What is the purpose of using MySQL queries in PHP for data retrieval?

When working with databases in PHP, MySQL queries are used to retrieve data from a database. This allows developers to fetch specific information from tables based on certain criteria, such as user input or predefined conditions. By using MySQL queries in PHP, developers can dynamically retrieve and display data on web pages, making applications more interactive and personalized. 

// Connect to MySQL database
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";

$conn = new mysqli($servername, $username, $password, $dbname);

// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

// Perform MySQL query to retrieve data
$sql = "SELECT * FROM table_name WHERE condition = 'value'";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    // Output data of each row
    while($row = $result->fetch_assoc()) {
        echo "Column1: " . $row["column1"]. " - Column2: " . $row["column2"]. "<br>";
    }
} else {
    echo "0 results";
}

$conn->close();

Keywords

MySQL queries PHP data retrieval purpose

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