Search results for: "query string"

How can one effectively troubleshoot issues with mysqli_query in PHP?

Issue: When using mysqli_query in PHP, it is important to ensure that the connection to the database is properly established before executing the quer...

What are some best practices for debugging PHP code that involves database queries to ensure accurate results?

When debugging PHP code that involves database queries, it is crucial to ensure accurate results by checking for errors in the query syntax, connectio...

How can error messages like "supplied argument is not a valid MySQL result resource" be effectively troubleshooted in PHP?

When encountering the error message "supplied argument is not a valid MySQL result resource" in PHP, it typically means that there was an issue with t...

What are common reasons for the error message "Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource" in PHP code?

The error message "Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource" typically occurs when the result of a query is n...

What are the common errors that can cause the "supplied argument is not a valid MySQL result resource" warning when fetching data from a database?

The "supplied argument is not a valid MySQL result resource" warning typically occurs when the query executed against the database does not return a v...