pdo - Invalid argument supplied for foreach in PHP, -


this question has answer here:

i running pdo query on mysql database , error saying there invalid argument supplied foreach. on frontend, pass string $questiontable , integer $questionid.

what doing wrong?

$query = $this->dbconnection->query("select * ('$questiontable') id = ('$questionid')"); foreach ($query $row) {  echo $row; };

is because of shouldn't put '' query? mean: $query = $this->dbconnection->query("select * ($questiontable) id = ($questionid)");


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