CODEWITHSUNDEEP
javascriptphpjquerymysql
Ashish
Ashish

Reputation: 303

Load more when scroll to bottom from database using GET variables- PHP/ Mysqli

I want to load first 10 results on my webpage then a load more button to load next 10 result using AJAX on the same page. There can be two types of URLs of my web pages. 

1.  www.example.com/list.php?name=ABC&area=All
2.  www.example.com/list.php?name=ABC&area=BCD

If someone types URL manually and there is a mismatch in name and area means name or area doesn’t match to the database results than he/she will be redirected to error404.php.

Script:

<script type="text/javascript">
    var track_page = 1;
    load_contents(track_page);

    $("#load_more_button").click(function (e) { 
        track_page++; 
        load_contents(track_page);
    });

    function load_contents(track_page){
        $('.animation_image').show();

        $.post( 'fetch_pages.php', {'page': track_page}, function(data){

            if(data.trim().length == 0){
                $("#load_more_button").text("You have reached end of the record!").prop("disabled", true);
            }

            $("#results").append(data);

            $('.animation_image').hide();
        });
    }
</script>

list.php

$_SESSION['name']=$_GET['name'];
$_SESSION['area']=$_GET['area'];

<div class="wrapper">
    <div id="results"></div>

    <button id="load_more_button"><img src="ajax-loader.gif"  class="animation_image" style="float:left;"> Load More</button>
</div>

Fetch_pages.php

include("db.php");
$item_per_page = 10;
$page_number = filter_var($_POST["page"], FILTER_SANITIZE_NUMBER_INT, FILTER_FLAG_STRIP_HIGH);

$position = (($page_number-1) * $item_per_page);
$sort="id";
if(isset($_GET['sort'])&&($_GET['sort'])=='ASC'){
    $sort="price ASC";
}
elseif(isset($_GET['sort'])&&($_GET['sort'])=='DESC'){
    $sort="price DESC";
}
if($_SESSION['area']=='All'){
    $stmt = $mysqli->prepare("SELECT * from table where name= ? ORDER BY $sort LIMIT ?,?");
    $stmt->bind_param("sdd", $_SESSION['name'], $position, $item_per_page);
}
else{
    $stmt = $mysqli->prepare("SELECT * from table where name= ? AND area= ? ORDER BY $sort LIMIT ?,?");
    $stmt->bind_param("ssdd", $_SESSION['name'], $_SESSION['area'], $position, $item_per_page);
}
    $stmt->execute();
    $i=1;
    $res = $stmt->get_result();
    while($row4=mysqli_fetch_array($res)){
       ---------------
       ---------------
}

The above script works fine if no GET variable is available in URL. But If i want to load page content on basis of $_GET variable it gives an error that $_GET variable not defined. Where i need to define these variables.. I also have tried defining S_SESSION variables on fetch_pages.php along with list.php but it still gives an error.

What is the best way to do this ? Thanks....

Upvotes: 0

Views: 858

Answers (3)

B. Desai
B. Desai

Reputation: 16436

change your list.php like this to access data using both post and get

<?php
$_SESSION['name']=$_REQUEST['name'];
$_SESSION['area']=$_REQUEST['area'];
?>
<div class="wrapper">
    <div id="results"></div>

    <button id="load_more_button"><img src="ajax-loader.gif"  class="animation_image" style="float:left;"> Load More</button>

EDIT

If you don't have to use session try this:

<script type="text/javascript">
    var track_page = 1;
    load_contents(track_page);

    $("#load_more_button").click(function (e) { 
        track_page++; 
        load_contents(track_page);
    });

    function load_contents(track_page){
        $('.animation_image').show();

        $.post( 'fetch_pages.php', {'page': track_page,'name' : '<?=$_GET['name']?>',area:'<?=$_GET['area']?>'}, function(data){

            if(data.trim().length == 0){
                $("#load_more_button").text("You have reached end of the record!").prop("disabled", true);
            }

            $("#results").append(data);

            $('.animation_image').hide();
        });
    }
</script>

And in Fetch_pages.php change $_SESSION to $_POST

Upvotes: 1

user2200891
user2200891

Reputation:

You're not passing in the GET variables in your javascript, you have to supply name and area variables in your $.post call.

Also you are using $.post which makes the variables available via $_POST in PHP.

Upvotes: 0

craigmayhew
craigmayhew

Reputation: 134

Use $_POST instead of $_GET in php or send via $.get() in javascript. Currently your javascript is sending the data as post variables as the method $.post() is called to send the data back to the server.

Upvotes: 0

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