How can PHP developers effectively troubleshoot database query issues in their projects?

To effectively troubleshoot database query issues in PHP projects, developers can use error handling techniques such as try-catch blocks to catch and display any errors that may occur during query execution. Additionally, developers can use functions like mysqli_error() or PDO::errorInfo() to retrieve detailed error messages from the database server. 

try {
    // Perform database query here
    $result = mysqli_query($conn, "SELECT * FROM table");
    
    // Check for errors
    if (!$result) {
        throw new Exception(mysqli_error($conn));
    }
    
    // Process query results
    while ($row = mysqli_fetch_assoc($result)) {
        // Do something with the data
    }
} catch (Exception $e) {
    echo "Error executing query: " . $e->getMessage();
}

Keywords

MySQL SQL injection PDO error handling debugging

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