What are some potential pitfalls of using multiple databases in PHP for website development?

One potential pitfall of using multiple databases in PHP for website development is the complexity of managing connections and queries across different databases. To solve this issue, you can create separate database connection objects for each database and use them accordingly in your code. 

// Create separate database connections for each database
$connection1 = new mysqli($host1, $username1, $password1, $database1);
$connection2 = new mysqli($host2, $username2, $password2, $database2);

// Use the respective connection for queries
$query1 = "SELECT * FROM table1";
$result1 = $connection1->query($query1);

$query2 = "SELECT * FROM table2";
$result2 = $connection2->query($query2);

Keywords

MySQL database connection SQL injection data consistency performance impact

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