Codeigniter array format

Question

When a creating an array and get value of an certain column from the database, I have a array format whether is this the same or not?

$result['user_name'] and $result[0]->user_name

Answer 1

At this point, it's just 'regular' PHP. As @RashFlash pointed out, many times in Codeigniter, an array or object is created from the database result. The documentation for that is here: https://www.codeigniter.com/userguide3/database/results.html

So your first $result['user_name'] is just referencing an array where the key is 'user_name' and the latter is referencing a property of the first object in the array.

Often the processing/display of database results goes something like this object based example (taken from the above documentation).

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

foreach ($query->result() as $row)
{
        echo $row->title;
        echo $row->name;
        echo $row->body;
}

or

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

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

Answer 2

When a creating an array and get value of an certain column from the database, i have a array format whether is this the same or not?

 $result['user_name'] and $result[0]->user_name

In codeigniter

$query->result() ;  // returns object

$query->result_array(); // returns array

$query->row();  // returns object

$query->row_array(); // returns array

In PHP (very basic)

To access array elements you have to use either [] or which you don't see that much, but which you can also use is {} .

echo $array[0];
echo $array{0};

To access an object property you have to use -> .

echo $object->property;

If you have an object in another object you just have to use multiple -> to get to your object property.

echo $objectA->objectB->property;

Accessing Array:

$ php -r '$a=array("s"=>123); echo $a{"s"}.PHP_EOL; echo $a["s"].PHP_EOL;'
123
123

Accessing Object:

php -r '$a=$b=new stdClass; $a->s="test"; $b->t="second"; $a->r=$b; echo $a->s.PHP_EOL; echo $a->r->t.PHP_EOL;'
test
second