How to implement scheduled execution tasks in php _ PHP Tutorial

Implement the scheduled execution task method in php. PHP script execution time limit. the default solution is 30 m: set_time_limit (); or modify PHP. setting max_execution_time in ini (not recommended) to use php to refresh the browser must solve the PHP script execution time limit. the default solution is 30 MB: set_time_limit (); or modify PHP. set max_execution_time in ini (not recommended)

Several problems need to be solved to refresh the browser using php
If the browser of the client is closed, the program may be terminated. Solution: ignore_user_abort can still run normally even if the page is closed.
If the program runs continuously, it may consume a lot of resources. the solution is to use sleep to sleep the program for a while, and then run
PHP code regularly executed:

The code is as follows:

Ignore_user_abort (); // close the browser and run the PHP script. Set_time_limit (3000); // you can use set_time_limit (0) to run the program without restrictions. $ Interval = 5; // run every 5s // Method 1 -- Endless loop Do { Echo 'test'. time ().' '; Sleep ($ interval); // wait for 5 s } While (true ); // Method 2 --- regular sleep execution Require_once './curlClass. php'; // introduce the file $ Curl = new httpCurl (); // instantiate $ Stime = $ curl-> getmicrotime (); For ($ I = 0; $ I <= 10; $ I ++ ){ Echo 'test'. time ().' '; Sleep ($ interval); // wait for 5 s } Ob_flush (); Flush (); $ Etime = $ curl-> getmicrotime (); Echo ''; Echo round ($ etime-stime), 4); // program execution time

Handler solution: set_time_limit (); or modify PHP. ini to set max_execution_time (not recommended). use php to refresh the browser...