How to Correctly Bind Parameters for a WHERE IN Clause in PDO?

Binding Parameters for WHERE IN Clause Using PDO

When using PDO to execute an SQL query with a WHERE IN clause, it's essential to understand how to bind parameters effectively.

In the provided example:

$sth->bindParam(':ids', $myArray);

The code attempts to bind an array of values to the :ids placeholder. However, this approach is incorrect for an IN clause. When using an IN clause, each value must be specified as a separate parameter, not as an array.

Instead, manually insert the IN list into the query as seen below:

'SELECT foo FROM bar WHERE ids IN (' . $myArray .')'

This ensures that each value in the array is treated as a separate parameter in the IN clause, providing accurate results.

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