Difference between row_array and result_array

问题:

What is the difference between row_array() and result_array()?

How would they be displayed on a view page?

if ($variable) {
    return $result->row_array();
} else {
    return $result->result_array();
}

回答1:

From the documentation, row_array returns a single result and result_array returns multiple results (usually for use in a loop).

Examples from the documentation:

Result_array:

$query = $this->db->query("YOUR QUERY");

foreach ($query->result_array() as $row)
{
   echo $row['title'];
   echo $row['name'];
   echo $row['body'];
}

Row_array:

$query = $this->db->query("YOUR QUERY");

if ($query->num_rows() > 0)
{
   $row = $query->row_array(); 

   echo $row['title'];
   echo $row['name'];
   echo $row['body'];
}

回答2:

1. result_array()

   Returns the query result as a pure array. Typically you’ll use this in a foreach loop.

2. row_array()

   Returns a single result row. If your query has more than one row, it returns only the first row.
   Identical to the row() method, except it returns an array.

回答3:

1) result_array(): return multidimensional array.

2) row_array(): return one-dimensional associative array

So, if you display structured information of each of them you will get something similar to the following:

echo var_dump(result_array());

Output:

array(1) { [0]=> array(4) { ["id"]=> string(1) "1" ["title"]=> string(12) "News title 1" ["slug"]=> string(5) "slug1" ["text"]=> string(57) "In the name of Allah, This is the first news description" } }

echo var_dump(row_array());

Output:

array(4) { ["id"]=> string(1) "1" ["title"]=> string(12) "News title 1" ["slug"]=> string(5) "slug1" ["text"]=> string(10) "description" }