PHP Search Help

[herghost]

Hi all,

 

I have this script which has basically been pinched from a tuturial and I have taken out bits I dont need etc.

 

The script I have left after I was finished effing about with it is:

 

<?php
include('include/database.php');


//specify how many results to display per page
$limit = 10;

// Get the search variable from URL
  $var = @$_GET['q'] ;
//trim whitespace from the stored variable
  $trimmed = trim($var); 
//separate key-phrases into keywords
  $trimmed_array = explode(" ",$trimmed);

// check for an empty string and display a message.
if ($trimmed == "") {
  $resultmsg =  "<p>Search Error</p><p>Please enter a search...</p>" ;
  }

// check for a search parameter
if (!isset($var)){
  $resultmsg =  "<p>Search Error</p><p>We don't seem to have a search parameter! </p>" ;
  }
// Build SQL Query for each keyword entered
foreach ($trimmed_array as $trimm){
     
// EDIT HERE and specify your table and field names for the SQL query
     $query = "SELECT * FROM user WHERE bandname LIKE \"%$trimm%\"  ORDER BY bandname   DESC" ; 
     // Execute the query to  get number of rows that contain search kewords
     $numresults=mysql_query ($query) or die(mysql_error());
     $row_num_links_main =mysql_num_rows ($numresults);


     // next determine if 's' has been passed to script, if not use 0.
     // 's' is a variable that gets set as we navigate the search result pages.
     if (empty($s)) {
         $s=0;
     }

      // now let's get results.
      $query .= " LIMIT $s,$limit" ;
      $numresults = mysql_query ($query) or die ( "Couldn't execute query" );
      $row= mysql_fetch_array ($numresults);

      //store record id of every item that contains the keyword in the array we need to do this to avoid display of duplicate search result.
      do{
//EDIT HERE and specify your field name that is primary key
          $adid_array[] = $row[ 'bandname' ];
      }while( $row= mysql_fetch_array($numresults));
} //end foreach

if($row_num_links_main == 0 && $row_set_num == 0){
   $resultmsg = "<p>Search results for:" . $trimmed  ."</p><p>Sorry, your search returned zero results</p>" ;
}
   //delete duplicate record id's from the array. To do this we will use array_unique function
   $tmparr = array_unique($adid_array);
   $i=0;
   foreach ($tmparr as $v) {
       $newarr[$i] = $v; 
       $i++;
   }

// now you can display the results returned. But first we will display the search form on the top of the page
?>

<form action="search.php" method="get" name="search">
  <div align="center">
      <input name="q" type="text" value=" <?php echo $q; ?> " size="15">
      <input name="search" type="submit" value="Search">
  </div>
</form>

<?php
// display what the person searched for.
if( isset ($resultmsg)){
  echo $resultmsg;
  exit();
}else{
  echo "Search results for: " . $var;
}

foreach($newarr as $value){

// EDIT HERE and specify your table and field names for the SQL query
$query_value = "SELECT * FROM user WHERE bandname = '$value'";
$num_value=mysql_query ($query_value);
$row_linkcat= mysql_fetch_array ($num_value);
$row_num_links= mysql_num_rows ($num_value);

//now let's make the keywods bold. To do that we will use preg_replace function.
//EDIT parts of the lines below that have fields names like $row_linkcat[ 'field1' ]
//This script assumes you are searching only 3 fields. If you are searching more fileds make sure that add appropriate line. 
  $titlehigh = preg_replace ( "'($var)'si" , "<b>\\1</b>" , $row_linkcat[ 'bandname' ] );

  

foreach($trimmed_array as $trimm){
    if($trimm != 'b' ){
//IF you added more fields to search make sure to add them below as well.
        $titlehigh = preg_replace( "'($trimm)'si" ,  "<b>\\1</b>" , $titlehigh);
       
        
     }
//end highlight

?>
<p>
<?php echo $titlehigh; ?><br>


</p>

<?php
}   //end foreach $trimmed_array 
   if($row_num_links_main > $limit){
   // next we need to do the links to other search result pages
      if ($s>=1) { // do not display previous link if 's' is '0'
        $prevs=($s-$limit);
         echo "<div align='left'><a href='$PHP_SELF?s=$prevs&q=$var&catid=$catid'>Previous " .$limit. "</a></div>";
      }
     // check to see if last page
     $slimit =$s+$limit;
       if (!($slimit >= $row_num_links_main) && $row_num_links_main!=1) {
     // not last page so display next link
          $n=$s+$limit;
           echo "<div align='right'><a href='$PHP_SELF?s=$n&q=$var&catid=$catid'>Next " .$limit. "</a></div>";
        }
    }
}  //end foreach $newarr
?>

 

Which is currently stored as search.php.

 

here goes the questions!

 

If the user is on search.php then everything displays fine, however I also have this search bar in my header.php which appears on every page on the site. If the user is on index.php, then in the search bar I get an error message:

 

Notice  Undefined variable: q in include\header.php on line 8  

 

I understand that q is the search variable present once the box has been filled in but I dont know how to use the search bar here without the error appearing.

 

My other question is somewhat different.

 

i also want the search to find the userid of the bandname and display it as so <a href="newprofile.php?userid=(idhere)">View This Band</a> The userid is the same table 'user' an is an auto increment so auto assigned when a user signs up. I understand I can use something like this:

 

<?php $sql = "SELECT * FROM user WHERE userid = '$userid'";
$result = mysql_query($sql) or die(mysql_error());
while($row = mysql_fetch_array($result))
{ 
  {  echo $row['userid'];   
  }
} 	?>

 

but not sure if this is the best way and how to implement this into the script. i have to admit, this script is a bit past my basic knowledge I am slowly building up of php!

 

Many thanks as always

[Gighalen]

In response to your first question, your query seems to only run on search.php. This means that the variable q is only declared on search.php, and is not available to any other pages.

[herghost]

I managed to sort that one by just removing the line

 

Now on to the second one....

[Gighalen]

In your search query on the display page, your using a SELECT *, so you're getting all the data from the database about that one band - including ID. Just find where it echos out and add the <a href> stuff around the ['bandname'] variable.

 

Make sure to avoid " by using \"