Php 如何从DateTime对象获取日期

Php 如何从DateTime对象获取日期,php,arrays,object,Php,Arrays,Object,如何从DateTime对象获取日期 输出为: Array ( [0] => stdClass Object ( [instrument_token] => 16796674 [exchange_token] => 65612 [tradingsymbol] => DABUR18MAR445CE [name] => [last_price] => 0.05

如何从
DateTime
对象获取日期

输出为:

Array (
    [0] => stdClass Object ( 
        [instrument_token] => 16796674 
        [exchange_token] => 65612 
        [tradingsymbol] => DABUR18MAR445CE 
        [name] => 
        [last_price] => 0.05 
        [expiry] => DateTime Object ( 
            [date] => 2018-03-28 00:00:00.000000 
            [timezone_type] => 3 
            [timezone] => asia/kolkata 
        ) 
        [strike] => 445 
        [tick_size] => 0.05 
        [lot_size] => 2500 
        [instrument_type] => CE 
        [segment] => NFO-OPT 
        [exchange] => NFO 
    )
)

DateTime对象
这里是对象的字符串表示形式(请参阅)

您可以使用来获取所需的字符串:

$date_str = $array[0]->expiry->format('Y-m-d H:i:s');