What are some common pitfalls when passing parameters from jQuery to PHP?

One common pitfall when passing parameters from jQuery to PHP is not properly encoding the data before sending it. This can lead to errors or security vulnerabilities. To solve this, make sure to use functions like encodeURIComponent() in JavaScript to encode the data before sending it to PHP. 

// PHP code to receive encoded parameters from jQuery
$data = json_decode(file_get_contents("php://input"), true);
$param1 = urldecode($data['param1']);
$param2 = urldecode($data['param2']);

// Use $param1 and $param2 in your PHP code

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