php-Time Summary

Get the start and end of the time stamp of the week (This day)
Time stamp of the week Monday
$monday = mktime (0, 0, 0, date ("M", Strtotime ("last Monday")), date ("D", Strtotime ("Last Monday"), Date ("Y", Strtotime ("l AST Monday ")));
Time stamp of the week Sunday
$sunday = mktime (0, 0, 0, date ("M", Strtotime ("next Sunday")), date ("D", Strtotime ("next Sunday")), date ("Y", Strtotime ("N Ext Sunday ")));

Start timestamp today
$lastSecToday = mktime (0, 0, 0, date ("M"), Date ("D") +1, Date ("Y"))-1;
End time Stamp today
$firstSecToday = mktime (0, 0, 0, date ("M"), Date ("D"), Date ("Y"));