PHP should be said to be relatively weak in this regard. If you only use PHP to implement it, it can be implemented as follows:
').addClass('pre-numbering').hide(); $(this).addClass('has-numbering').parent().append($numbering); for (i = 1; i ').text(i)); }; $numbering.fadeIn(1700); }); });The above introduces the implementation of pure PHP scheduled execution tasks, including the relevant aspects. I hope it will be helpful to friends who are interested in PHP tutorials.