php - Commands out of sync; you can't run this command now on $mysqli->prepare -


i have php function called getnumrows:

function getnumrows() {     $query = $this->mysqli->prepare("call getnumrows('$this->tablename')") or die('unable prepare: ' . $this->mysqli->error);     $query->execute();     $query->store_result();     $query->bind_result($rowcount);     while ($query->fetch()) {         $numrows = $rowcount;     }     $query->close();      return $numrows; }

which uses stored procedure call getnumrows('tablename'):

drop procedure gpstrack.getnumrows; create definer=`******`@`localhost` procedure `getnumrows`( in tab_name varchar( 40 ) ) begin  set @t1 = concat(  'select count(*) ', tab_name) ; prepare stmt3 @t1 ; execute stmt3; deallocate prepare stmt3; end;

but fails on row #1 of function with:

unable prepare: commands out of sync; can't run command now

how can use procedure number of rows of table?

i able fix using php:

function getnumrows() {     $query = $this->mysqli->prepare("call getnumrows('$this->tablename')") or die('unable prepare: ' . $this->mysqli->error);      $query->execute();     $query->store_result();     $query->bind_result($rowcount);     $query->fetch();     $numrows = $rowcount;     $this->mysqli->next_result();// added line     $query->close();      return $numrows; }

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