Several methods for php scheduled task execution

Several methods for php scheduled task execution

Ignore_user_abort (true ); Set_time_limit (0 ); Function write_txt (){ If (! File_exists(”test.txt ")){ $ Fp = fopen(‑test.txt "," wb "); Fclose ($ fp ); } $ Str = file_get_contents('test.txt '); $ Str. = "\ r \ n". date ("H: I: s "); $ Fp = fopen(‑test.txt "," wb "); Fwrite ($ fp, $ str ); Fclose ($ fp ); } Function do_cron (){ Usleep (20000000 ); Write_txt (); } While (1 ){ Do_cron (); } Two key functions: ignore_user_abort (true). The function is used to execute the following code regardless of whether the client closes the browser. Set_time_limit (0). The function is used to cancel the execution time of the php file. if this function is not available, the default php execution time is 30 seconds, that is, 30 seconds later, this file says goodbay. In addition, usleep supports the windows operating system after PHP5.0. We often encounter this problem when sending php Mail, that is, users need to regularly send some materials to their mailboxes for subscription. I searched the internet and found that there are not many such articles. This article introduces a method implemented using PHP. I have not used PHP for a long time. welcome to PP. 1. scheduled transmission is the main solution to the problem. When writing a program, you need to add a message if at a certain time = a certain time. however, to implement this process, the problem is that we need to execute this page before sending the message. Therefore, the main problem to be solved is how to make the server regularly execute this page at that time, which seems difficult to implement. 2. open the php manual and find the PHP command line mode. 3. Solution: 1. on Windows, you can set cli \ php.exe and. the double-click attribute of the php file is associated. you can also compile a batch file to execute the script in PHP. We put the program in a directory, as shown in figure E: \ web \ Timesend. php #! /Usr/bin/php Require_once ("E: \ web \ shortdes \ config. php "); Require_once ("E: \ web \ shortdes \ class \ mail. class. php "); Require_once ("E: \ web \ shortdes \ class \ smtp. class. php "); // + ------ + // Database configuration $ Dbhost = "localhost "; $ Dbport = "3306 "; $ Dbname = ""; $ Dbuser = ""; $ Dbpawd = ""; // + --------- + // Database connection object $ Db = new dbLink ($ dbhost, $ dbport, $ dbuser, $ dbpawd, $ dbname ); $ Query = "SELECT * FROM wl_mailtemplate WHERE mt_name = 'userupdate '"; $ Mailtemplate = $ db-> dbQuery ($ query ); $ Username = 'sdfsdfdsd '; $ Sex = "Sir "; $ Accounts = "sdfasdfasdfsad "; $ Password = "sdfsadfsdasdasddssfds "; $ Message =" $ Message = addslashes ($ message ); Eval_r ("\ $ message = \" $ message \";"); $ Mail = new SendMail ('wfits @ jbxue.com ', $ mailtemplate [0] ['Mt _ subject'], nl2br ($ message )); If ($ mail-> Send ()) { $ Feedback = "The modification confirmation information has been sent to your registration Email and the current logon has been canceled. \ N check the confirmation letter and obtain a new logon password. "; Echo $ feedback; } ?> Write a bat file. @ D: \ php \ cli \ php.exe E: \ web \ mail. php> d: \ php \ cli \ sendmail. log Pause Save timesend. bat in the @ D: \ php \ cli \ php.exe directory. Add a scheduled task to the window! 5. description. 1. I use a template to store emails in the database, and two other mail sending classes are not provided. if you want to, contact me. 2. use the absolute path when using requrie_once. 3. the PHP command line mode allows the PHP script to run independently of the WEB server. Therefore, it can reduce the burden on the server if a large number of emails are sent. 4. once again, we suggest you look at the PHP command line mode in chapter 23rd of the PHP Manual. In fact, this is not a real method to implement automatic mail sending, but in the WEB mode of the desktop application, this may be a better way ~!, I think there is still a desktop application on the server side to support the system that implements automatic mail sending! Therefore, the implementation of automatic mail sending is only one way to implement the PHP program to send mail! ". $ Mailtemplate [0] ['Mt _ message']." "; Ignore_user_abort (); // The PHP script can be executed even if the Client is disconnected (such as the browser is disabled. Set_time_limit (0); // the execution time is unlimited. the default php execution time is 30 seconds. you can use set_time_limit (0) to limit the execution of the program. $ Interval = 20; // time interval in seconds $ Key_file = "key.txt"; // configuration file If (isset ($ _ GET ['s ']) { If ($ _ GET ['s '] = "0") {// stop the job, but do not exit $ S = "false "; Echo "Function is off "; } Elseif ($ _ GET ['s '] = "1") {// Work $ S = "true "; Echo "Function is on "; } Elseif ($ _ GET ['s '] = "2") {// exit $ S = "die "; Echo "Function exited "; } Else Die ("Err 0: stop working 1: working 2: exit "); $ String =" "; Write_inc ($ key_file, $ string, true ); Exit (); } If (file_exists ($ key_file )){ Do { $ Mkey = include $ key_file; If ($ mkey = "true") {// if the job /// // Work interval //////// $ Showtime = date ("Y-m-d H: I: s "); $ Fp = fopen('func.txt ', 'A '); Fwrite ($ fp, $ showtime. "\ n "); Fclose ($ fp ); //////////////// } Elseif ($ mkey = "die") {// if you exit Die ("I am dying! "); } Sleep ($ interval); // Wait $ interval minutes } While (true ); } Else Die ($ key_file. "doesn't exist! "); // By bbs.it-home.org Function write_inc ($ path, $ strings, $ type = false) { $ Path = dirname (_ FILE _). "/". $ path; If ($ type = false) File_put_contents ($ path, $ strings, FILE_APPEND ); Else File_put_contents ($ path, $ strings ); } ?>