Use Strtotime to convert time strings in various formats to timestamps
Convert General time format
Convert Natural Time Description
Yesterday echo date (' y-m-d h:i:s ', Strtotime (' Yesterday ')). php_eol;//last week, echo date (' y-m-d h:i:s ', Strtotime (' Previous week ')). php_eol;//starts this week with Echo date (' y-m-d h:i:s ', Strtotime (' This Week Midnight ')). php_eol;//starts this month with echo date (' y-m-d h:i:s ', Strtotime (' first day of this month Midnight '). Php_eol; Calculates the relative time of the echo date (' y-m-d h:i:s ', Strtotime (' +1 month ')). Php_eol;
The full PHP time description document can refer to http://php.net/manual/zh/datetime.formats.relative.php
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