How can MySQL queries be properly integrated into a PHP script to insert email addresses from a file into a database table?

To properly integrate MySQL queries into a PHP script to insert email addresses from a file into a database table, you can use the fopen function to open the file, read each line to extract the email addresses, and then execute an INSERT query for each email address to insert them into the database table. 

<?php
$filename = 'emails.txt';
$handle = fopen($filename, "r");

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

if ($handle) {
    while (($line = fgets($handle)) !== false) {
        $email = trim($line);
        $query = "INSERT INTO emails (email) VALUES ('$email')";
        $mysqli->query($query);
    }

    fclose($handle);
} else {
    echo "Error opening the file.";
}

$mysqli->close();
?>

Keywords

MySQL queries PHP script insert email addresses database table

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