I'm trying to build a MySQL Search Engine.
It's in two parts.
PART 1 - search.php
Code: Select all
<?php
/* Program name: search.php
* Description: Search the family tree.
*/
echo "
<html>
<head>
<title>Search</title>
</head>
<body>
<form name='form' action='query.php' method='get'>
<input type='text' name='q' />
<input type='submit' name='Submit' value='Search' />
</form>";
?>
</body></html>Code: Select all
<?php
// Get the search variable from URL
$var = $_GET['q'] ; //search term passed by search.php
$trimmed = trim($var); //trim whitespace from the stored variable
// rows to return
$limit=10;
// check for an empty string and display a message.
if ($trimmed == "")
{
echo "<p>Please enter a search...</p>";
exit;
}
// check for a search parameter
if (!isset($var))
{
echo "<p>We dont seem to have a search parameter!</p>";
exit;
}
//connect to your database
include_once("*******.inc");
$cxn = mysql_connect("$host","$user","$password"); //(host, username, password)
//specify database
mysql_select_db($database) or die("Unable to select database");
// Build SQL Query
$query = "select * from tree where urn,surname,forename,yearofbirth like \"%$trimmed%\"
order by surname"; // EDIT HERE and specify your table and field names for the SQL query
$numresults=mysql_query($query);
$numrows=mysql_num_rows($numresults);
// If we have no results, offer a google search as an alternative
if ($numrows == 0)
{
echo "<h4>Results</h4>";
echo "<p>Sorry, your search: "" . $trimmed . "" returned zero results</p>";
// google
echo "<p><a href=\"http://www.google.com/search?q="
. $trimmed . "\" target=\"_blank\" title=\"Look up
" . $trimmed . " on Google\">Click here</a> to try the
search on google</p>";
}
// next determine if s has been passed to script, if not use 0
if (empty($s)) {
$s=0;
}
// get results
$query .= " limit $s,$limit";
$result = mysql_query($query) or die("Couldn't execute query");
// display what the person searched for
echo "<p>You searched for: "" . $var . ""</p>";
// begin to show results set
echo "Results";
$count = 1 + $s ;
// now you can display the results returned
while ($row= mysql_fetch_array($result)) {
$title = $row["1st_field"];
echo "$count.) $title" ;
$count++ ;
}
$currPage = (($s/$limit) + 1);
//break before paging
echo "<br />";
// next we need to do the links to other results
if ($s>=1) { // bypass PREV link if s is 0
$prevs=($s-$limit);
print " <a href=\"$PHP_SELF?s=$prevs&q=$var\"><<
Prev 10</a>  ";
}
// calculate number of pages needing links
$pages=intval($numrows/$limit);
// $pages now contains int of pages needed unless there is a remainder from division
if ($numrows%$limit) {
// has remainder so add one page
$pages++;
}
// check to see if last page
if (!((($s+$limit)/$limit)==$pages) && $pages!=1) {
// not last page so give NEXT link
$news=$s+$limit;
echo " <a href=\"$PHP_SELF?s=$news&q=$var\">Next 10 >></a>";
}
$a = $s + ($limit) ;
if ($a > $numrows) { $a = $numrows ; }
$b = $s + 1 ;
echo "<p>Showing results $b to $a of $numrows</p>";
?>Any clue as to what I'm doing wrong here? I didn't write the script. I've adapted it from an example one found on the web.Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource in /home/kdidymus/public_html/query.php on line 35
Results
Sorry, your search: "cosway" returned zero results
Click here to try the search on google
Couldn't execute query
Thanks in advance.
Kris.