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search script

Posted on 2000-03-13
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Last Modified: 2010-03-05
in my data file = name|age|gender|description
in my search form , they can search in 3 fields : age, gender and description

can someone pls teach mi how to do a search script so tat a user only needs to search using any one(mininum) of the field ? for example..if he fills in the age form only , all the data with age similar to the form age value will be the result. And if he fills in the age and the description form, all data that meets both the age and description criteria will be the result.
thanx
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Question by:prinx
2 Comments
 
LVL 3

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by:
jyu_88 earned 1600 total points
ID: 2613182
something like the following should do.
The following snippet used exact match for each of the criteria. If a range shall be allowed for comparison, modify the comparison accordingly.

-----------cut--------cut------
#! /usr/bin/perl -w

my ($age, $gender, $descr, $i, $isMatched);

my (@fields, @ages, @genders, @descrs);

# matched list of line numbers.
my @matches = ();

my $datafile = "./datafile1";
open DATAFILE, "<$datafile" or die "failed to open $datafile to read: $!";

# read the datafile into 3 arrays.
while(<DATAFILE>) {
      chomp;      
      @fields = split /|/;
      push @ages, $fields[0];
      push @genders, $fields[1];
      push @descrs, $fields[2];
}
close (DATAFILE);
      

# get criteria variables assigned with values from Form feedback: $age, $gender and $descr, if necessary.
# use CGI.pm the simplest
# you know how to use CGI.pm, right?

# if none is defined, then quit here.
die "Error: You have to specify at least on searching criteria\n" } unless (defined $age or defined $gender or defined $descr)

foreach $i (0..$#ages) {
      #init with 'notMatch'
      $isMatched = 1;
      
      # if $age given, check it.
      if (defined $age) {
      if ($age == $ages[$i]) {$isMatched = 0}
      else { next }
      }
      
      # if gender given, check it.
      if (defined $gender) {
      if ($gender eq $genders[$i]) {$isMatched = 0}
      else { next }
      }

      # if descr given, check it.
      if (defined $descr) {
      if ($descr eq $descrs[$i]) {$isMatched = 0}
      else { next }
      }
      # Done checking. If the final result for line $i is good, add index $i into matched list.
      push @matches, $i if (0 == $isMatched);
}
# end of check all lines

# print out all matches.
if ( -1 == $#matches) {
      print "Sorry, none matched\n"
}
else {
      foreach $i (@matches) {
            print "matched: $ages[$i] $gender[$i] $descrs[$i]\n";
      }
}

exit 0;
-----------cut--------cut---------

      

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Author Comment

by:prinx
ID: 2614623
thanx ;>
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