How can PHP developers effectively differentiate between different types of MySQL errors when handling them in their code?

When handling MySQL errors in PHP, developers can effectively differentiate between different types of errors by utilizing the error code provided by MySQL. By checking the error code, developers can determine the specific type of error that occurred, such as a syntax error, connection issue, or duplicate entry. This allows for more targeted error handling and appropriate actions to be taken based on the specific error encountered. 

// Connect to MySQL database
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";

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

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

// Execute MySQL query
$sql = "SELECT * FROM non_existent_table";
$result = $conn->query($sql);

// Check for MySQL errors
if ($conn->errno) {
    if ($conn->errno == 1146) {
        echo "Table does not exist error";
    } else {
        echo "MySQL error: " . $conn->error;
    }
}

$conn->close();

Keywords

PHP MySQL errors error handling mysqli_error PDOException

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