This is explained in my other article, Adding a field name in the ORDER BY clause based on the user's choice: In this case, your variable must be checked against a list of values explicitly written in your script. It's a rare case but it's better to be prepared. Sometimes we have to add a variable that represents another part of a query, such as a keyword or an identifier (a database, table or a field name). PDO also supports named placeholders which some find extremely convenient.
In PDO, we can have the bind and execute parts combined, which is very convenient. $row = $result->fetch_assoc() // or while (.)Īdding data literals using PDO $type = 'testing' $stmt = $mysqli->prepare("SELECT * FROM users WHERE name=?")
PHPRAD VS SCRIPTCASE VS PHP RUNNER HOW TO
The code is a bit complicated but the detailed explanation of all these operators can be found in my article, How to run an INSERT query using Mysqli, as well as a solution that eases the process dramatically.įor a SELECT query you will need to add just a call to get_result() method to get a familiar mysqli_result from which you can fetch the data the usual way: $reporter = "John O'Hara" $stmt->bind_param("ss", $type, $reporter) $query = "INSERT INTO contents (type, reporter, description) Adding data literals using mysqli $type = 'testing'
In your SQL statement, replace all variables with placeholdersĪnd here is how to do it with all popular PHP database drivers: Adding data literals using mysql ext.So as your example only involves data literals, then all variables must be added through placeholders (also called parameters). Any other query part, such as an SQL keyword, a table or a field name, or an operator - must be filtered through a white list.Any variable that represents an SQL data literal, (or, to put it simply - an SQL string, or a number) MUST be added through a prepared statement.The rules of adding a PHP variable inside of any MySQL statement are plain and simple: