* 毫秒级转化成时间 | 传入参 | 说明 | | --- | --- | | str | \[ 选填 \] 指定毫秒级时间戳 | | 回调参 | 说明 | | --- | --- | | [ stamp ] | 毫秒级时间 | * 案例 ~~~ $obj = $T_T->mic_time(); $obj = $T_T->mic_time('1507602030123'); ~~~ > 2020-10-11 18:23:33:820 2017-10-10 10:20:30:123