Complete Guide and Practical Tips for PHP Database Insert Operations

Core Knowledge of PHP Database Insert Operations

Basic Concepts

The INSERT statement is used to add new records to a database table by specifying column names and values.

• Column names specify the target columns for data insertion.
• Values represent the data to be inserted.

Syntax

$sql = "INSERT INTO table_name (column1, column2, ...) VALUES (value1, value2, ...)";

Parameterized Queries

Using parameterized queries can effectively prevent SQL injection attacks. Bind parameters to placeholders instead of directly concatenating user input into the query string.

$stmt = $conn->prepare("INSERT INTO table_name (column1, column2) VALUES (?, ?)");
$stmt->bind_param("ss", $value1, $value2);

Batch Insert

Use the INSERT ... SELECT statement to insert data in bulk from another table.

$sql = "INSERT INTO table1 (column1, column2) SELECT column1, column2 FROM table2";

Retrieve Inserted ID

Use the LAST_INSERT_ID() function or $conn->insert_id to get the automatically generated ID for further operations.

$id = $conn->insert_id;

Transaction Management

Transactions ensure that a group of database operations either all succeed or all fail. Common functions include begin_transaction(), commit(), and rollback().

Error Handling

Use the mysqli_error() function to capture and handle errors that occur during database operations.

if ($stmt->execute()) {
  // Execution successful
} else {
  echo "Error: " . $stmt->error;
}