crud in php codeigniter

Select Insert Update Delete Record using PHP | crud in php codeigniter

PHP CRUD Create, edit, update and delete posts with MySQL database | crud in php codeigniter

What is CRUD

CRUD is an acronym for Create, Read, Update, and Delete. CRUD operations are basic data manipulation for databases. We’ve already learned how to perform create (i.e. insert), read (i.e. select), update and delete operations in previous chapters. In this tutorial, we’ll create a simple PHP application to perform all these operations on a MySQL database table in one place.

Well, let’s start by creating the table which we’ll use in all of our examples.

DataGrid with CRUD operations is the most used functionality for the data management section. Generally, the web page is reloaded when the CRUD operation occurs. To make the web application user-friendly, you can integrate the CRUD functionality without page refresh. The EasyUI framework provides an easy way to integrate DataGrid with CRUD feature in the web application.

EasyUI is a jQuery framework that helps to build modern and interactive DataGrid CRUD applications quickly. The DataGrid functionality can be integrated into the web page in less time by writing less code. The jQuery EasyUI allows interacting with the server-side script to make the DataGrid more powerful. In this tutorial, we will show you how to build CRUD with search and pagination using EasyUI, PHP, and MySQL.

crud in php codeigniter

In the EasyUI integration example code, the following functionality will be implemented.

  • Fetch data from the database and list them in a tabular format.
  • Add/Edit data in the dialogue window without page refresh.
  • Delete data from the database without page refresh.
  • Add the search and pagination feature to the list.

jQuery EasyUI Integration

The following code shows how to integrate the jQuery EasyUI plugin in the web page to build a CRUD application and create or edit user information using the dialogue component.

 

  1. Include the CSS and JavaScript files of the EasyUI plugin on the web page.

Link Tag

link rel=”stylesheet”  type=”text/css” href=”easyui/themes/default/easyui.css”

link rel=”stylesheet” type=”text/css” href=”easyui/themes/icon.css”

Script tag

script type=”text/javascript” src=”easyui/jquery.min.jsscript type=”text/javascript” src=”easyui/jquery.easyui.min.js

 

  1. Add HTML code for data list table and toolbar.
  • Specify the URL of the server-side script (getData.php) in URL attribute of the <table> tag.
  • Use pagination attribute and set it TURE (pagination=”true”) to add pagination links to the data list.

<table id=”dg” title=”Users Management” class=”easyui-datagrid” url=”getData.php” toolbar=”#toolbar” pagination=”true” rownumbers=”true” fitColumns=”true” singleSelect=”true” style=”width:100%;height:350px;”>

    <thead>

        <tr>

            <th field=”first_name” width=”50″>First Name</th>

            <th field=”last_name” width=”50″>Last Name</th>

            <th field=”email” width=”50″>Email</th>

            <th field=”phone” width=”50″>Phone</th>

        </tr>

    </thead>

</table>

<div id=”toolbar”>

    <div id=”tb”>

        <input id=”term” placeholder=”Type keywords…”>

        <a href=”javascript:void(0);” class=”easyui-linkbutton” plain=”true” onclick=”doSearch()”>Search</a>

    </div>

    <div id=”tb2″ style=””>

        <a href=”javascript:void(0)” class=”easyui-linkbutton” iconCls=”icon-add” plain=”true” onclick=”newUser()”>New User</a>

        <a href=”javascript:void(0)” class=”easyui-linkbutton” iconCls=”icon-edit” plain=”true” onclick=”editUser()”>Edit User</a>

        <a href=”javascript:void(0)” class=”easyui-linkbutton” iconCls=”icon-remove” plain=”true” onclick=”destroyUser()”>Remove User</a>

    </div>

</div>

  1. Add HTML code for add/edit form dialog.

<div id=”dlg” class=”easyui-dialog” style=”width:450px” data-options=”closed:true,modal:true,border:’thin’,buttons:’#dlg-buttons'”>

    <form id=”fm” method=”post” novalidate style=”margin:0;padding:20px 50px”>

        <h3>User Information</h3>

        <div style=”margin-bottom:10px”>

            <input name=”first_name” class=”easyui-textbox” required=”true” label=”First Name:” style=”width:100%”>

        </div>

        <div style=”margin-bottom:10px”>

            <input name=”last_name” class=”easyui-textbox” required=”true” label=”Last Name:” style=”width:100%”>

        </div>

        <div style=”margin-bottom:10px”>

            <input name=”email” class=”easyui-textbox” required=”true” validType=”email” label=”Email:” style=”width:100%”>

        </div>

        <div style=”margin-bottom:10px”>

            <input name=”phone” class=”easyui-textbox” required=”true” label=”Phone:” style=”width:100%”>

        </div>

    </form>

</div>

<div id=”dlg-buttons”>

    <a href=”javascript:void(0);” class=”easyui-linkbutton c6″ iconCls=”icon-ok” onclick=”saveUser()” style=”width:90px;”>Save</a>

    <a href=”javascript:void(0);” class=”easyui-linkbutton” iconCls=”icon-cancel” onclick=”javascript:$(‘#dlg’).dialog(‘close’);” style=”width:90px;”>Cancel</a>

</div>

 

  1. Add the JavaScript code for server-side interaction.
  • search() – Send terms to the server-side script (getData.php) and load the filtered data.
  • newUser() – Open popup dialog with the HTML form to add data.
  • editUser() – Open popup dialog with the HTML form to edit data.
  • saveUser() – Send data to the server-side script (addData.php or editData.php) for saving in the database.
  • destroyUser() – Send request to the server-side script (deleteData.php) for remove data.

 

script  open

function doSearch(){

    $(‘#dg’).datagrid(‘load’, {

        term: $(‘#term’).val()

    });

}

var url;

function newUser(){

$(‘#dlg’).dialog(‘open’).dialog(‘center’).dialog(‘setTitle’,’New User’);

$(‘#fm’).form(‘clear’);

url = ‘addData.php’;

}

function editUser(){

var row = $(‘#dg’).datagrid(‘getSelected’);

if (row){

$(‘#dlg’).dialog(‘open’).dialog(‘center’).dialog(‘setTitle’,’Edit User’);

$(‘#fm’).form(‘load’,row);

url = ‘editData.php?id=’+row.id;

}}

function saveUser(){

$(‘#fm’).form(‘submit’,{

url: url,

onSubmit: function(){

return $(this).form(‘validate’);

},

success: function(response){

var respData = $.parseJSON(response);

if(respData.status == 0){

$.messager.show({

title: ‘Error’,

msg: respData.msg

});

}else{

$(‘#dlg’).dialog(‘close’);

$(‘#dg’).datagrid(‘reload’);

} } });

}

function destroyUser(){

var row = $(‘#dg’).datagrid(‘getSelected’);

if (row){

$.messager.confirm(‘Confirm’,’Are you sure you want to delete this user?’,function(r){

if (r){

$.post(‘deleteData.php’, {id:row.id}, function(response){

if(response.status == 1){

$(‘#dg’).datagrid(‘reload’);

}else{

$.messager.show({

title: ‘Error’,

msg: respData.msg

});

} },’json’);

} });

} }

Script End

crud in php codeigniter

Server-side Processing

Create Database Table:

To store the data a table is required in the database. The following SQL creates a users table in the MySQL database with some basic fields.

CREATE TABLE `users` (

 `id` int(11) NOT NULL AUTO_INCREMENT,

 `first_name` varchar(25) COLLATE utf8_unicode_ci NOT NULL,

 `last_name` varchar(25) COLLATE utf8_unicode_ci NOT NULL,

 `email` varchar(50) COLLATE utf8_unicode_ci NOT NULL,

 `phone` varchar(20) COLLATE utf8_unicode_ci NOT NULL,

 PRIMARY KEY (`id`)

) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

 

Database Configuration (dbConnect.php):

The dbConnect.php file is used to connect with the database. Specify the database host ($dbHost), username ($dbUsername), password ($dbPassword), and name ($dbName) as per your MySQL database credentials.

 

Php code

// Database configuration 

$dbHost     = “localhost”; 

$dbUsername = “root”; 

$dbPassword = “root”; 

$dbName     = “codexworld”;

// Create database connection

$db = new mysqli($dbHost, $dbUsername, $dbPassword, $dbName);

// Check connection

if ($db->connect_error) {

    die(“Connection failed: ” . $db->connect_error); }

 

Fetch Data (getData.php):

 

This getData.php file is used to fetch data from the database using PHP and MySQL.

  • Based on the search terms and page number, the records are returned in JSON format.

 

// Include the database config file

require_once ‘dbConnect.php’;

$page = isset($_POST[‘page’]) ? intval($_POST[‘page’]) : 1;

$rows = isset($_POST[‘rows’]) ? intval($_POST[‘rows’]) : 10;

$searchTerm = isset($_POST[‘term’]) ? $db->real_escape_string($_POST[‘term’]) : ”;

$offset = ($page-1)*$rows;

$result = array();

$whereSQL = “first_name LIKE ‘$searchTerm%’ OR last_name LIKE ‘$searchTerm%’ OR email LIKE ‘$searchTerm%’ OR phone LIKE ‘$searchTerm%'”;

$result = $db->query(“SELECT COUNT(*) FROM users WHERE $whereSQL”);

$row = $result->fetch_row();

$response[“total”] = $row[0];

$result = $db->query( “SELECT * FROM users WHERE $whereSQL ORDER BY id DESC LIMIT $offset,$rows”);

$users = array();

while($row = $result->fetch_assoc()){

    array_push($users, $row);

}

$response[“rows”] = $users;

echo json_encode($response);

 

 

Add Data (addData.php):

The addData.php file is used to insert data in the database using PHP and MySQL.

$response = array(

    ‘status’ => 0,

    ‘msg’ => ‘Some problems occurred, please try again.’

);

if(!empty($_REQUEST[‘first_name’]) && !empty($_REQUEST[‘last_name’]) && !empty( $_REQUEST[’email’]) && !empty($_REQUEST[‘phone’])){

    $first_name = $_REQUEST[‘first_name’];

    $last_name = $_REQUEST[‘last_name’];

    $email = $_REQUEST[’email’];

    $phone = $_REQUEST[‘phone’];

         // Include the database config file

    require_once ‘dbConnect.php’;

         $sql = “INSERT INTO users(first_name,last_name,email,phone) VALUES (‘$first_name’,’$last_name’,’$email’,’$phone’)”;

    $insert = $db->query($sql);

         if($insert){

        $response[‘status’] = 1;

        $response[‘msg’] = ‘User data has been added successfully!’;

    } }else{

    $response[‘msg’] = ‘Please fill all the mandatory fields.’;

}

 echo json_encode($response);

 

 

Update Data (editData.php):

The editData.php the file is used to update data based on the row ID using PHP and MySQL.

$response = array(

    ‘status’ => 0,

    ‘msg’ => ‘Some problems occurred, please try again.’

);

if(!empty($_REQUEST[‘first_name’]) && !empty($_REQUEST[‘last_name’]) && !empty( $_REQUEST[’email’]) && !empty($_REQUEST[‘phone’])){

    $first_name = $_REQUEST[‘first_name’];

    $last_name = $_REQUEST[‘last_name’];

    $email = $_REQUEST[’email’];

    $phone = $_REQUEST[‘phone’];

    

    if(!empty($_REQUEST[‘id’])){

        $id = intval($_REQUEST[‘id’]);

        

        // Include the database config file

        require_once ‘dbConnect.php’;

        

        $sql = “UPDATE users SET first_name=’$first_name’, last_name=’$last_name’, email=’$email’, phone=’$phone’ WHERE id = $id”;

        $update = $db->query($sql);

        

        if($update){

            $response[‘status’] = 1;

            $response[‘msg’] = ‘User data has been updated successfully!’;

        }

    }

}else{

    $response[‘msg’] = ‘Please fill all the mandatory fields.’;

}

 

echo json_encode($response);

 

Delete Data (deleteData.php):

The deleteData.php the file is used to delete data from the database based on the row ID.

$response = array(

    ‘status’ => 0,

    ‘msg’ => ‘Some problems occurred, please try again.’

);

if(!empty($_REQUEST[‘id’])){

    $id = intval($_REQUEST[‘id’]);

    // Include the database config file

    require_once ‘dbConnect.php’;

    $sql = “DELETE FROM users WHERE id = $id”;

    $delete = $db->query($sql);

    if($delete){

        $response[‘status’] = 1;

        $response[‘msg’] = ‘User data has been deleted successfully!’;

    } }

echo json_encode($response);

 

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