Php three methods similar to multithreading

Source: Internet
Author: User
This article mainly introduces three methods similar to multithreading in php. For more information, see

This article mainly introduces three methods similar to multithreading in php. For more information, see

1. curl_multi Method

When multithreading is required, you can use curl_multi to request multiple operations at a time. However, curl uses network communication, and the efficiency and reliability are relatively poor.

Function main () {$ SQL = "select waybill_id, order_id from waybill where status> 40 order by update_time desc limit 10"; $ data = Yii: app () -> db-> createCommand ($ SQL)-> queryAll (); // yii framework format foreach ($ data as $ k => $ v) {if ($ k % 2 = 0) {// send an even url $ send_data [$ k] ['url'] = ''; $ send_data [$ k] ['body'] = $ v ['waybill _ id'];} else {// send another url with an odd number $ send_data [$ k] ['url'] =' http://www.abc.com '; $ Send_data [$ k] ['body'] = array ($ v ['order _ id'] => array ('extra' => 16 ));}} $ back_data = sendMulitRequest ($ send_data); var_dump ($ back_data);} function sendMulitRequest ($ send_data) {$ params = array (); $ curl = $ text = array (); $ handle = curl_multi_init (); foreach ($ data as $ k => $ v) {if (empty ($ v ['url']) {$ v ['url'] =" http://www.xxx.com "; // If url is empty, set defalut url} $ reqBody = json_encode ($ v ['body']); $ reqStream = array ('body' => $ reqBody,); $ encRequest = base64_encode (json_encode ($ reqStream); $ params ['data'] = $ encRequest; $ curl [$ k] = curl_init (); curl_setopt ($ curl [$ k], CURLOPT_URL, $ v ['url']); curl_setopt ($ curl [$ k], CURLOPT_POST, TRUE); curl_setopt ($ curl [$ k], CURLOPT_HEADER, 0); curl_setopt ($ curl [$ k], CURLOPT_POSTFIELDS, http_bu Ild_query ($ params); curl_setopt ($ curl [$ k], CURLOPT_RETURNTRANSFER, 1); curl_multi_add_handle ($ handle, $ curl [$ k]);} $ active = null; do {$ mrc = curl_multi_exec ($ handle, $ active);} while ($ mrc = CURLM_CALL_MULTI_PERFORM); while ($ active & $ mrc = CURLM_ OK) {if (curl_multi_select ($ handle )! =-1) {do {$ mrc = curl_multi_exec ($ handle, $ active);} while ($ mrc = CURLM_CALL_MULTI_PERFORM );}} foreach ($ curl as $ k => $ v) {if (curl_error ($ curl [$ k]) = "") {$ text [$ k] = (string) curl_multi_getcontent ($ curl [$ k]);} curl_multi_remove_handle ($ handle, $ curl [$ k]); curl_close ($ curl [$ k]);} curl_multi_close ($ handle); return $ text ;}

2. stream_socket_client

Function sendStream () {$ english_format_number = number_format ($ number, 4 ,'. ', ''); echo $ english_format_number; exit (); $ timeout = 10; $ result = array (); $ sockets = array (); $ convenient_read_block = 8192; $ host = "test.local.com"; $ SQL = "select waybill_id, order_id from xm_waybill where status> 40 order by update_time desc limit 1"; $ data = Yii: app () -> db-> createCommand ($ SQL)-> queryAll (); $ id = 0; foreach ($ Data as $ k => $ v) {if ($ k % 2 = 0) {$ send_data [$ k] ['body'] = NoticeOrder :: getSendData ($ v ['waybill _ id']);} else {$ send_data [$ k] ['body'] = array ($ v ['order _ id'] => array ('extra '=> 16 ));} $ data = json_encode ($ send_data [$ k] ['body']); $ s = stream_socket_client ($ host. ": 80", $ errno, $ errstr, $ timeout, STREAM_CLIENT_ASYNC_CONNECT | STREAM_CLIENT_CONNECT); if ($ s) {$ sockets [$ id ++] = $ s; $ http_message = "GET /Php/test. php? Data = ". $ data. "HTTP/1.0 \ r \ nHost :". $ host. "\ r \ n"; fwrite ($ s, $ http_message);} else {echo "Stream ". $ id. "failed to open correctly. ";}} while (count ($ sockets) {$ read = $ sockets; stream_select ($ read, $ w = null, $ e = null, $ timeout ); if (count ($ read) {/* stream_select generally shuffles $ read, so we need tocompute from which socket (s) we're reading. */foreach ($ read as $ r) {$ id = array_search ($ r, $ sockets); $ data = fread ($ r, $ convenient_read_block ); if (strlen ($ data) = 0) {echo "Stream ". $ id. "closes ". date ('H: I: s '). ".
"; Fclose ($ r); unset ($ sockets [$ id]);} else {$ result [$ id] = $ data ;}}} else {/* A time-out means that * all * streams have failedto receive a response. */echo "Time-out! \ N "; break;} print_r ($ result );}

3. Replace multithreading with multiple processes

Function daemon ($ func_name, $ args, $ number) {while (true) {$ pid = pcntl_fork (); if ($ pid =-1) {echo "fork process fail"; exit () ;}elseif ($ pid) {// The created sub-process static $ num = 0; $ num ++; if ($ num >=$ number) {// when the number of processes reaches a certain number, the Child processes are recycled. Pcntl_wait ($ status); $ num -- ;}} else {// if it is 0, it indicates that it was created by a sub-process and directly enters the working state if (function_exists ($ func_name )) {while (true) {$ ppid = posix_getpid (); var_dump ($ ppid); call_user_func_array ($ func_name, $ args); sleep (2 );}} else {echo "function is not exists";} exit () ;}} function worker ($ args) {// do something} daemon ('worker ', array (1), 2 );

The above are the three php implementation methods similar to multithreading, and hope to help you learn.

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