MySQL stored procedure caused `Commands out of sync`

Question

Call procedure works all right in MySQL terminal, but in PHP, caused Commands out of sync; you can\'t run this command nowCommands out of sync; you can\'t run this com

Answer 1

i know it is late and there is already an answer, but i was getting the same message for a whole different reason, so i will leave my solution here:

it was actually a very silly error. It was just a typo in a parameter name. My function had a parameter named preferable:

create function call_client (pereferable int, client_id int) returns int 

in the function body, i was using the parameter preferable with the wrong name:

if prefered  = 1 then
  ...
end if;

once i changed prefered for preferable it started working again.