How can one troubleshoot when a query in PHP returns no results, despite the correct SQL statement?

If a query in PHP returns no results despite the correct SQL statement, one possible issue could be that there are no matching records in the database for the given query. To troubleshoot this, you can check the data in the database to ensure it aligns with the query conditions, verify the SQL statement for any errors, and confirm that the connection to the database is established properly. 

// Example PHP code snippet to troubleshoot a query returning no results

// Make sure the SQL statement is correct
$sql = "SELECT * FROM table WHERE column = 'value'";

// Execute the query
$result = mysqli_query($connection, $sql);

// Check if any rows were returned
if (mysqli_num_rows($result) > 0) {
    // Fetch and display the results
    while ($row = mysqli_fetch_assoc($result)) {
        echo $row['column_name'];
    }
} else {
    echo "No results found.";
}

Keywords

PHP SQL query troubleshooting error detection

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