What are common reasons for PHP scripts not properly writing data to a database?

Common reasons for PHP scripts not properly writing data to a database include incorrect database connection settings, SQL syntax errors, and insufficient user permissions. To solve this issue, ensure that the database connection settings are correct, double-check the SQL queries for errors, and make sure the user has the necessary permissions to write to the database. 

// Correcting database connection settings
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "my_database";

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

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

// Correcting SQL query syntax
$sql = "INSERT INTO my_table (column1, column2) VALUES ('value1', 'value2')";

if ($conn->query($sql) === TRUE) {
    echo "Record inserted successfully";
} else {
    echo "Error: " . $sql . "<br>" . $conn->error;
}

// Closing the database connection
$conn->close();

Keywords

MySQL SQL injection PDO error handling data validation

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