{"id":3920,"date":"2023-11-04T23:13:56","date_gmt":"2023-11-04T23:13:56","guid":{"rendered":"http:\/\/localhost:10003\/how-to-implement-crud-operations-with-mysql-and-php\/"},"modified":"2023-11-05T05:48:27","modified_gmt":"2023-11-05T05:48:27","slug":"how-to-implement-crud-operations-with-mysql-and-php","status":"publish","type":"post","link":"http:\/\/localhost:10003\/how-to-implement-crud-operations-with-mysql-and-php\/","title":{"rendered":"How to Implement CRUD Operations with MySQL and PHP"},"content":{"rendered":"
In this tutorial, we will learn how to implement CRUD operations (Create, Read, Update, Delete) using MySQL and PHP. CRUD operations are the basic functions that are commonly used in database management systems.<\/p>\n
To follow along with this tutorial, you will need:<\/p>\n
Let’s get started!<\/p>\n
The first step is to set up a MySQL database. Open your MySQL client and create a new database:<\/p>\n
CREATE DATABASE mydatabase;\n<\/code><\/pre>\nNext, create a table to store our data:<\/p>\n
CREATE TABLE users (\n id INT PRIMARY KEY AUTO_INCREMENT,\n name VARCHAR(50) NOT NULL,\n email VARCHAR(50) NOT NULL\n);\n<\/code><\/pre>\nThis table will have three columns: id<\/code>, name<\/code>, and email<\/code>. The id<\/code> column will serve as the primary key and will automatically increment for each new record.<\/p>\nConnecting to the Database<\/h2>\n
To connect to the MySQL database using PHP, we need to establish a connection using the mysqli<\/code> extension. Create a new file called config.php<\/code> and add the following code:<\/p>\n<?php\n\n$host = 'localhost';\n$dbUsername = 'username'; \/\/ Replace with your database username\n$dbPassword = 'password'; \/\/ Replace with your database password\n$dbName = 'mydatabase';\n\n$conn = new mysqli($host, $dbUsername, $dbPassword, $dbName);\n\nif ($conn->connect_error) {\n die(\"Connection failed: \" . $conn->connect_error);\n}\n<\/code><\/pre>\nMake sure to replace 'username'<\/code> and 'password'<\/code> with your actual database credentials.<\/p>\nTo test the connection, create a new file called index.php<\/code> and include the config.php<\/code> file:<\/p>\n<?php\n\nrequire 'config.php';\n\necho \"Connection established!\";\n<\/code><\/pre>\nWhen you visit index.php<\/code> in your browser, you should see the message “Connection established!” if the connection was successful.<\/p>\nCreating Records<\/h2>\n
To create new records in the database, we need to create an HTML form to collect the input from the user. Create a new file called create.php<\/code> and add the following code:<\/p>\n<?php\n\nrequire 'config.php';\n\nif ($_SERVER['REQUEST_METHOD'] === 'POST') {\n $name = $_POST['name'];\n $email = $_POST['email'];\n\n $sql = \"INSERT INTO users (name, email) VALUES ('$name', '$email')\";\n\n if ($conn->query($sql) === true) {\n echo \"Record created successfully!\";\n } else {\n echo \"Error: \" . $sql . \"<br>\" . $conn->error;\n }\n}\n\n$conn->close();\n?>\n\n<!DOCTYPE html>\n<html>\n<head>\n <title>Create User<\/title>\n<\/head>\n<body>\n <h1>Create User<\/h1>\n\n <form method=\"post\" action=\"create.php\">\n <label for=\"name\">Name:<\/label>\n <input type=\"text\" name=\"name\" required>\n\n <label for=\"email\">Email:<\/label>\n <input type=\"email\" name=\"email\" required>\n\n <button type=\"submit\">Create<\/button>\n <\/form>\n<\/body>\n<\/html>\n<\/code><\/pre>\nThis code will display an HTML form to collect the user’s name and email. When the form is submitted, it will insert the values into the database using an SQL INSERT<\/code> statement.<\/p>\nTo test this functionality, open create.php<\/code> in your browser and submit the form. You should see the message “Record created successfully!” if the insertion was successful.<\/p>\nRetrieving Records<\/h2>\n
To retrieve records from the database, we can use an SQL SELECT<\/code> statement. Create a new file called read.php<\/code> and add the following code:<\/p>\n<?php\n\nrequire 'config.php';\n\n$sql = \"SELECT * FROM users\";\n$result = $conn->query($sql);\n\n$userData = array();\n\nif ($result->num_rows > 0) {\n while ($row = $result->fetch_assoc()) {\n $userData[] = $row;\n }\n}\n\n$conn->close();\n?>\n\n<!DOCTYPE html>\n<html>\n<head>\n <title>View Users<\/title>\n<\/head>\n<body>\n <h1>View Users<\/h1>\n\n <?php if (!empty($userData)): ?>\n <table>\n <thead>\n <tr>\n <th>ID<\/th>\n <th>Name<\/th>\n <th>Email<\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <?php foreach ($userData as $user): ?>\n <tr>\n <td><?php echo $user['id']; ?><\/td>\n <td><?php echo $user['name']; ?><\/td>\n <td><?php echo $user['email']; ?><\/td>\n <\/tr>\n <?php endforeach; ?>\n <\/tbody>\n <\/table>\n <?php else: ?>\n <p>No users found.<\/p>\n <?php endif; ?>\n<\/body>\n<\/html>\n<\/code><\/pre>\nThis code will retrieve all records from the users<\/code> table and display them in an HTML table. If no records are found, it will display the message “No users found.”<\/p>\nTo test this functionality, open read.php<\/code> in your browser. If there are any records in the database, they will be displayed in a table.<\/p>\nUpdating Records<\/h2>\n
To update existing records in the database, we need to create a similar form as the one used for creating records, but with the pre-filled data of the selected record. Create a new file called update.php<\/code> and add the following code:<\/p>\n<?php\n\nrequire 'config.php';\n\nif ($_SERVER['REQUEST_METHOD'] === 'POST') {\n $id = $_POST['id'];\n $name = $_POST['name'];\n $email = $_POST['email'];\n\n $sql = \"UPDATE users SET name='$name', email='$email' WHERE id='$id'\";\n\n if ($conn->query($sql) === true) {\n echo \"Record updated successfully!\";\n } else {\n echo \"Error: \" . $sql . \"<br>\" . $conn->error;\n }\n} elseif (isset($_GET['id'])) {\n $id = $_GET['id'];\n\n $sql = \"SELECT * FROM users WHERE id='$id'\";\n $result = $conn->query($sql);\n\n if ($result->num_rows === 1) {\n $row = $result->fetch_assoc();\n $name = $row['name'];\n $email = $row['email'];\n } else {\n echo \"No user found with ID: \" . $id;\n exit();\n }\n}\n\n$conn->close();\n?>\n\n<!DOCTYPE html>\n<html>\n<head>\n <title>Update User<\/title>\n<\/head>\n<body>\n <h1>Update User<\/h1>\n\n <?php if (isset($_GET['id'])): ?>\n <form method=\"post\" action=\"update.php\">\n <input type=\"hidden\" name=\"id\" value=\"<?php echo $_GET['id']; ?>\">\n\n <label for=\"name\">Name:<\/label>\n <input type=\"text\" name=\"name\" value=\"<?php echo $name; ?>\" required>\n\n <label for=\"email\">Email:<\/label>\n <input type=\"email\" name=\"email\" value=\"<?php echo $email; ?>\" required>\n\n <button type=\"submit\">Update<\/button>\n <\/form>\n <?php else: ?>\n <p>No user ID specified.<\/p>\n <?php endif; ?>\n<\/body>\n<\/html>\n<\/code><\/pre>\nThis code will retrieve the data of the selected user by its ID and display an HTML form to update the values. When the form is submitted, it will update the corresponding record in the database using an SQL UPDATE<\/code> statement.<\/p>\nTo test this functionality, open update.php?id=1<\/code> in your browser, replacing 1<\/code> with the ID of an existing user. The form will be pre-filled with the user’s data, and any changes made will be saved in the database.<\/p>\nDeleting Records<\/h2>\n
To delete records from the database, we can use an SQL DELETE<\/code> statement. Create a new file called delete.php<\/code> and add the following code:<\/p>\n<?php\n\nrequire 'config.php';\n\nif (isset($_GET['id'])) {\n $id = $_GET['id'];\n\n $sql = \"DELETE FROM users WHERE id='$id'\";\n\n if ($conn->query($sql) === true) {\n echo \"Record deleted successfully!\";\n } else {\n echo \"Error: \" . $sql . \"<br>\" . $conn->error;\n }\n} else {\n echo \"No user ID specified.\";\n exit();\n}\n\n$conn->close();\n?>\n<\/code><\/pre>\nThis code will delete the record matching the specified ID from the users<\/code> table.<\/p>\nTo test this functionality, open delete.php?id=1<\/code> in your browser, replacing 1<\/code> with the ID of an existing user. The user’s record will be deleted from the database, and you will see the message “Record deleted successfully!”.<\/p>\nConclusion<\/h2>\n
Congratulations! You have successfully implemented CRUD operations using MySQL and PHP. You learned how to create, read, update, and delete records in a MySQL database, using PHP to interact with the database.<\/p>\n
Remember to always validate and sanitize user input to prevent security vulnerabilities. Additionally, consider implementing user authentication and authorization to restrict access to the CRUD operations if required.<\/p>\n
Feel free to explore more advanced features, such as pagination, search functionality, and input validation, to enhance your CRUD operations.<\/p>\n
Keep practicing and building exciting projects with PHP and MySQL!<\/p>\n","protected":false},"excerpt":{"rendered":"
In this tutorial, we will learn how to implement CRUD operations (Create, Read, Update, Delete) using MySQL and PHP. CRUD operations are the basic functions that are commonly used in database management systems. To follow along with this tutorial, you will need: A local development environment with PHP and MySQL Continue Reading<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[344,342,347,343,348,341,340,345,346],"yoast_head":"\nHow to Implement CRUD Operations with MySQL and PHP - Pantherax Blogs<\/title>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\t\n\t\n\t\n