PHP Loop output array cannot be read, how to resolve

PHP Loop output array cannot be read
$cart = mysql_query ("select * from Qiyu_cart where cart_order=410010268");
while ($row 11=mysql_fetch_array ($cart)) {
$cart 1 = mysql_query ("select * from Qiyu_food where food_id=". $row 11[' Cart_food ']);
$row 1=mysql_fetch_array ($cart 1);
$arr = Array ($row 1[' Food_name '). "
"
);
echo $arr. "
";
}
I want to make a set of data output,
$arr. If the output is an array instead of $row1[' food_name '). What's wrong with the content??
------to solve the idea----------------------
$arr = Array ($row 1[' Food_name '). "
"
should be for
$arr [] = Array ($row 1[' food_name ')
Or
$arr. = $row 1[' food_name '). "
";

echo $arr. "
";
should be for
echo Join ('
' $arr). "
";
Or
echo $arr. "
";

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