How can a PHP developer ensure that the number of bound variables matches the number of tokens in a SQL query?

To ensure that the number of bound variables matches the number of tokens in a SQL query, a PHP developer can count the number of placeholders in the query and compare it to the number of variables being bound. This can be done by using functions like substr_count() to count the occurrences of placeholders in the query and then checking if it matches the number of variables being bound. 

$query = "INSERT INTO table_name (column1, column2) VALUES (?, ?)";
$placeholdersCount = substr_count($query, '?');
$boundVariablesCount = count($variables);

if ($placeholdersCount !== $boundVariablesCount) {
    // Handle the error, throw an exception, or take appropriate action
} else {
    // Proceed with binding the variables and executing the query
}

Keywords

PHP PDO prepared statements SQL injection error handling

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