Implements: ArrayAccess | SeekableIterator | Traversable | Iterator | Countable
Object used for caching the results of select queries. See Results for usage and examples.
Class declared in MODPATH/database/classes/database/result/cached.php on line 3.
Sets the total number of rows and stores the result locally.
mixed
$result
required - Query resultstring
$sql
required - SQL querymixed
$as_object
= NULL - $as_objectvoidpublic function __construct(array $result, $sql, $as_object = NULL)
{
parent::__construct($result, $sql, $as_object);
// Find the number of rows in the result
$this->_total_rows = count($result);
}Result destruction cleans up all open result sets.
voidpublic function __destruct()
{
// Cached results do not use resources
}Get a cached database result from the current result iterator.
$cachable = serialize($result->cached());
Database_Result_Cachedpublic function cached()
{
return $this;
}public function current()
{
// Return an array of the row
return $this->valid() ? $this->_result[$this->_current_row] : NULL;
}public function seek($offset)
{
if ($this->offsetExists($offset))
{
$this->_current_row = $offset;
return TRUE;
}
else
{
return FALSE;
}
}Return all of the rows in the result as an array.
// Indexed array of all rows
$rows = $result->as_array();
// Associative array of rows by "id"
$rows = $result->as_array('id');
// Associative array of rows, "id" => "name"
$rows = $result->as_array('id', 'name');
string
$key
= NULL - Column for associative keysstring
$value
= NULL - Column for valuesarraypublic function as_array($key = NULL, $value = NULL)
{
$results = array();
if ($key === NULL AND $value === NULL)
{
// Indexed rows
foreach ($this as $row)
{
$results[] = $row;
}
}
elseif ($key === NULL)
{
// Indexed columns
if ($this->_as_object)
{
foreach ($this as $row)
{
$results[] = $row->$value;
}
}
else
{
foreach ($this as $row)
{
$results[] = $row[$value];
}
}
}
elseif ($value === NULL)
{
// Associative rows
if ($this->_as_object)
{
foreach ($this as $row)
{
$results[$row->$key] = $row;
}
}
else
{
foreach ($this as $row)
{
$results[$row[$key]] = $row;
}
}
}
else
{
// Associative columns
if ($this->_as_object)
{
foreach ($this as $row)
{
$results[$row->$key] = $row->$value;
}
}
else
{
foreach ($this as $row)
{
$results[$row[$key]] = $row[$value];
}
}
}
$this->rewind();
return $results;
}Implements Countable::count, returns the total number of rows.
echo count($result);
integerpublic function count()
{
return $this->_total_rows;
}Return the named column from the current row.
// Get the "id" value
$id = $result->get('id');
string
$name
required - Column to getmixed
$default
= NULL - Default value if the column does not existmixedpublic function get($name, $default = NULL)
{
$row = $this->current();
if ($this->_as_object)
{
if (isset($row->$name))
return $row->$name;
}
else
{
if (isset($row[$name]))
return $row[$name];
}
return $default;
}Implements Iterator::key, returns the current row number.
echo key($result);
integerpublic function key()
{
return $this->_current_row;
}Implements Iterator::next, moves to the next row.
next($result);
$thispublic function next()
{
++$this->_current_row;
return $this;
}Implements ArrayAccess::offsetExists, determines if row exists.
if (isset($result[10]))
{
// Row 10 exists
}
int
$offset
required - $offsetbooleanpublic function offsetExists($offset)
{
return ($offset >= 0 AND $offset < $this->_total_rows);
}Implements ArrayAccess::offsetGet, gets a given row.
$row = $result[10];
int
$offset
required - $offsetmixedpublic function offsetGet($offset)
{
if ( ! $this->seek($offset))
return NULL;
return $this->current();
}Implements ArrayAccess::offsetSet, throws an error.
You cannot modify a database result.
int
$offset
required - $offsetmixed
$value
required - $valuevoidfinal public function offsetSet($offset, $value)
{
throw new Kohana_Exception('Database results are read-only');
}Implements ArrayAccess::offsetUnset, throws an error.
You cannot modify a database result.
int
$offset
required - $offsetvoidfinal public function offsetUnset($offset)
{
throw new Kohana_Exception('Database results are read-only');
}Implements Iterator::prev, moves to the previous row.
prev($result);
$thispublic function prev()
{
--$this->_current_row;
return $this;
}Implements Iterator::rewind, sets the current row to zero.
rewind($result);
$thispublic function rewind()
{
$this->_current_row = 0;
return $this;
}Implements Iterator::valid, checks if the current row exists.
This method is only used internally.
booleanpublic function valid()
{
return $this->offsetExists($this->_current_row);
}