Can You Reuse Named Placeholders in PDO Parameterized Queries?

PDO Parameterized Queries: Can Named Placeholders Be Reused?

In PHP, named placeholders are often used to improve the security and readability of database queries by preventing SQL injection. A common question that arises is whether it's possible to reuse the same named placeholder multiple times in a single statement.

Unfortunately, as indicated by the documentation for PDO::prepare, "you cannot use a named parameter marker of the same name twice in a prepared statement." This implies that using the same named placeholder (:Param) for both placeholders in the query provided (SELECT :Param FROM Table WHERE Column = :Param) will result in an error.

Therefore, it's not possible to reuse named placeholders in this way. If you need to refer to the same value multiple times in a query, you'll need to use separate named placeholders or bind different values to the same placeholder in different portions of the query.

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