How can the use of echo statements help in debugging PHP scripts that involve database operations?

Using echo statements in PHP scripts that involve database operations can help in debugging by allowing you to see the values of variables, SQL queries, and any errors that may occur during the execution of the script. By echoing out these values at different points in the script, you can track the flow of data and identify any issues that may be causing unexpected behavior. 

// Example of using echo statements for debugging database operations
$query = "SELECT * FROM users WHERE id = 1";
echo "Query: " . $query . "<br>";

$result = mysqli_query($connection, $query);
if (!$result) {
    echo "Error: " . mysqli_error($connection) . "<br>";
} else {
    while ($row = mysqli_fetch_assoc($result)) {
        echo "User ID: " . $row['id'] . "<br>";
        echo "Username: " . $row['username'] . "<br>";
        // Additional debugging output can be added as needed
    }
}

Keywords

echo statements debugging PHP scripts database operations error messages

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