PHP implements multi-threaded code

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PHP itself does not support multi-threading For threads, we can handle multi-threading virtually through PHP's own functions. Three functions are introduced below to implement multi-processing.

1. fsockopen, open a network connection or a Unix socket connection. Among them, stream_set_blocking() - sets blocking or blocking mode for resource flow

* @title: PHP多线程类(Thread) * @version: 1.0 * * PHP多线程应用示例： * require_once 'thread.class.php'; * $thread = new thread(); * $thread->addthread('action_log','a'); * $thread->addthread('action_log','b'); * $thread->addthread('action_log','c'); * $thread->runthread(); * * function action_log($info) { * $log = 'log/' . microtime() . '.log'; * $txt = $info . "rnrn" . 'Set in ' . Date('h:i:s', time()) . (double)microtime() . "rn"; * $fp = fopen($log, 'w'); * fwrite($fp, $txt); * fclose($fp); * } */ class thread { var $hooks = array(); var $args = array(); function thread() { } function addthread($func) { $args = array_slice(func_get_args(), 1); $this->hooks[] = $func; $this->args[] = $args; return true; } function runthread() { if(isset($_GET['flag'])) { $flag = intval($_GET['flag']); } if($flag || $flag === 0) { call_user_func_array($this->hooks[$flag], $this->args[$flag]); } else { for($i = 0, $size = count($this->hooks); $i < $size; $i++) { $fp=fsockopen($_SERVER['HTTP_HOST'],$_SERVER['SERVER_PORT']); stream_set_blocking($fp,0); if($fp) { $out = "GET {$_SERVER['PHP_SELF']}?flag=$i HTTP/1.1rn"; $out .= "Host: {$_SERVER['HTTP_HOST']}rn"; $out .= "Connection: Closernrn"; fputs($fp,$out); fclose($fp); } } } } }

## 2. stream_socket_client, the new stream_socket_client can be used in PHP5 () function directly replaces fsocketopen(). Among them, stream_set_blocking() - sets blocking or blocking mode for resource flow

\n"; } else { fwrite($fp, "GET / HTTP/1.0\r\nHost: www.example.com\r\nAccept: */*\r\n\r\n"); while (!feof($fp)) { echo fgets($fp, 1024); } fclose($fp); } ?>

3. curl_multi, when multiple threads are needed, curl_multi can be used once It requires multiple operations to complete, but curl uses network communication, so the efficiency and reliability are relatively poor.

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[$k], CURLOPT_POSTFIELDS, http_build_query($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; }

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