microtime — 返回当前 Unix 时间戳和微秒数
$microtime = explode(" ", microtime()); print_r($microtime); 打印: array:2 [ 0 => "0.24736700" 1 => "1625040718" ]
microtime — 返回当前 Unix 时间戳和微秒数
$microtime = explode(" ", microtime()); print_r($microtime); 打印: array:2 [ 0 => "0.24736700" 1 => "1625040718" ]