Why Does PDO Add Quotes to LIMIT Clause Variables and How Can I Fix It?

Error in LIMIT Clause with bindValue Method

In an attempt to implement pagination, a developer encountered an SQL syntax error while using the bindValue method with the LIMIT clause. The query threw an error stating that single quotes were being added to the variables in the LIMIT portion.

Upon further investigation, the developer discovered a potential relation to a known bug in PHP (bugid 44639) that had been documented since 2008. This bug suggested that PDO might be automatically adding quotes to non-string variables in the LIMIT clause.

Solutions:

A solution to resolve this issue was provided by casting the value to an integer before passing it to the bind function. With this modification, the SQL statement would be able to correctly interpret the variables and execute the query without syntax errors. The updated code snippet would look like the following:

$fetchPictures->bindValue(':skip', (int) trim($_GET['skip']), PDO::PARAM_INT);

The above is the detailed content of Why Does PDO Add Quotes to LIMIT Clause Variables and How Can I Fix It?. For more information, please follow other related articles on the PHP Chinese website!