![]() The user input is automatically quoted, so there is no risk of a SQL injection attack. If you use PDO::prepare and PDOStatement::execute to execute a query multiple times using bound parameters, prepared statement execution optimizes execution of the repeated query. Fetching data from db using prepared statementsīelow code fetches data based on a key value supplied by a user input. insert another row with different valuesĢ. $stmt = $dbh->prepare("INSERT INTO User (name, email) VALUES (:name, :email)") Repeated inserts in db using prepared statements.īelow code example prepared the query statment once in db server and execute again and again. $stmt = $pdo->prepare("SELECT * FROM USER WHERE id=?") īenefits of Prepared statements :- 1. The problem does not occur if NO mysql-dump-processes are running. According to php.net this is due to an emulation used in PDO why it seems to be a problem in mysql itself. ![]() $stmt = $pdo->prepare("SELECT * FROM USER WHERE id=2") Prepared-Statements in PDO-PHP work and 'normal' queries as well. ![]() Sometimes developer writing sql queries using pdo prepare function thinks they are using pdo prepared statement.Its not right always, understant prepared statement by below example. These placeholders will be replaced by the actual values at the time of execution of the statement. Prepared Statement (also known as parameterized statement) is just a SQL query template which contains placeholder instead of the actual values.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |