How can PHP code be modified to display only the data of a specific user and not all data from a table?

To display only the data of a specific user and not all data from a table in PHP, you can modify the SQL query to include a WHERE clause that filters data based on a specific user identifier, such as a user ID or username. This way, only the data related to that specific user will be retrieved and displayed. 

<?php
// Connect to 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);
}

// User ID of the specific user
$user_id = 1;

// SQL query to select data of a specific user
$sql = "SELECT * FROM table_name WHERE user_id = $user_id";

$result = $conn->query($sql);

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

$conn->close();
?>

Keywords

PHP SQL WHERE clause user-specific data database manipulation

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