Search Next Page

Smee · April 30, 2010

Hi,

I have a working search that i need a tutorial or some help where the PHP shows a next page link if more results are given than a certain amount specified. If anyone can give me some advice or decent tutorial i'd be very grateful.

Thanks

<?php 

// This script allows us to search our database

require_once ('./includes/config.inc.php');

$page_title = 'Search';

include_once ('./includes/header.html');

?>

<div id="search">

<h1> Search </h1>

<form action="search.php?go" method="post" />

<p class="post_code"><label> Post Code: </label>
<input type="text" name="post_code" maxlength="40" />

<p class="team_supported"><label> Team Supported: </label>
<input type="text" name="team_supported" maxlength="40" />

<p class="submit">
<input type="submit" name="submit" value="Search" />
            
</form>

</div>

<div id="searchconfirmation">

<?php

$error = false;

if (isset($_POST['submit'])) {

if(isset($_GET['go'])){ 

require_once ('../mysql_connect.php');

$error = false;
if (preg_match ('/^[[:alnum:]]{4,20}$/i', stripslashes(trim($_POST['post_code'])))) {
$pc = $_POST['post_code'];

} else {
      
   echo '<center><p><font color ="red">Please enter the first 4 letters of your Post Code!</font></p></center>';
   $error = true;
   
}

$ts = $_POST['team_supported'];

if (!$error) {
      
  //-query  the database table 

      $query = "SELECT first_name, last_name, email, post_code, team_supported FROM users WHERE post_code LIKE '%" . $pc .  "%' AND team_supported LIKE '%" . $ts .  "%'"; 

  //-run  the query against the mysql query function

      $result = mysql_query ($query) or trigger_error("Query: $query\n<br />MySQL Error: ".mysql_error());
  
?>

<table width="600" height="100" border="0" />
<thead>	  
  <tr>
    <th scope="col">First Name</th>
    <th scope="col">Last Name</th>
    <th scope="col">E Mail</th>
    <th scope="col">Post Code</th>
    <th scope="col">Team Supported</th>
    <th scope="col">Attending</th>  
  </tr>
</thead>

<tfoot>
<tr>
<th scope="row">Total</th>
<td colspan="4">85 designs</td>
</tr>
</tfoot>



<?php  

  //-create  while loop and loop through result set 

  while($row=mysql_fetch_array($result)){ 
          $fn = $row['first_name'];
          $ln = $row['last_name'];
          $em = $row['email'];
          $pc = $row['post_code'];
		  $ts = $row['team_supported'];			  
?>

<tbody>
   <tr>
    <td><?php echo "$fn"; ?></td>
    <td><?php echo "$ln"; ?></td>
    <td><?php echo "<a href=mailto:" . $em .  ">" . $em . ""; ?></td>
    <td><?php echo "$pc"; ?></td>
    <td><?php echo "$ts"; ?></td>
    <td></td>
  </tr> 
</tbody>

<?php			  
   
  }
  
  } else { 
  echo  '<center><p><font color="red">Please enter a search query</font></p></center>'; 
  } 
  }
  
}	  

?> 

</div>

<?php
include ('./includes/footer.html');
?>

ChemicalBliss · May 1, 2010

You want pagination.

Use the forum search feature for pagination.

-cb-

Smee · May 1, 2010

Thanks for the reply!

I found a good tutorial in the PHP Freaks tut section and followed in but cant see why im getting the error:

Parse error: syntax error, unexpected T_IF in search.php on line 72

IF statement on line 72 is:

if (isset($_GET['currentpage']) && is_numeric($_GET['currentpage'])) {
   
   $currentpage = (int) $_GET['currentpage'];
} else {

   $currentpage = 1;
}

The rest of the code now looks like this.. Any suggestions?

Thanks


<?php 

// This script allows us to search our database

require_once ('./includes/config.inc.php');

$page_title = 'Search';

include_once ('./includes/header.html');

?>

<div id="search">

<h1> Search </h1>

<form action="search.php?go" method="post" />

<p class="post_code"><label> Post Code: </label>
<input type="text" name="post_code" maxlength="40" />

<p class="team_supported"><label> Team Supported: </label>
<input type="text" name="team_supported" maxlength="40" />

<p class="submit">
<input type="submit" name="submit" value="Search" />
            
</form>

</div>

<div id="searchconfirmation">

<?php

$error = false;

if (isset($_POST['submit'])) {

if(isset($_GET['go'])){ 

require_once ('../mysql_connect.php');	

$error = false;
if (preg_match ('/^[[:alnum:]]{4,20}$/i', stripslashes(trim($_POST['post_code'])))) {
$pc = $_POST['post_code'];

} else {
      
   echo '<center><p><font color ="red">Please enter the first 4 letters of your Post Code!</font></p></center>';
   $error = true;
   
}

$ts = $_POST['team_supported'];

if (!$error) {
      
$query = "SELECT  COUNT(*) FROM users WHERE post_code LIKE '%" . $pc .  "%' AND team_supported LIKE '%" . $ts .  "%'";
$result = mysql_query($query) or trigger_error("Query: $query\n<br />MySQL Error: ".mysql_error());
$r = mysql_fetch_row($result);
$numrows = $r[0];


$rowsperpage = 5;

$totalpages = ceil($numrows / $rowsperpage)


if (isset($_GET['currentpage']) && is_numeric($_GET['currentpage'])) {
   
   $currentpage = (int) $_GET['currentpage'];
} else {
  
   $currentpage = 1;
} 


if ($currentpage > $totalpages) {
   
   $currentpage = $totalpages;
} 

if ($currentpage < 1) {
   
   $currentpage = 1;
} 

$offset = ($currentpage - 1) * $rowsperpage;

$query = "SELECT SELECT first_name, last_name, email, post_code, team_supported FROM users LIMIT $offset, $rowsperpage";

$result = mysql_query ($query) or trigger_error("Query: $query\n<br />MySQL Error: ".mysql_error());
  
?>

<table width="600" height="100" border="0" />
<thead>	  
  <tr>
    <th scope="col">First Name</th>
    <th scope="col">Last Name</th>
    <th scope="col">E Mail</th>
    <th scope="col">Post Code</th>
    <th scope="col">Team Supported</th>
    <th scope="col">Attending</th>  
  </tr>
</thead>

<tfoot>
<tr>
<th scope="row">Total</th>
<td colspan="4">85 designs</td>
</tr>
</tfoot>



<?php  

  //-create  while loop and loop through result set 

  while($row=mysql_fetch_array($result)){ 
          $fn = $row['first_name'];
          $ln = $row['last_name'];
          $em = $row['email'];
          $pc = $row['post_code'];
		  $ts = $row['team_supported'];			  
?>

<tbody>
   <tr>
    <td><?php echo "$fn"; ?></td>
    <td><?php echo "$ln"; ?></td>
    <td><?php echo "<a href=mailto:" . $em .  ">" . $em . ""; ?></td>
    <td><?php echo "$pc"; ?></td>
    <td><?php echo "$ts"; ?></td>
    <td></td>
  </tr> 
</tbody>

<?php


$range = 3;


if ($currentpage > 1) {
   
   echo " <a href='{$_SERVER['PHP_SELF']}?currentpage=1'><<</a> ";
  
   $prevpage = $currentpage - 1;
  
   echo " <a href='{$_SERVER['PHP_SELF']}?currentpage=$prevpage'><</a> ";
}


for ($x = ($currentpage - $range); $x < (($currentpage + $range) + 1); $x++) {
   
   if (($x > 0) && ($x <= $totalpages)) {
     
      if ($x == $currentpage) {
         
         echo " [<b>$x</b>] ";
      
      } else {
         
         echo " <a href='{$_SERVER['PHP_SELF']}?currentpage=$x'>$x</a> ";
      } 
   }  
} 
                       
if ($currentpage != $totalpages) {
  
   $nextpage = $currentpage + 1;
    
   echo " <a href='{$_SERVER['PHP_SELF']}?currentpage=$nextpage'>></a> ";

   echo " <a href='{$_SERVER['PHP_SELF']}?currentpage=$totalpages'>>></a> ";
} 
   
  }
  
  } else { 
  echo  '<center><p><font color="red">Please enter a search query</font></p></center>'; 
  } 
  }
  
}	  

?> 

</div>

<?php
include ('./includes/footer.html');
?>

ChemicalBliss · May 1, 2010

Common syntax errors 'unexpected ...' are simple, for exampe, in this case you missed an end-line operator:

$totalpages = ceil($numrows / $rowsperpage)

should be:

$totalpages = ceil($numrows / $rowsperpage);

-cb-

mikesta707 · May 1, 2010

missing a semi colon on this line

$totalpages = ceil($numrows / $rowsperpage)

should be

$totalpages = ceil($numrows / $rowsperpage);

just a tip, when you have parse errors and you just cant see whats wrong with the line it specifies, look to the line(s) above

ChemicalBliss · May 1, 2010

Mikesta do you make a habit of copying responses? Just wondering since i see no reason why you would do it other than to steal credit? strange..

-cb-

Smee · May 1, 2010

Awesome it worked a treat!

made a similar mistake further down as well!

Well it works but i understand that because no results show on my second page they are not being passed over.

Do i need to pass them through a URL or something?

Sorry new to this

Thanks again!

ChemicalBliss · May 1, 2010

Personally, to save mysql data calls, i would store the initial result of the search query in a session variable array.

Then you dont have to worry about passing or searching the db for each page.

First, when the the form is submitted, do a while loop like so:

$result = mysql_query(searchquery...);
$_SESSION['search_result'] = array(); // this is so if they search again the results overwrite instead of get added.
while($row = mysql_fetch_array($result)){
   $_SESSION['search_result'][] = $row;
}

Then on the page you would do pagination normally, except where you grab the rows from, do something like:

$rowsperpage = 5;
$currentpage = 3; // just to show you an example
$totalrows = count($_SESSION['search_result']; // say for example 20 rows (index starts at 0).
$offset = ($currentpage - 1) * $rowsperpage; // would equal: (3 - 1) * 5 = 10;

for($i=$offset;$i<($offset+$rowsperpage);$i++){
   echo('Search result: '.$_SESSION['search_result'][$i]['name'].'<br />');
}

this is a small example. Will save you effort/time and money in the long run.

-cb-

mikesta707 · May 1, 2010

sorry, didn't even realize you posted before I did. that reply certainly wasn't there before I posted. Must have missed the "replys were made while you were posting" error while posting.

No need to be so touchy, an honest mistake of course, not to mention double posts are common on most help forums

ChemicalBliss · May 1, 2010

Not touchy, thought more time had passed since my answer and yours, thought you would of had to read my question before replying o in my eyes, you already knew i posted. anyway;

Having been pm'd this:

Hi mate,

Hope you dont mind me PM'ing you but im reallyt struggerling with this and its driving me round the bend

You seem to really know what your talking about where as i really don't! Thanks for your latest reply but its really not making a lot of sense to me.


$query = "SELECT first_name, last_name, email, post_code, team_supported FROM users LIMIT $offset, $rowsperpage";

$result = mysql_query ($query) or trigger_error("Query: $query\n<br />MySQL Error: ".mysql_error());
$_SESSION['search_result'] = array(); // this is so if they search again the results overwrite instead of get added.
while($row = mysql_fetch_array($result)){
$_SESSION['search_result'][] = $row;
}

This is what i have added and have tried adding something to the URL link like:


echo " <a href='{$_SERVER['PHP_SELF']}?currentpage=$x&find={$_SESSION['search_result']}'></a> ";

i know you mentioned putting it into a session to make it easier in the long run but with my lack of knowledge i was wondering if you could give me an example of how my code could work in the simplist way possible? The website im making is nothing special an only need the basics doing. If you dont have tim or simply can't be bothered then i totally understand!

Anyway here is the script i have:


<?php 

// This script allows us to search our database

require_once ('./includes/config.inc.php');

$page_title = 'Search';

include_once ('./includes/header.html');

?>

<div id="search">

<h1> Search </h1>

<form action="search.php?go" method="post" />

<p class="post_code"><label> Post Code: </label>
<input type="text" name="post_code" maxlength="40" />

<p class="team_supported"><label> Team Supported: </label>
<input type="text" name="team_supported" maxlength="40" />

<p class="submit">
<input type="submit" name="submit" value="Search" />
            
</form>

</div>

<div id="searchconfirmation">

<?php

$error = false;

if (isset($_POST['submit'])) {

if(isset($_GET['go'])){ 

require_once ('../mysql_connect.php');	

$error = false;
if (preg_match ('/^[[:alnum:]]{4,20}$/i', stripslashes(trim($_POST['post_code'])))) {
$pc = $_POST['post_code'];

} else {
      
   echo '<center><p><font color ="red">Please enter the first 4 letters of your Post Code!</font></p></center>';
   $error = true;
   
}

$ts = $_POST['team_supported'];

if (!$error) {

$query = "SELECT COUNT(*) FROM users WHERE post_code LIKE '%" . $pc .  "%' AND team_supported LIKE '%" . $ts .  "%'";
$result = mysql_query($query) or trigger_error("Query: $query\n<br />MySQL Error: ".mysql_error());
$r = mysql_fetch_row($result);
$numrows = $r[0];

// number of rows to show per page
$rowsperpage = 5;

$totalpages = ceil($numrows / $rowsperpage);


if (isset($_GET['currentpage']) && is_numeric($_GET['currentpage'])) {
  
   $currentpage = (int) $_GET['currentpage'];
} else {
   
   $currentpage = 1;
} 


if ($currentpage > $totalpages) {
   
   $currentpage = $totalpages;
}

if ($currentpage < 1) {
   
   $currentpage = 1;
} 

$offset = ($currentpage - 1) * $rowsperpage;

$query = "SELECT first_name, last_name, email, post_code, team_supported FROM users LIMIT $offset, $rowsperpage";

$result = mysql_query ($query) or trigger_error("Query: $query\n<br />MySQL Error: ".mysql_error());
$_SESSION['search_result'] = array(); // this is so if they search again the results overwrite instead of get added.
while($row = mysql_fetch_array($result)){
$_SESSION['search_result'][] = $row;
}
  
?>

<table width="600" height="100" border="0" />
<thead>	  
  <tr>
    <th scope="col">First Name</th>
    <th scope="col">Last Name</th>
    <th scope="col">E Mail</th>
    <th scope="col">Post Code</th>
    <th scope="col">Team Supported</th>
    <th scope="col">Attending</th>  
  </tr>
</thead>

<tfoot>
<tr>
<th scope="row">Total</th>
<td colspan="4">85 designs</td>
</tr>
</tfoot>



<?php

  while($row=mysql_fetch_array($result)){ 
          $fn = $row['first_name'];
          $ln = $row['last_name'];
          $em = $row['email'];
          $pc = $row['post_code'];
		  $ts = $row['team_supported'];			  
?>

<tbody>
   <tr>
    <td><?php echo "$fn"; ?></td>
    <td><?php echo "$ln"; ?></td>
    <td><?php echo "<a href=mailto:" . $em .  ">" . $em . ""; ?></td>
    <td><?php echo "$pc"; ?></td>
    <td><?php echo "$ts"; ?></td>
    <td></td>
  </tr> 
</tbody>

<?php

$range = 3;


if ($currentpage > 1) {
   
   echo " <a href='{$_SERVER['PHP_SELF']}?currentpage=1&find={$_SESSION['search_result']}'><<</a> ";
   
   $prevpage = $currentpage - 1;
   
   echo " <a href='{$_SERVER['PHP_SELF']}?currentpage=$prevpage&find={$_SESSION['search_result']}'><</a> ";
} 


for ($x = ($currentpage - $range); $x < (($currentpage + $range) + 1); $x++) {
  
   if (($x > 0) && ($x <= $totalpages)) {
      
      if ($x == $currentpage) {
         
         echo " [<b>$x</b>] ";
      
      } else {
         
         echo " <a href='{$_SERVER['PHP_SELF']}?currentpage=$x&find={$_SESSION['search_result']}'></a> ";
      } 
   } 
} 
                 
      
if ($currentpage != $totalpages) {
  
   $nextpage = $currentpage + 1;
   
   echo " <a href='{$_SERVER['PHP_SELF']}?currentpage=$nextpage&find={$_SESSION['search_result']}'>></a> ";
  
   echo " <a href='{$_SERVER['PHP_SELF']}?currentpage=$totalpages&find={$_SESSION['search_result']}'>>></a> ";
} 

   
  }
  
  } else { 
  echo  '<center><p><font color="red">Please enter a search query</font></p></center>'; 
  } 
  }
  
}	  

?> 

</div>

<?php
include ('./includes/footer.html');
?>

Cheers for everything

Smee

I will reply with this, here:


<?php 
session_start();	// Tell php we're using sessions.

// This script allows us to search our database

require_once ('./includes/config.inc.php');

$page_title = 'Search';

include_once ('./includes/header.html');

?>

<div id="search">

<h1> Search </h1>

<form action="search.php?go" method="post" />

   <p class="post_code"><label> Post Code: </label>
<input type="text" name="post_code" maxlength="40" />

   <p class="team_supported"><label> Team Supported: </label>
<input type="text" name="team_supported" maxlength="40" />

   <p class="submit">
<input type="submit" name="submit" value="Search" />
           
</form>

</div>

<div id="searchconfirmation">

<?php
if(isset($_POST['submit'])){ // Search form
	// Do the search query here first:
	require_once ('../mysql_connect.php');

	// Santize Post code and team supported. (Santitize both, never use trim or other similar functions when santizing input.)
	$error = null;
	if (
		preg_match ('/^[[:alnum:]]{4,20}$/i', $_POST['post_code']) && 
		preg_match ('/^[[:alnum:] ]{4,30}$/i', $_POST['team_supported'])
	) {

		// Select every column from the table where conditions match:
		$query = "SELECT * FROM users WHERE 
			post_code LIKE '%" . $_POST['post_code'] .  "%' AND 
			team_supported LIKE '%" . $_POST['team_supported'] .  "%'";
		$result = mysql_query($query) or trigger_error("Query: $query\n<br />MySQL Error: ".mysql_error());

		// Do the while loop to add each row to the SESSION array:
		$_SESSION['search_result'] = array();
		while($row = mysql_fetch_array($result)){
			$_SESSION['search_result'][] = $row;
		}

	} else {
		// Save error as string, so we can use it how we wish later.
		$error = '<center><p><font color ="red">Post code or Team Supported contains either; one or more invalid characters, or too many/too little characters.</font></p></center>';
	}
}
if(!isset($_SESSION['search_result']) || $error != null){ // No Search or errors
	echo(($error != null)? $error : "Please submit a Search query");
}else{
	// Display the search results.
	$rowsperpage = 5;
	$totalrows = count($_SESSION['search_result']); // Count number of array items in the session variable array
	$totalpages = ceil($totalrows / $rowsperpage); // Get total number of pages in result
	$thispage = (isset($_GET['page']) && is_numeric($_GET['page']))? $_GET['page'] : 0; // Set the page number (minimum 0)
	$thispage = ($thispage > $totalpages)? $totalpages : $thispage; // Make sure the page number isnt over the totalpages.
	$offset = ($thispage <= 0)? 0 : (($thispage - 1) * $rowsperpage); // Get the row offset (starting row)

	echo('
		<table width="600" height="100" border="0" />
		<thead>    
		  <tr>
			<th scope="col">First Name</th>
			<th scope="col">Last Name</th>
			<th scope="col">E Mail</th>
			<th scope="col">Post Code</th>
			<th scope="col">Team Supported</th>
			<th scope="col">Attending</th> 
		  </tr>
		</thead>'); // End echoing header.

	// Loop through each result and echo it.
	for($i=$offset;$i<$totalrows;$i++){
		echo('
			<tbody>
				<tr>
					<td>'.$_SESSION['search_result'][$i]['first_name'].'</td>
					<td>'.$_SESSION['search_result'][$i]['last_name'].'</td>
					<td><a href="mailto:'.$_SESSION['search_result'][$i]['email'].'">'.$_SESSION['search_result'][$i]['email'].'</a></td>
					<td>'.$_SESSION['search_result'][$i]['post_code'].'</td>
					<td>'.$_SESSION['search_result'][$i]['team_supported'].'</td>
					<td></td>
				</tr>
			</tbody>'); // End echoing result.
	}

	echo('
		<tfoot>
		   <tr>
		   <th scope="row">Total</th>
		   <td colspan="4">85 designs</td>
		   </tr>
		</tfoot></table>'); // End echoing footer.
}
?>

</div>

<?php

// Previosu and Next links
echo(
'<a href="'.$_SERVER['PHP_SELF'].'?page='.((($thispage-1) <= 0)? 0 : $thispage-1).'">Previous Page</a>
- <a href="'.$_SERVER['PHP_SELF'].'?page='.((($thispage+1) <= 0)? 0 : $thispage+1).'">Next Page</a>'
);

// Footer
include ('./includes/footer.html');

?>

Take note of the comments, you had a lot of code you didnt need and some of your logic was superfluous. Try to get a more streamlined understanding of how php works, sessions can be simple once you have used them a few times. Really read through the code and understand it, anything you dont understand feel free to ask.

-cb-

EDIT: Modified the error handling of incorrect characters, most simplest form, you can make it more accurate quite easily.

Smee · May 1, 2010

Your an absolute legend, i cant thank you enough!

Im going to go over it tomorrow as its very late. All i will say is that it comes up with an error of:

an error occured in the script '/home/footba33/public_html/search.php' on 78

Undefined variable: error


if(!isset($_SESSION['search_result']) || $error != null){ // No Search or errors
echo(($error != null)? $error : "Please submit a Search query");

}

Thanks again!

ChemicalBliss · May 1, 2010

oops, nothing serious - to fix that error just move $error = null; above the isset condition:

	if(isset($_POST['submit'])){ // Search form
	// Do the search query here first:
	require_once ('../mysql_connect.php');

	// Santize Post code and team supported. (Santitize both, never use trim or other similar functions when santizing input.)
	$error = null;

should be:

$error = null;
if(isset($_POST['submit'])){ // Search form
	// Do the search query here first:
	require_once ('../mysql_connect.php');

	// Santize Post code and team supported. (Santitize both, never use trim or other similar functions when santizing input.)

-cb-

Smee · May 1, 2010

Another one bites the dust

Well it all works! Just when you click search with no content:

an error occured in the script '/home/footba33/public_html/search.php' on 143:

Undefined variable: thispage

which is the two at the bottom of the script.

echo(

'<a href="'.$_SERVER['PHP_SELF'].'?page='.((($thispage-1) <= 0)? 0 : $thispage-1).'">Previous Page</a>
- <a href="'.$_SERVER['PHP_SELF'].'?page='.((($thispage+1) <= 0)? 0 : $thispage+1).'">Next Page</a>'

);

ChemicalBliss · May 1, 2010

I'm glad its working!

Undefined variable just means that the variable doesnt exist. To get rid of them, jsut do a if condition - if there is no results, dot display the links. eg;

if(isset($thispage)){
   // show links
}

-cb-

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