Selasa, 09 Juni 2015

On 21.45 by Zuhdi Amin   No comments

PHP & MySQL Tutorial | Pagination in Search Engine

206 Comments
For better understanding of the source code please watch the video first.
In this Post I will discuss about pagination in Search Engine using PHP & MySQL. I will use my search engine source code & add pagination to that script. So you can have a look at How to create a search engine in PHP first. That will definitely help you to understand easily.
Please create two page first. One is “index.php” & another one is “search.php”.
Then follow the steps written below:
At first create a table inside your database. create 4 columns inside that table. In my script I named those column as “id”, “title”, “description”, “url” . For “id” choose INT type, index it as PRIMARY & choose auto increment. For other fields you can simply choose the type as TEXT. Once you are done with the database then follow the instructions given below:
please paste this code inside index.php
STEP: 1
<html>
<head>
<title>Title of your search engine</title>
</head>
<body>
<form action='search.php' method='GET'>
<center>
<h1>My Search Engine</h1>
<input type='text' size='90' name='search'></br></br>
<input type='submit' name='submit' value='Search source code' ></br></br></br>
</center>
</form>
</body>
</html>
Then, please add this code inside search.php
<?php
   
$button = $_GET ['submit'];
$search = $_GET ['search']; 
 
if(strlen($search)<=1)
echo "Search term too short";
else{
echo "You searched for <b>$search</b> <hr size='1'></br>";
mysql_connect("mysql_host_name","mysql_username","mysql_password");
mysql_select_db("database_name");
   
$search_exploded = explode (" ", $search);

$x = "";
$construct = "";  
   
foreach($search_exploded as $search_each)
{
$x++;
if($x==1)
$construct .="title LIKE '%$search_each%'";
else
$construct .="AND title LIKE '%$search_each%'";
   
}
 
$constructs ="SELECT * FROM database_table_name WHERE $construct";
$run = mysql_query($constructs);
   
$foundnum = mysql_num_rows($run);
   
if ($foundnum==0)
echo "Sorry, there are no matching result for <b>$search</b>.</br></br>1. 
Try more general words. for example: If you want to search 'how to create a website'
then use general keyword like 'create' 'website'</br>2. Try different words with similar
 meaning</br>3. Please check your spelling";
else
{ 
 
echo "$foundnum results found !<p>";
 
$per_page = 1;
$start = isset($_GET['start']) ? $_GET['start']: '';
$max_pages = ceil($foundnum / $per_page);
if(!$start)
$start=0; 
$getquery = mysql_query("SELECT * FROM database_table_name WHERE $construct LIMIT $start, $per_page");
 
while($runrows = mysql_fetch_assoc($getquery))
{
$title = $runrows ['title'];
$desc = $runrows ['description'];
$url = $runrows ['url'];
  
echo "
<a href='$url'><b>$title</b></a><br>
$desc<br>
<a href='$url'>$url</a><p>
";
   
}
 
//Pagination Starts
echo "<center>";
 
$prev = $start - $per_page;
$next = $start + $per_page;
                      
$adjacents = 3;
$last = $max_pages - 1;
 
if($max_pages > 1)
{   
//previous button
if (!($start<=0)) 
echo " <a href='search.php?search=$search&submit=Search+source+code&start=$prev'>Prev</a> ";    
         
//pages 
if ($max_pages < 7 + ($adjacents * 2))   //not enough pages to bother breaking it up
{
$i = 0;   
for ($counter = 1; $counter <= $max_pages; $counter++)
{
if ($i == $start){
echo " <a href='search.php?search=$search&submit=Search+source+code&start=$i'><b>$counter</b></a> ";
}
else {
echo " <a href='search.php?search=$search&submit=Search+source+code&start=$i'>$counter</a> ";
}  
$i = $i + $per_page;                 
}
}
elseif($max_pages > 5 + ($adjacents * 2))    //enough pages to hide some
{
//close to beginning; only hide later pages
if(($start/$per_page) < 1 + ($adjacents * 2))        
{
$i = 0;
for ($counter = 1; $counter < 4 + ($adjacents * 2); $counter++)
{
if ($i == $start){
echo " <a href='search.php?search=$search&submit=Search+source+code&start=$i'><b>$counter</b></a> ";
}
else {
echo " <a href='search.php?search=$search&submit=Search+source+code&start=$i'>$counter</a> ";
} 
$i = $i + $per_page;                                       
}
                         
}
//in middle; hide some front and some back
elseif($max_pages - ($adjacents * 2) > ($start / $per_page) && ($start / $per_page) > ($adjacents * 2))
{
echo " <a href='search.php?search=$search&submit=Search+source+code&start=0'>1</a> ";
echo " <a href='search.php?search=$search&submit=Search+source+code&start=$per_page'>2</a> .... ";

$i = $start;                 
for ($counter = ($start/$per_page)+1; $counter < ($start / $per_page) + $adjacents + 2; $counter++)
{
if ($i == $start){
echo " <a href='search.php?search=$search&submit=Search+source+code&start=$i'><b>$counter</b></a> ";
}
else {
echo " <a href='search.php?search=$search&submit=Search+source+code&start=$i'>$counter</a> ";
}   
$i = $i + $per_page;                
}
                                 
}
//close to end; only hide early pages
else
{
echo " <a href='search.php?search=$search&submit=Search+source+code&start=0'>1</a> ";
echo " <a href='search.php?search=$search&submit=Search+source+code&start=$per_page'>2</a> .... ";

$i = $start;                
for ($counter = ($start / $per_page) + 1; $counter <= $max_pages; $counter++)
{
if ($i == $start){
echo " <a href='search.php?search=$search&submit=Search+source+code&start=$i'><b>$counter</b></a> ";
}
else {
echo " <a href='search.php?search=$search&submit=Search+source+code&start=$i'>$counter</a> ";   
} 
$i = $i + $per_page;              
}
}
}
         
//next button
if (!($start >=$foundnum-$per_page))
echo " <a href='search.php?search=$search&submit=Search+source+code&start=$next'>Next</a> ";    
}   
echo "</center>";
} 
} 
?>

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