For example, if such processing is the only action that needs to be taken, or if the data needs to be pre-processed somehow before use.īut the most preferred way to fetch multiple rows which would to be shown on a web-page is calling the great helper method called fetchAll(). ![]() This method could be recommended if rows have to be processed one by one. The most traditional way is to use the fetch() method within a while loop: $stmt = $pdo -> query ( "SELECT * FROM users" ) There are two ways to fetch multiple rows returned by a query. ![]() Note that in PHP you can "chain" method calls, calling a method of the returned object already, like: $user = $pdo -> query ( "SELECT * FROM users ORDER BY id DESC LIMIT 1" )-> fetch () Selecting multiple rows $stmt = $pdo -> query ( "SELECT * FROM users ORDER BY id DESC LIMIT 1" ) If a query is supposed to return just a single row, then you can just call fetch() method of the $stmt variable: // getting the last registered user This will give us an $stmt object that can be used to fetch the actual rows. $stmt = $pdo -> query ( "SELECT * FROM users" ) If there are no variables going to be used in the query, we can use a conventional query() method instead of prepare and execute. Just 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. I will show examples for the every case so you can choose one that suits you best. There are several ways to run a SELECT query using PDO, that differ mainly by the presence of parameters, type of parameters, and the result type. ![]() SELECT query with positional placeholders.
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