#PHP IF ELSE STATEMENT WITH POST DATA UPDATE#
I am struggling with a function to update a record, and i kindly ask for your help on using placeholders to secure the prepared statement of said function.Echo( "There was an error with your form: \n ") Hello, thank you so much for this website. So it possible could be the reason why insert queries don't work. In case transactions are used, including db.php for the every query will actually roll back the previously executed query. It is not explained on this site because it's a database stuff while the site is PHP related. A transaction is not a synonym for executing an SQL query as you seemingly think.
#PHP IF ELSE STATEMENT WITH POST DATA CODE#
It's hard to tell actually.īy the look of it, it seems that somewhere in your code a transaction is started but never commited. BY NO MEANS db.php should be included for the every query. While config.php just gets included in db.php and none of our concern.Įither way, the point is, the connection should be made only once. And should be used the way was explained above: db.php should be included strictly ONCE on every page. It is made into a separate file so it will be the only file one has to edit moving the code to another server. $stmt = $pdo -> prepare ( "INSERT INTO users (name, surname, age) VALUES (?,?,?)" ) Ĭonfig.php is just integral part of db.php. So in the end our code would be like $data = [ In some circumstances it will greatly speed up the inserts, and it makes sense overall, to make sure that either all data has been added or none. it's a good idea to wrap our queries in a transaction.make sure that the emulation mode is turned off, as there will be no speed benefit otherwise, however small it is.So it makes sense to use this feature when we need to insert multiple rows into the same table. INSERTing multiple rowsĪs it's explained in the main article, a once prepared statement could be executed multiple times, slightly reducing the overhead on the query parsing.
It's also a good idea to keep all the letters lowercase. No umlauts or dashes ar any other characters are allowed. Important! The only characters allowed in the placeholder names are Latin letters, numbers and underscores. $pdo -> prepare ( $sql )-> execute ( $data )
Or you can chain execute() to prepare(): $sql = "INSERT INTO users (name, surname, sex) VALUES (:name, :surname, :sex)" $sql = "INSERT INTO users (name, surname, sex) VALUES (:name, :surname, :sex)" In case you have a predefined array with values, or prefer named placeholders in general, the code would be $data = [ Please see the article about error reporting for the details. catch operator should be used, unless you have a specific scenario to handle the error, such as a transaction rollback shown below. Such a condition will make no sense, as in case of error, a PDOException will be thrown and the script execution will be terminated, which means such a condition will never reach the else part. Important! You don't have to check the result of execute() (as it is often shown in low-quality tutorials). Or you can chain execute() to prepare(): $sql = "INSERT INTO users (name, surname, sex) VALUES (?,?,?)" INSERT query with positional placeholdersĪs usual, positional placeholders are more concise and easier to use $sql = "INSERT INTO users (name, surname, sex) VALUES (?,?,?)" execute the statement, sending all the actual values in the form of array.replace all actual values with placeholders.In order to run an INSERT query with PDO just follow the steps below: INSERT query with positional placeholdersįirst of all make sure you've got a properly configured PDO connection variable that needs in order to run SQL queries with PDO and to inform you of the possible errors.
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