" and "i" individualy
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chongkong
Asked:
chongkong
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1 Solution
 
ozoCommented:
what do you want to do with "h" and "i"?
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chongkongAuthor Commented:
i wanted to add some prefix value for example "ab" to a string of number or character i enter and print if one on a new line

for "hi"

it would be abh and abi
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JFMCommented:
Hi ozo,

You could try to add your prefixes by regular expression:

$line = "hi, this is JFM";
# put any character you want within the [ ]
$line =~ s/([hi])/ab$1\n/g;
print $line;

# shows:
abh
abi
, tabh
abi
s abi
s JFM

I don't know a possibility to read each character by character. For better effeciency it would be better to read line by line (or even the whole stream) and process the line afterwards.

Hope, that helps,
JFM.
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stepherdCommented:

Assuming your HTML form is using the post method, and (for argument) the name of the field is "text" use this:

#!/usr/local/bin/perl      

print "Content-type: text/html\n\n";

&parse_form;


@letters = split(//, $in{'text'});



sub parse_form {

   # Get the input
   read(STDIN, $buffer, $ENV{'CONTENT_LENGTH'});

   # Split the name-value pairs
   @pairs = split(/&/, $buffer);

   foreach $pair (@pairs) {
      ($name, $value) = split(/=/, $pair);

      # Un-Webify plus signs and %-encoding
      $value =~ tr/+/ /;
      $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex($1))/eg;
      $value =~ s/<!--(.|\n)*-->//g;

      $in{$name} = $value;
   }

}


This will put all the letters in your the word into the array
@letters. So, if your form submitted the word "hi", then

@letters[0] = "h"
@letters[1] = "i"




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chongkongAuthor Commented:
thanks stepherd,

its with i needed
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ozoCommented:
You're thanking stepherd, but accepted JFM's answer.
Which was really what you needed?

(also, substr($in{'text'},0,1) eq "h", substr($in{'text'},1,1) eq "i",
or vec, or while( m/(.)/sg ) or pack/unpack or some other technique may be appropriate depending on what kind of editing you wish to do)
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JFMCommented:
ok, sorry for that. I was a little bit too quick, thinking I understood the problem and had the right answer. Next time, it'll be a comment.
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