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PHP MYSQL CRUD Application

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This php crud application will teach you how to do basic database functions that are CREATE RETIEVE UPDATE and DELETE. using Mysql Database. The INSERT, SELECT, UPDATE and DELETE statements can be used in any database system, because this is support by all relational database systems.

The tutorial you learn php mysql crud operation step by step.  Crud operations are must when you developing  a php mini projects. learn how learn how to INSERT, SELECT, UPDATE and DELETE in database by writing code to manage the students table in the database named dbcrud. students table consist of following columns name,course,fee.

we will do the php best practice for understand php programming clearly and easily.

we have to create the following pages.

  1. index.php
  2. add.php
  3. edit.php
  4. delete.php

Establish the database Connection

<?php 
$connection = mysqli_connect("localhost","root",""); 
$db = mysqli_select_db($connection,"dbcrud");
?>

$connection = mysqli_connect(“localhost”,”root”,””);

this line explains how to connect with mysql and php

$db = mysqli_select_db($connection,”dbcrud”);

this line explains to select database

index.php

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Student Crud Application</title>
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-GLhlTQ8iRABdZLl6O3oVMWSktQOp6b7In1Zl3/Jr59b6EGGoI1aFkw7cmDA6j6gD" crossorigin="anonymous">
</head>
<body>
        <div class="container">
            <div class="row">
                 <div class="col-md-9">
                    <div class="card">
                    <div class="card-header">
                        <h1> Student Crud Application </h1>
                    </div>
                    <div class="card-body">
                   
                    <button class="btn btn-success"> <a href="add.php" class="text-light"> Add New </a> </button>
                        
                        <br/>
                        <br/>

                    <table class="table">
                        <thead>
                            <tr>
                            <th scope="col">#</th>
                            <th scope="col">Name</th>
                            <th scope="col">Address</th>
                            <th scope="col">Mobile</th>
                            <th scope="col">Option</th>
                            </tr>
                        </thead>
                        <tbody>
                                <?php
                                $connection = mysqli_connect("localhost","root","");
                                $db = mysqli_select_db($connection,"dbcrud");

                                $sql = "select * from student";
                                $run = mysqli_query($connection, $sql);
                                $id= 1;

                                while($row = mysqli_fetch_array($run))
                                {
                                    $uid = $row['id'];
                                    $name = $row['name'];
                                    $address = $row['address'];
                                    $mobile = $row['mobile'];
                                ?>

                                   <tr>
                                        <td><?php echo $id ?></td>
                                        <td><?php echo $name ?></td>
                                        <td><?php echo $address ?></td>
                                        <td><?php echo $mobile ?></td>

                                        <td>
                                        <button class="btn btn-success"> <a href='edit.php?edit=<?php echo $uid ?>' class="text-light"> Edit </a> </button> &nbsp;
                                       <button class="btn btn-danger"><a href='delete.php?del=<?php echo $uid ?>' class="text-light"> Delete </a> </button>
                                        </td>
                                   </tr>
                                    <?php $id++; } ?>
                        </tbody>
                        </table>
                    </div>
                    </div>
                </div>
            </div>
        </div>
</body>
</html>

Add the records into the database

add.php

<?php
   $connection = mysqli_connect("localhost","root","");
    $db = mysqli_select_db($connection,"dbcrud");

    if(isset($_POST['submit']))
        {
          $name = $_POST['name'];
          $address = $_POST['address'];
         $mobile = $_POST['mobile'];

           $sql = "insert into student(name,address,mobile)values(' $name',' $address',' $mobile')";

           if(mysqli_query($connection,$sql))
           {
                  echo '<script> location.replace("index.php")</script>';  
           }
           else
           {
           echo "Some thing Error" . $connection->error;
           }
        }
?>

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Student Crud Application</title>
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-GLhlTQ8iRABdZLl6O3oVMWSktQOp6b7In1Zl3/Jr59b6EGGoI1aFkw7cmDA6j6gD" crossorigin="anonymous">
</head>
<body>

        <div class="container">
            <div class="row">
                 <div class="col-md-9">
                    <div class="card">
                    <div class="card-header">
                        <h1> Student Crud Application </h1>
                    </div>
                    <div class="card-body">

                    <form action="add.php" method="post">
                        <div class="form-group">
                            <label>Name</label>
                            <input type="text" name="name" class="form-control"  placeholder="Enter Name"> 
                        </div>

                        <div class="form-group">
                            <label>Address</label>
                            <input type="text" name="address" class="form-control"  placeholder="Enter Address"> 
                        </div>

                        <div class="form-group">
                            <label>Mobile</label>
                            <input type="text" name ="mobile" class="form-control"  placeholder="Enter Mobile"> 
                        </div>
                        <br/>
                        <input type="submit" class="btn btn-primary" name="submit" value="Register">
                        </form>
                   
                    </div>
                    </div>

                </div>
            
            </div>
        </div>

</body>
</html>

edit.php

<?php

$connection = mysqli_connect("localhost","root","");

$db = mysqli_select_db($connection,"dbcrud");
$edit = $_GET['edit'];

$sql = "select * from student where id = '$edit'";

$run = mysqli_query($connection,$sql);


while($row=mysqli_fetch_array($run))
{
    $uid = $row['id'];
    $name = $row['name'];
    $address = $row['address'];
    $mobile = $row['mobile'];

}

?>

<?php
   $connection = mysqli_connect("localhost","root","");

    $db = mysqli_select_db($connection,"dbcrud");


    if(isset($_POST['submit']))
        {
          $edit = $_GET['edit'];  
          $name = $_POST['name'];
          $address = $_POST['address'];
          $mobile = $_POST['mobile'];

           $sql = "update student set name= '$name',address= '$address',mobile='$mobile' where id =  '$edit'";

           if(mysqli_query($connection,$sql))
           {

            echo '<script> location.replace("index.php")</script>';  
           }
           else
           {
           echo "Some thing Error" . $connection->error;

           }

        }

?>

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Student Crud Application</title>
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-GLhlTQ8iRABdZLl6O3oVMWSktQOp6b7In1Zl3/Jr59b6EGGoI1aFkw7cmDA6j6gD" crossorigin="anonymous">
</head>
<body>

        <div class="container">
            <div class="row">
                 <div class="col-md-9">
                    <div class="card">
                    <div class="card-header">
                        <h1> Student Crud Application </h1>
                    </div>
                    <div class="card-body">

                    <form action="add.php" method="post">
                        <div class="form-group">
                            <label>Name</label>
                            <input type="text" name="name" class="form-control"  placeholder="Enter Name" value="<?php echo $name; ?>"> 
                        </div>

                        <div class="form-group">
                            <label>Address</label>
                            <input type="text" name="address" class="form-control"  placeholder="Enter Address" value="<?php echo $address ?>"> 
                        </div>

                        <div class="form-group">
                            <label>Mobile</label>
                            <input type="text" name ="mobile" class="form-control"  placeholder="Enter Mobile" value="<?php echo $mobile ?>"> 
                        </div>
                        <br/>
                        <input type="submit" class="btn btn-primary" name="submit" value="Edit">
                        </form>
                    </div>
                    </div>

                </div>
            
            </div>
        </div>

</body>
</html>

delete.php

<?php

$connection = mysqli_connect("localhost","root","");

$db = mysqli_select_db($connection,"dbcrud");
$delete = $_GET['del'];


$sql = "delete from student where id = '$delete'";


if(mysqli_query($connection,$sql))
           {

            echo '<script> location.replace("index.php")</script>';  
           }
           else
           {
           echo "Some thing Error" . $connection->error;

           }

?>

i have attached the video link below. which will do this tutorials step by step.

 

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