Search results for: "mysql_num_rows()"

What common mistakes can lead to the error message "mysql_num_rows() expects parameter 1 boolean given" in PHP?

The error message "mysql_num_rows() expects parameter 1 boolean given" occurs when the function expects a result set as the parameter, but receives a...

How can the issue of undefined function errors be prevented when working with PHP functions like mysql_num_rows?

When working with PHP functions like mysql_num_rows, undefined function errors can be prevented by ensuring that the correct extension is enabled in t...

What are the potential pitfalls of using mysql_num_rows in PHP scripts?

Using mysql_num_rows in PHP scripts can be problematic because it is deprecated as of PHP 5.5.0 and removed in PHP 7.0.0. It is recommended to use mys...

What is the purpose of using mysql_num_rows() in PHP?

The purpose of using mysql_num_rows() in PHP is to retrieve the number of rows returned by a SELECT query in MySQL. This function is useful when you n...

How can the use of mysql_num_rows() versus mysql_affected_rows() impact error handling in PHP when dealing with MySQL queries?

Using mysql_num_rows() returns the number of rows in a result set, while mysql_affected_rows() returns the number of rows affected by the last INSERT,...