What potential issues can arise when updating to MySQL V5 in relation to email sending in PHP?

When updating to MySQL V5, the issue that can arise in relation to email sending in PHP is that the older MySQL functions like mysql_connect() and mysql_query() are deprecated and may not work properly. To solve this, you should switch to using MySQLi or PDO for database connections and queries in PHP. 

// Connect to MySQL using MySQLi
$mysqli = new mysqli("localhost", "username", "password", "database");

// Check connection
if ($mysqli->connect_error) {
    die("Connection failed: " . $mysqli->connect_error);
}

// Query to select data from a table
$result = $mysqli->query("SELECT * FROM table_name");

// Fetch data from the result set
while ($row = $result->fetch_assoc()) {
    // Send email code here
}

// Close connection
$mysqli->close();

Keywords

MySQL V5 email sending PHP SMTP database connection

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