How can a PHP beginner effectively transition from using mysql functions to mysqli or PDO?

When transitioning from using mysql functions to mysqli or PDO in PHP, beginners can effectively do so by first understanding the differences between the two. They can then gradually update their code by replacing mysql functions with their mysqli or PDO equivalents. This includes updating connection code, query execution, and result fetching methods. 

// Old mysql connection
$conn = mysql_connect($servername, $username, $password);

// New mysqli connection
$conn = new mysqli($servername, $username, $password, $dbname);

// Old mysql query execution
$result = mysql_query($sql);

// New mysqli query execution
$result = $conn->query($sql);

// Old mysql result fetching
while ($row = mysql_fetch_assoc($result)) {
    // Process data
}

// New mysqli result fetching
while ($row = $result->fetch_assoc()) {
    // Process data
}

Keywords

PHP mysql functions mysqli PDO transition

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