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I am Ram, a Web Designer and Developer.   More than 4  years of experience in software development. Created complex back-end management systems including content management, e-commerce, customer relations and communication interfaces. The projects based on PHP in conjunction. PHP, SQL, JavaScript, AJAX, XHTML, CSS (Responsive), I help people make beautiful websites, functional applications and seamless user experiences.

Wednesday, 26 October 2016

Ajax Add & Delete MySQL records using jQuery & PHP

 Demo - Download




1st create a MySQL table called add_delete_record.

CREATE TABLE IF NOT EXISTS `add_delete_record` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `content` text NOT NULL,
  PRIMARY KEY (`id`)
) AUT


 config.php

<?php $username = "root";   $password = "" $hostname = "localhost";  
$databasename = 'mysql_table';   
$mysqli = new mysqli($hostname, $username, $password, $databasename); ?>
 

 Index.php

 <html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Ajax Add/Delete a Record with jQuery Fade In/Fade Out</title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.0/jquery.min.js"></script>

<script type="text/javascript">
$(document).ready(function() {

    //##### send add record Ajax request to response.php #########
    $("#FormSubmit").click(function (e) {
            e.preventDefault();
            if($("#contentText").val()==='')
            {
                alert("Please enter some text!");
                return false;
            }
          
            $("#FormSubmit").hide(); //hide submit button
            $("#LoadingImage").show(); //show loading image
           
             var myData = 'content_txt='+ $("#contentText").val(); //build a post data structure
            jQuery.ajax({
            type: "POST", // HTTP method POST or GET
            url: "response.php", //Where to make Ajax calls
            dataType:"text", // Data type, HTML, json etc.
            data:myData, //Form variables
            success:function(response){
                $("#responds").append(response);
                $("#contentText").val(''); //empty text field on successful
                $("#FormSubmit").show(); //show submit button
                $("#LoadingImage").hide(); //hide loading image

            },
            error:function (xhr, ajaxOptions, thrownError){
                $("#FormSubmit").show(); //show submit button
                $("#LoadingImage").hide(); //hide loading image
                alert(thrownError);
            }
            });
    });

    //##### Send delete Ajax request to response.php #########
    $("body").on("click", "#responds .del_button", function(e) {
         e.preventDefault();
         var clickedID = this.id.split('-'); //Split ID string (Split works as PHP explode)
         var DbNumberID = clickedID[1]; //and get number from array
         var myData = 'recordToDelete='+ DbNumberID; //build a post data structure
       
        $('#item_'+DbNumberID).addClass( "sel" ); //change background of this element by adding class
        $(this).hide(); //hide currently clicked delete button
       
            jQuery.ajax({
            type: "POST", // HTTP method POST or GET
            url: "response.php", //Where to make Ajax calls
            dataType:"text", // Data type, HTML, json etc.
            data:myData, //Form variables
            success:function(response){
                //on success, hide  element user wants to delete.
                $('#item_'+DbNumberID).fadeOut();
            },
            error:function (xhr, ajaxOptions, thrownError){
                //On error, we alert user
                alert(thrownError);
            }
            });
    });

});
</script>
<link href="css/style.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div class="content_wrapper">
<ul id="responds">
<?php
//include db configuration file
include_once("config.php");

//MySQL query
$results = $mysqli->query("SELECT id,content FROM add_delete_record");
//get all records from add_delete_record table
while($row = $results->fetch_assoc())
{
  echo '<li id="item_'.$row["id"].'">';
  echo '<div class="del_wrapper"><a href="#" class="del_button" id="del-'.$row["id"].'">';
  echo '<img src="images/icon_del.gif" border="0" />';
  echo '</a></div>';
  echo $row["content"].'</li>';
}

//close db connection
$mysqli->close();
?>
</ul>
    <div class="form_style">
    <textarea name="content_txt" id="contentText" cols="45" rows="5" placeholder="Enter some text"></textarea>
    <button id="FormSubmit">Add record</button>
    <img src="images/loading.gif" id="LoadingImage" style="display:none" />
    </div>
</div>

</body>
</html>




response.php

 <?php
//include db configuration file
include_once("config.php");

if(isset($_POST["content_txt"]) && strlen($_POST["content_txt"])>0)
{    //check $_POST["content_txt"] is not empty

    //sanitize post value, PHP filter FILTER_SANITIZE_STRING, FILTER_FLAG_STRIP_HIGH Strip tags, encode special characters.
    $contentToSave = filter_var($_POST["content_txt"],FILTER_SANITIZE_STRING, FILTER_FLAG_STRIP_HIGH);
  
    // Insert sanitize string in record
    $insert_row = $mysqli->query("INSERT INTO add_delete_record(content) VALUES('".$contentToSave."')");
  
    if($insert_row)
    {
         //Record was successfully inserted, respond result back to index page
          $my_id = $mysqli->insert_id; //Get ID of last inserted row from MySQL
          echo '<li id="item_'.$my_id.'">';
          echo '<div class="del_wrapper"><a href="#" class="del_button" id="del-'.$my_id.'">';
          echo '<img src="images/icon_del.gif" border="0" />';
          echo '</a></div>';
          echo $contentToSave.'</li>';
          $mysqli->close(); //close db connection

    }else{
      
        //header('HTTP/1.1 500 '.mysql_error()); //display sql errors.. must not output sql errors in live mode.
        header('HTTP/1.1 500 Looks like mysql error, could not insert record!');
        exit();
    }

}
elseif(isset($_POST["recordToDelete"]) && strlen($_POST["recordToDelete"])>0 && is_numeric($_POST["recordToDelete"]))
{    //do we have a delete request? $_POST["recordToDelete"]

    //sanitize post value, PHP filter FILTER_SANITIZE_NUMBER_INT removes all characters except digits, plus and minus sign.
    $idToDelete = filter_var($_POST["recordToDelete"],FILTER_SANITIZE_NUMBER_INT);
  
    //try deleting record using the record ID we received from POST
    $delete_row = $mysqli->query("DELETE FROM add_delete_record WHERE id=".$idToDelete);
  
    if(!$delete_row)
    {  
        //If mysql delete query was unsuccessful, output error
        header('HTTP/1.1 500 Could not delete record!');
        exit();
    }
    $mysqli->close(); //close db connection
}
else
{
    //Output error
    header('HTTP/1.1 500 Error occurred, Could not process request!');
    exit();
}
?>

 Demo - Download

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