What potential pitfalls are present in the code provided for inserting data from .txt files into a database in PHP?

One potential pitfall in the code provided is that it does not handle errors or exceptions that may occur during the file reading or database insertion process. To solve this, you should implement error handling to gracefully manage any issues that arise, such as file not found errors or database connection failures. 

<?php

$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";

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

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

$filename = "data.txt";
$file = fopen($filename, "r");

if ($file) {
    while (($data = fgetcsv($file, 1000, ",")) !== FALSE) {
        $sql = "INSERT INTO table_name (column1, column2, column3) VALUES ('$data[0]', '$data[1]', '$data[2]')";

        if ($conn->query($sql) !== TRUE) {
            echo "Error: " . $sql . "<br>" . $conn->error;
        }
    }
    fclose($file);
} else {
    echo "Error opening file.";
}

$conn->close();

?>

Keywords

SQL injection file handling fopen mysqli_real_escape_string error handling

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