$sql = "INSERT INTO persons (first_name, last_name, email) VALUES (?, ?, ?)" Procedural Object Oriented PDO Download connect_error) The following example will show you how prepared statements actually work: That's why the prepared statements are less error-prone, and thus considered as one of the most critical element in database security. The server uses these values directly at the point of execution, after the statement template is parsed. The parameter values are sent to the database server separately from the query using a different protocol and thus cannot interfere with it. Prepared statements also provide strong protection against SQL injection, because parameter values are not embedded directly inside the SQL query string. It also minimize bandwidth usage, since upon every execution only the placeholder values need to be transmitted to the database server instead of the complete SQL statement. Advantages of Using Prepared StatementsĪ prepared statement can execute the same statement repeatedly with high efficiency, because the statement is parsed only once again, while it can be executed multiple times. The following section describes some of the major benefits of using it.
PHP MYSQL INSERT INTO SERIES
Prepared statements is very useful, particularly in situations when you execute a particular statement multiple times with different values, for example, a series of INSERT statements.
The server creates a statement from the statement template and these values to execute it. Execute - During execute the parameter values are sent to the server.The server parses the statement template, performs a syntax check and query optimization, and stores it for later use. Prepare - At the prepare stage a SQL statement template is created and sent to the database server.The prepared statement execution consists of two stages: prepare and execute. VALUES (:first_name, :last_name, :email)
INSERT INTO persons (first_name, last_name, email)
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