How To Retrieve A Single Data/Record From Database Using Php Mysql

Retrieving data from a database is an essential task when working with Php and Mysql. In this tutorial, we will explore how to retrieve a single data or record from a database using Php Mysql.

Steps:

1. Connect to the database:

Before we can retrieve data from the database, we need to establish a connection to the database using Php.

We can use the mysqli_connect() function to establish a connection to the database. Here is an example code:

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$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";
 
// Create connection
$conn = mysqli_connect($servername, $username, $password, $dbname);
 
// Check connection
if (!$conn) {
    die("Connection failed: " . mysqli_connect_error());
}

2. Prepare and execute the query:

Once we have established a connection to the database, we can prepare and execute a query to retrieve the desired data.

We can use the mysqli_query() function to execute a query. Here is an example code to retrieve a single record:

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$sql = "SELECT * FROM users WHERE id=1";
$result = mysqli_query($conn, $sql);
 
if (mysqli_num_rows($result) > 0) {
    // output data of each row
    while($row = mysqli_fetch_assoc($result)) {
        echo "id: " . $row["id"]. " - Name: " . $row["name"]. " - Email: " . $row["email"];
    }
} else {
    echo "0 results";
}

In this example, we are selecting all columns (*) from the user’s table where the id is equal to 1. The mysqli_fetch_assoc() function is used to fetch the result set one row at a time and return it as an associative array.

3. Close the database connection:

After we have retrieved the desired data, it is important to close the database connection using the mysqli_close() function.

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mysqli_close($conn);

Conclusion:

In this tutorial, we have learned how to retrieve a single data or record from a database using Php Mysql. By following these steps, you can retrieve data from a database and use it in your Php applications.

If you want to learn more about Php Mysql, you can visit the official Php and MySQL documentation.