how to use switch case with PHP crud

 To use switch case with PHP CRUD operations (Create, Read, Update, Delete), you can follow these steps:

1. Define a variable to hold the value of the action that needs to be performed. For example

$action = isset($_GET['action']) ? $_GET['action'] : '';

Here, we are checking if the 'action' parameter is set in the URL and assigning its value to the $action variable.

2. Use a switch statement to perform the appropriate action based on the value of the $action variable. For example:

switch($action) {

case 'create':

// Perform create operation

break;

case 'read':

// Perform read operation

break;

case 'update':

// Perform update operation

break;

case 'delete':

// Perform delete operation

break;

default:

// Invalid action

}

Here, we are using the switch statement to check the value of the $action variable and perform the appropriate CRUD operation.

3. Implement the CRUD operations inside the switch cases. For example:

switch($action) {

case 'create':

// Perform create operation

$name = $_POST['name'];

$email = $_POST['email'];

// Insert data into database using SQL query

break;

case 'read':

// Perform read operation

// Retrieve data from database using SQL query

break;

case 'update':

// Perform update operation

$id = $_POST['id'];

$name = $_POST['name'];

$email = $_POST['email'];

// Update data in database using SQL query

break;

case 'delete':

// Perform delete operation

$id = $_POST['id'];

// Delete data from database using SQL query

break;

default:

// Invalid action

}

2. Handle the create action: Inside the case 'create': block, write code to insert new data into your database. For example:

$name = $_POST['name'];

$email = $_POST['email'];

// Insert new user into database

$db->query("INSERT INTO users (name, email) VALUES ('$name', '$email')");

3. Handle the read action: Inside the case 'read': block, write code to retrieve data from your database and display it on the screen. For example:

// Retrieve all users from database

$results = $db->query("SELECT * FROM users");

// Display results in a table

echo '<table>';

echo '<tr><th>Name</th><th>Email</th></tr>';

while ($row = $results->fetch_assoc()) {

echo '<tr><td>' . $row['name'] . '</td><td>' . $row['email'] . '</td></tr>';

}

echo '</table>';

4. Handle the update action: Inside the case 'update': block, write code to update existing data in your database. For example:

$id = $_POST['id'];

$name = $_POST['name'];

$email = $_POST['email'];

// Update user in database

$db->query("UPDATE users SET name='$name', email='$email' WHERE id=$id");

5. Handle the delete action: Inside the case 'delete': block, write code to delete data from your database. For example:

$id = $_POST['id'];

// Delete user from database

$db->query("DELETE FROM users WHERE id=$id");

Here, we are implementing the CRUD operations inside the switch cases. For example, in the 'create' case, we are retrieving the values of the 'name' and 'email' fields from the POST request, and then inserting them into the database using an SQL query.

Note: This is just an example and you will need to modify the code according to your specific requirements and database schema. Also, make sure to properly validate and sanitize user input to prevent SQL injection attacks.