How can the issue of empty result sets be addressed when using multiple conditions in PHP queries?

When using multiple conditions in PHP queries, the issue of empty result sets can be addressed by checking if any rows are returned before attempting to access the data. This can be done by using functions like `mysqli_num_rows()` to determine if there are any results to work with. 

// Execute the query
$result = mysqli_query($conn, "SELECT * FROM table WHERE condition1 = 'value1' AND condition2 = 'value2'");

// Check if any rows are returned
if(mysqli_num_rows($result) > 0) {
    // Fetch and process the data
    while($row = mysqli_fetch_assoc($result)) {
        // Process each row
    }
} else {
    // Handle the case of empty result set
    echo "No results found.";
}

Keywords

PHP SQL queries empty result sets multiple conditions error handling

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