What is the potential issue with comparing data from two different databases in PHP?

Comparing data from two different databases in PHP can be problematic due to differences in data types, table structures, and query syntax between the databases. To solve this issue, you can use a data transformation process to standardize the data before comparing it. This involves fetching the data from each database, converting it to a common format, and then performing the comparison.

// Fetch data from database 1
// Convert data to a common format

// Fetch data from database 2
// Convert data to the same common format

// Compare the data from both databases
if ($dataFromDB1 == $dataFromDB2) {
    echo "Data from both databases is the same";
} else {
    echo "Data from both databases is different";
}