What are the potential pitfalls of comparing a result from mysql_num_rows to a string in PHP?

Comparing a result from `mysql_num_rows` to a string in PHP can lead to unexpected results because `mysql_num_rows` returns an integer, not a string. To fix this issue, you should convert the result of `mysql_num_rows` to a string before comparing it to another string. This can be done using type casting or by using the `strval` function in PHP.

// Get the number of rows from a MySQL query result
$num_rows = mysql_num_rows($result);

// Convert the integer to a string before comparing
if (strval($num_rows) === "5") {
    echo "There are 5 rows in the result.";
} else {
    echo "The number of rows is not 5.";
}