我正在嘗試獲取最小的開始值和最大值結束下面的對象。該對象是一個sql腳本的結果。選擇一個對象的最小值和最大值
object(CI_DB_mysql_result)[18]
public 'conn_id' => resource(54, mysql link persistent)
public 'result_id' => resource(61, mysql result)
public 'result_array' =>
array (size=0)
empty
public 'result_object' =>
array (size=3)
0 =>
object(stdClass)[16]
public 'id' => string '601' (length=3)
public 'scheduled' => string '0' (length=1)
public 'start' => string '2014-10-17 06:00:00' (length=19)
public 'end' => string '2014-10-17 11:00:00' (length=19)
1 =>
object(stdClass)[19]
public 'id' => string '602' (length=3)
public 'scheduled' => string '0' (length=1)
public 'start' => string '2014-10-17 18:00:00' (length=19)
public 'end' => string '2014-10-17 19:30:00' (length=19)
2 =>
object(stdClass)[20]
public 'id' => string '603' (length=3)
public 'scheduled' => string '1' (length=1)
public 'start' => string '2014-10-17 11:00:00' (length=19)
public 'end' => string '2014-10-17 18:00:00' (length=19)
public 'custom_result_object' =>
array (size=0)
empty
public 'current_row' => int 0
public 'num_rows' => int 3
public 'row_data' => null
在這種情況下啓動的最小值=「2014年10月17日6點00分00秒」和端部的最大值=「2014年10月17日19:30:00」。所以我正在尋找的結果如下所示:
$smallest_start_value = '2014-10-17 06:00:00';
$biggest_end_value = '2014-10-17 19:30:00';
應該如何計算這個結果?
功能:
function unschedule_resource() {
$event_id = 4;//$_POST['event_id'];
$event_start = '2014-10-17 11:00:00';//$_POST['event_start'];
$event_end = '2014-10-17 18:00:00';//$_POST['event_end'];
// Get resource id
$this->db->select('
event.resource_id'
);
$this->db->from('promo_manager.event');
$this->db->where('event.id =', $event_id);
$data = $this->db->get();
foreach ($data->result() as $row) {
echo $row->resource_id . "<br>";
$resource_id = $row->resource_id;
}
// Get resource events to unschedule
$this->db->select('
resource_calendar.id,
resource_calendar.scheduled,
resource_calendar.start,
resource_calendar.end'
);
$this->db->from('promo_manager.resource_calendar');
$this->db->where('resource_calendar.resource_id =', $resource_id);
$this->db->where('resource_calendar.start =', $event_start);
$this->db->where('resource_calendar.end =', $event_end);
$this->db->or_where('resource_calendar.end =', $event_start);
$this->db->or_where('resource_calendar.start =', $event_end);
$data = $this->db->get();
$lowest_value = null;
$highest_value = null;
foreach ($data as $the_key => $the_value) {
if ($the_key == 'start') {
if ($lowest_value === null) {
$lowest_value = $the_value;
}
if ($the_value < $lowest_value) {
$lowest_value = $the_value;
}
}
}
//echo $lowest_value;
var_dump ($lowest_value) ;
}
嗨,山姆,thx的解決方案。不幸的是,當我執行var_dump時,我得到NULL值。當我回應價值時,我沒有看到任何結果。我做錯了什麼?請參閱上面的完成函數... – MikeTSF 2014-10-06 17:59:30
您只是遍歷一個對象的屬性。如果'result_object'應該指向包含這些對象的數組,'$ the_key'將始終爲數字,因此'start'的比較失敗。 – dognose 2014-10-06 18:02:35
那麼我應該如何解決這個問題,dognose? – MikeTSF 2014-10-06 18:05:29