DrZed
User
Jun 23, 2000, 5:56 PM
Post #2 of 2
(2418 views)
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Re: Help with search results problem!
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The script is trying to use $result_count to determine how many pages there should be.
However, the value is being created during the whole listing process and it needs to be determined BEFORE the listing process and before it is used to determine pages.
Also, you calculate $firstresult and $lastresult, but don't use either.
Here's a version that should work, or at least be closer:
<BLOCKQUOTE><font size="1" face="Arial,Helvetica,sans serif">code:</font><HR>
#!/usr/local/bin/perl
print "Content-type: text/html\n\n";
use CGI qw(param);
$pagesize = 10;
$result_count = 0;
$string = param('string');
$mod = param('mod');
if (($string eq "") && ($mod eq "")){
print "No data entered to search for.<br>\n";
print "Please <a href=\"Javascript:history.back()\">click here</a> to go back.\n";
exit;
}
$dude = 0;
print "<table width=\"600\" cellspacing=\"0\" cellpadding=\"2\" border=\"0\"><tr bgcolor=\"#000000\">\n";
print "<td><b><FONT SIZE=\"-1\" FACE=\"verdana, arial, helvetica\" color=\"#FFFFFF\">Photo</font></b></td>\n";
print "<td><b><FONT SIZE=\"-1\" FACE=\"verdana, arial, helvetica\" color=\"#FFFFFF\">Stock</font></b></td>\n";
print "<td><b><FONT SIZE=\"-1\" FACE=\"verdana, arial, helvetica\" color=\"#FFFFFF\">Year</font></b></td>\n";
print "<td><b><FONT SIZE=\"-1\" FACE=\"verdana, arial, helvetica\" color=\"#FFFFFF\">Make</font></b></td>\n";
print "<td><b><FONT SIZE=\"-1\" FACE=\"verdana, arial, helvetica\" color=\"#FFFFFF\">Model</font></b></td>\n";
print "<td><b><FONT SIZE=\"-1\" FACE=\"verdana, arial, helvetica\" color=\"#FFFFFF\">Price</font></b></td>\n";
print "<td><b><FONT SIZE=\"-1\" FACE=\"verdana, arial, helvetica\" color=\"#FFFFFF\">Details</font></b></td>\n";
print "</tr>\n";
open (DATA,"<cars.dat") or die "Couldn't open cars.dat $!\n";
@data=();
while (<DATA> ){
chomp;
$line=$_;
@results = split(/:/,$line);
if ($results[1] eq $string or $results[4] eq $mod){
push(@data,$line);
$result_count++;
}
}
close DATA;
# Check to see how many to show on page
if ($result_count != 0) {
$pagecount = int($result_count / $pagesize);
if (($pagecount * $pagesize) != $result_count) {
$pagecount++;
}
}
$firstresult = (($reqpage - 1) * $pagesize) + 1;
$lastresult = $firstresult + $pagesize - 1;
if ($lastresult > $result_count) {
$lastresult = $result_count;
}
foreach ($firstresult..$lastresult ){
@results = split(/:/,@data[$_]);
if ($dude eq 0) { $color = '#D0D0D0';
$dude = 1;
}
else { $dude = 0;
$color = '#FFFFFF';
}
if ($results[0] ne "none"){
print "<tr bgcolor=$color>\n";
print "<td align=\"center\"><a href=\"http://cuzzart.com/usedhtml/$stock.html\"><img src=\"http://cuzzart.com/usedhtml/images/camera.gif\" border=\"0\"></a></td>\n";
}else{
print "<td align=\"center\"><img src=\"http://cuzzart.com/usedhtml/images/none.gif\" border=\"0\"></td>\n";
}
print "<td><FONT SIZE=\"-1\" FACE=\"verdana, arial, helvetica\" color=\"#000000\">", $results[1],"</font></td>\n";
print "<td><FONT SIZE=\"-1\" FACE=\"verdana, arial, helvetica\" color=\"#000000\">", $results[2],"</font></td>\n";
print "<td><FONT SIZE=\"-1\" FACE=\"verdana, arial, helvetica\" color=\"#000000\">", $results[3],"</font></td>\n";
print "<td><FONT SIZE=\"-1\" FACE=\"verdana, arial, helvetica\" color=\"#000000\">", $results[4],"</font></td>\n";
print "<td><FONT SIZE=\"-1\" FACE=\"verdana, arial, helvetica\" color=\"#000000\">\$", $results[5],"</font></td>\n";
print "<td><FONT SIZE=\"-1\" FACE=\"verdana, arial, helvetica\" color=\"#000000\"><a href=\"http://cuzzart.com/usedhtml/$results[1].html\">Details</a></font></td>\n";
print "</tr>\n";
}
$prev_page = $reqpage - 1;
$next_page = $reqpage + 1;
if ($reqpage == 1) {
$prev_link = "";
} else {
$prev_link = " <a href=\"cgi-bin/results.pl?reqpage=$prev_page&pagesize=$pagesize\">" . "PREVIOUS" . "</a>";
}
if ($reqpage == $pagecount) {
$next_link = "";
} else {
$next_link = " <a href=\"cgi-bin/results.pl?reqpage=$next_page&pagesize=$pagesize\">" . "NEXT" . "</a>";
}
if ($pagecount > 1) {
$pagelinks = $prev_link;
$pageno = 0;
while ($pageno < $pagecount) {
$pageno++;
if ($pageno == $reqpage) {
$thislink = " <b>$pageno</b> ";
} else {
$thislink = " <a href=\"cgi-bin/results.pl?reqpage=$pageno&pagesize=$pagesize\">" . $pageno . "</a>";
}
$pagelinks = $pagelinks . $thislink;
}
$pagelinks = $pagelinks . " " . $next_link;
} else {
$pagelinks = "";
}
print "</table>";
print "$pagelinks";
if ($good ne 1){
print "No entries found\n";
}
</pre><HR></BLOCKQUOTE>
It's tough to follow the braces, but hopefully you will see what it's trying to do.
Just a suggestion, the following:
$pagecount = int($result_count / $pagesize);
if (($pagecount * $pagesize) != $result_count) {
$pagecount++;
}
can be done more briefly as follows:
$pagecount = int(($result_count+$pagesize-1) / $pagesize);
Also, with the above code, you wouldn't need to tally $result_count because you could use $#data+1 instead. $#data+1 is the number of entries in the array @data.
And, rather than:
if ($dude eq 0) { $color = '#D0D0D0';
$dude = 1;
}
else { $dude = 0;
$color = '#FFFFFF';
}
you could simply do:
if ($color eq '#FFFFFF')
{ $color = '#D0D0D0'; }
else
{ $color = '#FFFFFF'; }
or, even briefer:
$color=(($color eq '#FFFFFF')?('#D0D0D0')  '#FFFFFF'));
Good luck,
Dr. Zed
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