How can PHP developers effectively troubleshoot and debug issues related to MySQL database interactions within their code?

To effectively troubleshoot and debug MySQL database interaction issues in PHP code, developers can use tools like error reporting, logging, and debugging functions provided by PHP and MySQL. They can also check for syntax errors, connection errors, and query errors to identify the root cause of the issue. Additionally, developers can use tools like phpMyAdmin or MySQL Workbench to interact directly with the database and test queries. 

<?php
// Enable error reporting for PHP and MySQL
error_reporting(E_ALL);
ini_set('display_errors', 1);

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

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

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

// Perform MySQL query
$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 MySQL debugging error handling SQL queries

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