PHP's powerful time conversion function strtotime_php skills

Use strtotime to convert time strings in various formats into timestamps

Convert regular time format

echo date('Y-m-d H:i:s', strtotime('2016-01-30 18:00')).PHP_EOL;
echo date('Y-m-d H:i:s', strtotime('20160130180001')).PHP_EOL;
 

Convert natural time description

//昨天
echo date('Y-m-d H:i:s', strtotime('yesterday')).PHP_EOL;
//上周
echo date('Y-m-d H:i:s', strtotime('last week')).PHP_EOL;
//本周开始时间
echo date('Y-m-d H:i:s', strtotime('this week midnight')).PHP_EOL;
//本月开始时间
echo date('Y-m-d H:i:s', strtotime('first day of this month midnight')).PHP_EOL;
 
//计算相对时间
echo date('Y-m-d H:i:s', strtotime('+1 month')).PHP_EOL;

For the complete php time description document, please refer to http://php.net/manual/zh/datetime.formats.relative.php