PHP uses javascript-setInterval to execute a function at intervals.

PHP automatically executes (pause) a page at a certain time. when sending an email, you cannot send all submitted emails at once, at first, I thought of the sleep () function in PHP.

PHP automatically executes (pause) a page at a certain time. when sending an email, you cannot send all submitted emails at once, at first, I thought of the sleep () function in PHP, but sleep didn't actually sleep. PHP used javascript-setInterval to execute a function cyclically at intervals. let's talk about the specific usage of setInterval:
SetInterval ("function", time); parameter 1. customize a function. parameter 2. interval

The following uses my project as an example: PHP uses javascript to execute an instance before a project cyclically at intervals:
 

XML/HTML code

2. Function UpdateNew ()
3. {
4. UpdateMe ("54545.php ");
5. }
6. Script
7. Updated on:
8. OnClick = "var t = parseInt (jj. value); setInterval (UpdateNew (), t);"/>