Call to a member function execute() on boolean in [duplicate]

Answer 1

To catch errors do something like this

    $req = $conn->prepare('INSERT INTO renter (email, msg_text) VALUES(?, ?)');
    if(!$req){
       echo "Prepare failed: (". $conn->errno.") ".$conn->error."
";
    }

since prepare returns a boolean. Please use when debugging you code and refer to error reporting as stated in the comment.