Question

How do I get the value of tracking_id from a string similar to the string below:

action_type=PAY&transaction_type=Adaptive+Payment+PAY&tracking_id=bovxedxgM&status=COMPLETED&

That is just a snipped of a much longer string.

Answer 1

Use parse_str():

parse_str('your-string-here', $data);
echo $data['tracking_id'];