How can simplifying and isolating a PHP code snippet help in troubleshooting and resolving issues related to database queries and output?

When troubleshooting database query issues in PHP, simplifying and isolating the code snippet can help pinpoint the problem more effectively. By removing unnecessary code and focusing on the specific query or output function, it becomes easier to identify any errors or issues that may be causing the problem. 

<?php
// Simplified and isolated PHP code snippet for troubleshooting database query issues
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";

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

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

$sql = "SELECT * FROM table_name";
$result = $conn->query($sql);

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

$conn->close();
?>

Keywords

PHP code snippet troubleshooting database queries output

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