Are there any potential pitfalls or difficulties in transitioning from mysql to mysqli or PDO in PHP?

When transitioning from mysql to mysqli or PDO in PHP, one potential pitfall is the need to update all existing database queries to use the new syntax and functions provided by mysqli or PDO. This can be time-consuming and may require a thorough understanding of the differences between the two database extensions. Additionally, there may be compatibility issues with existing code that relies on mysql-specific features. 

// Example of updating a mysql query to mysqli
// Original mysql query
$result = mysql_query("SELECT * FROM users");

// Updated mysqli query
$conn = new mysqli($servername, $username, $password, $dbname);
$result = $conn->query("SELECT * FROM users");

Keywords

mysql mysqli PDO transition difficulties

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