How can PHP developers ensure that only specific data is displayed in a table format while querying a database?

To ensure that only specific data is displayed in a table format while querying a database, PHP developers can use a SELECT statement with specific columns specified in the query. By selecting only the desired columns, developers can control which data is retrieved from the database and displayed in the table. 

<?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);
}

// Query database and display specific data in a table format
$sql = "SELECT column1, column2, column3 FROM table";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    echo "<table>";
    echo "<tr><th>Column 1</th><th>Column 2</th><th>Column 3</th></tr>";
    while($row = $result->fetch_assoc()) {
        echo "<tr><td>".$row["column1"]."</td><td>".$row["column2"]."</td><td>".$row["column3"]."</td></tr>";
    }
    echo "</table>";
} else {
    echo "0 results";
}

$conn->close();
?>

Keywords

PHP database query data filtering table formatting security restrictions

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