How does PHP handle duplicate parameter names in prepared statements, and what are the potential issues that can arise?

When using prepared statements in PHP, duplicate parameter names are not allowed as they can lead to ambiguity and potential errors in the query execution. To avoid this issue, ensure that each parameter in the SQL query has a unique name by assigning distinct names to each parameter placeholder. 

// Example of using unique parameter names in a prepared statement
$stmt = $pdo->prepare("SELECT * FROM table WHERE column1 = :param1 AND column2 = :param2");
$stmt->bindParam(':param1', $value1);
$stmt->bindParam(':param2', $value2);
$stmt->execute();

Keywords

PHP prepared statements duplicate parameter names SQL injection error handling

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