What potential issue can arise when using multiple database connections in PHP, as seen in the provided code snippets?

When using multiple database connections in PHP, a potential issue that can arise is the confusion or accidental misuse of the connections due to their similar names. To solve this issue, it is recommended to use unique and descriptive variable names for each connection to avoid any mix-ups. 

// Correct way of using multiple database connections with unique variable names

$connection1 = new mysqli($host1, $username1, $password1, $database1);
$connection2 = new mysqli($host2, $username2, $password2, $database2);

// Example of using the connections
$query1 = "SELECT * FROM table1";
$result1 = $connection1->query($query1);

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

// Remember to close the connections when done
$connection1->close();
$connection2->close();

Keywords

database connections PHP code snippets potential issue error types

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