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本文實例講述了php curl批處理實現可控并發異步操作。分享給大家供大家參考，具體如下：

通常情況下 PHP 中的 cURL 是阻塞運行的，就是說創建一個 cURL 請求以后必須等它執行成功或者超時才會執行下一個請求:API接口訪問一般會首選CURL

在實際項目或者自己編寫小工具(比如新聞聚合,商品價格監控,比價)的過程中, 通常需要從第3方網站或者API接口獲取數據, 在需要處理1個URL隊列時, 為了提高性能, 可以采用cURL提供的curl_multi_*族函數實現簡單的并發.

<?php
include 'curl.class.php';
function callback($response, $info, $error, $request)
{
 echo 'response:<br>';
 print_r($response);
 echo '<br>' . date("Y-m-d H:i:s") . '   <br>';
 echo '<br>' . str_repeat("-", 100) . '<br>';
}
$USER_COOKIE = (!empty($_REQUEST['cookie'])) ? $_REQUEST['cookie'] : file_get_contents("cookie.txt");
$curl = new Curl ("callback");
$data = array(
 array(
  'url' => 'http://dyactive2.vip.xunlei.com/com_sign/?game=qmr&type=rec_gametime&referfrom=&rt=0.42521539455332336', //秦美人
  'method' => 'POST',
  'post_data' => '',
  'header' => null,
  'options' => array(
   CURLOPT_REFERER => "http://niu.xunlei.com/entergame/?gameNo=qmr&fenQuNum=3",
   CURLOPT_COOKIE => $USER_COOKIE,
  )
 ),
 array(
  'url' => 'http://dyactive2.vip.xunlei.com/com_sign/?game=sq&type=rec_gametime&referfrom=&rt=0.42521539455332336', //神曲
  'method' => 'POST',
  'post_data' => '',
  'header' => null,
  'options' => array(
   CURLOPT_REFERER => "http://niu.xunlei.com/entergame/?gameNo=sq&fenQuNum=41",
   CURLOPT_COOKIE => $USER_COOKIE,
  )
 ),
 array(
  'url' => 'http://dyactive2.vip.xunlei.com/com_sign/?game=frxz&type=rec_gametime&referfrom=&rt=0.42521539455332336', //凡人修真
  'method' => 'POST',
  'post_data' => '',
  'header' => null,
  'options' => array(
   CURLOPT_REFERER => "http://niu.xunlei.com/entergame/?gameNo=frxz&fenQuNum=3",
   CURLOPT_COOKIE => $USER_COOKIE,
  )
 ),
 array(
  'url' => 'http://dyactive2.vip.xunlei.com/com_sign/?game=smxj&type=rec_gametime&referfrom=&rt=0.42521539455332336', //神魔仙界
  'method' => 'POST',
  'post_data' => '',
  'header' => null,
  'options' => array(
   CURLOPT_REFERER => "http://niu.xunlei.com/entergame/?gameNo=smxj&fenQuNum=2",
   CURLOPT_COOKIE => $USER_COOKIE,
  )
 ),
 array(
  'url' => 'http://dyactive2.vip.xunlei.com/com_sign/?game=qsqy&type=rec_gametime&referfrom=&rt=0.42521539455332336', //傾世情緣
  'method' => 'POST',
  'post_data' => '',
  'header' => null,
  'options' => array(
   CURLOPT_REFERER => "http://niu.xunlei.com/entergame/?gameNo=qsqy&fenQuNum=11",
   CURLOPT_COOKIE => $USER_COOKIE,
  )
 ),
);
foreach ($data as $val) {
 $request = new Curl_request ($val ['url'], $val ['method'], $val ['post_data'], $val ['header'], $val ['options']);
 $curl->add($request);
}
$curl->execute();
echo $curl->display_errors();

使用下來效果很好，沒有副作用，并發數可控，應用之處多多，自己發揮想象吧

<?php
/**
 * cURL批量處理 工具類
 * 
 * @since Version 1.0
 * @author Justmepzy <[email protected]>
 * @link http://t.qq.com/JustPzy
 */
/**
 *單一的請求對象
 */
class Curl_request {
 public $url   = '';
 public $method   = 'GET';
 public $post_data  = null;
 public $headers  = null;
 public $options  = null;
 /**
  * 
  * @param string $url
  * @param string $method
  * @param string $post_data
  * @param string $headers
  * @param array $options
  * @return void
  */
 public function __construct($url, $method = 'GET', $post_data = null, $headers = null, $options = null) {
  $this->url = $url;
  $this->method = strtoupper( $method );
  $this->post_data = $post_data;
  $this->headers = $headers;
  $this->options = $options;
 }
 /**
  * @return void
  */
 public function __destruct() {
  unset ( $this->url, $this->method, $this->post_data, $this->headers, $this->options );
 }
}
/**
 * 包含請求列隊處理
 */
class Curl {
 /**
  * 請求url個數
  * @var int
  */
 private $size    = 5;
 /**
  * 等待所有cURL批處理中的活動連接等待響應時間
  * @var int
  */
 private $timeout   = 5;
 /**
  * 完成請求回調函數
  * @var string
  */
 private $callback   = null;
 /**
  * cRUL配置
  * @var array
  */
 private $options   = array (CURLOPT_SSL_VERIFYPEER => 0,CURLOPT_RETURNTRANSFER => 1,CURLOPT_CONNECTTIMEOUT => 30 );
 /**
  * 請求頭
  * @var array
  */
 private $headers   = array ();
 /**
  * 請求列隊
  * @var array
  */
 private $requests   = array ();
 /**
  * 請求列隊索引
  * @var array
  */
 private $request_map  = array ();
 /**
  * 錯誤
  * @var array
  */
 private $errors   = array ();
 /**
  * @access public
  * @param string $callback 回調函數
  * 該函數有4個參數($response,$info,$error,$request)
  * $response url返回的body
  * $info  cURL連接資源句柄的信息
  * $error  錯誤
  * $request  請求對象
  */
 public function __construct($callback = null) {
  $this->callback = $callback;
 }
 /**
  * 添加一個請求對象到列隊
  * @access public
  * @param object $request
  * @return boolean
  */
 public function add($request) {
  $this->requests [] = $request;
  return TRUE;
 }
 /**
  * 創建一個請求對象并添加到列隊
  * @access public
  * @param string $url
  * @param string $method
  * @param string $post_data
  * @param string $headers
  * @param array $options
  * @return boolean
  */
 public function request($url, $method = 'GET', $post_data = null, $headers = null, $options = null) {
  $this->requests [] = new Curl_request ( $url, $method, $post_data, $headers, $options );
  return TRUE;
 }
 /**
  * 創建GET請求對象
  * @access public
  * @param string $url
  * @param string $headers
  * @param array $options
  * @return boolean
  */
 public function get($url, $headers = null, $options = null) {
  return $this->request ( $url, "GET", null, $headers, $options );
 }
 /**
  * 創建一個POST請求對象
  * @access public
  * @param string $url
  * @param string $post_data
  * @param string $headers
  * @param array $options
  * @return boolean
  */
 public function post($url, $post_data = null, $headers = null, $options = null) {
  return $this->request ( $url, "POST", $post_data, $headers, $options );
 }
 /**
  * 執行cURL
  * @access public
  * @param int $size 最大連接數
  * @return Ambigous <boolean, mixed>|boolean
  */
 public function execute($size = null) {
  if (sizeof ( $this->requests ) == 1) {
   return $this->single_curl ();
  } else {
   return $this->rolling_curl ( $size );
  }
 }
 /**
  * 單個url請求
  * @access private
  * @return mixed|boolean
  */
 private function single_curl() {
  $ch = curl_init ();
  $request = array_shift ( $this->requests );
  $options = $this->get_options ( $request );
  curl_setopt_array ( $ch, $options );
  $output = curl_exec ( $ch );
  $info = curl_getinfo ( $ch );
  // it's not neccesary to set a callback for one-off requests
  if ($this->callback) {
   $callback = $this->callback;
   if (is_callable ( $this->callback )) {
    call_user_func ( $callback, $output, $info, $request );
   }
  } else
   return $output;
  return true;
 }
 /**
  * 多個url請求
  * @access private
  * @param int $size 最大連接數
  * @return boolean
  */
 private function rolling_curl($size = null) {
  if ($size)
   $this->size = $size;
  else 
   $this->size = count($this->requests);
  if (sizeof ( $this->requests ) < $this->size)
   $this->size = sizeof ( $this->requests );
  if ($this->size < 2)
   $this->set_error ( 'size must be greater than 1' );
  $master = curl_multi_init ();
  //添加cURL連接資源句柄到map索引
  for($i = 0; $i < $this->size; $i ++) {
   $ch = curl_init ();
   $options = $this->get_options ( $this->requests [$i] );
   curl_setopt_array ( $ch, $options );
   curl_multi_add_handle ( $master, $ch );
   $key = ( string ) $ch;
   $this->request_map [$key] = $i;
  }
  $active = $done = null;
  do {
   while ( ($execrun = curl_multi_exec ( $master, $active )) == CURLM_CALL_MULTI_PERFORM )
    ;
   if ($execrun != CURLM_OK)
    break;
   //有一個請求完成則回調
   while ( $done = curl_multi_info_read ( $master ) ) {
    //$done 完成的請求句柄
    $info = curl_getinfo ( $done ['handle'] );//
    $output = curl_multi_getcontent ( $done ['handle'] );//
    $error = curl_error ( $done ['handle'] );//
    $this->set_error ( $error );
    //調用回調函數,如果存在的話
    $callback = $this->callback;
    if (is_callable ( $callback )) {
     $key = ( string ) $done ['handle'];
     $request = $this->requests [$this->request_map [$key]];
     unset ( $this->request_map [$key] );
     call_user_func ( $callback, $output, $info, $error, $request );
    }
    curl_close ( $done ['handle'] );
    //從列隊中移除已經完成的request
    curl_multi_remove_handle ( $master, $done ['handle'] );
   }
   //等待所有cURL批處理中的活動連接
   if ($active)
    curl_multi_select ( $master, $this->timeout );
  } while ( $active );
  //完成關閉
  curl_multi_close ( $master );
  return true;
 }
 /**
  * 獲取沒得請求對象的cURL配置
  * @access private
  * @param object $request
  * @return array
  */
 private function get_options($request) {
  $options = $this->__get ( 'options' );
  if (ini_get ( 'safe_mode' ) == 'Off' || ! ini_get ( 'safe_mode' )) {
   $options [CURLOPT_FOLLOWLOCATION] = 1;
   $options [CURLOPT_MAXREDIRS] = 5;
  }
  $headers = $this->__get ( 'headers' );
  if ($request->options) {
   $options = $request->options + $options;
  }
  $options [CURLOPT_URL] = $request->url;
  if ($request->post_data && strtolower($request->method) == 'post' ) {
   $options [CURLOPT_POST] = 1;
   $options [CURLOPT_POSTFIELDS] = $request->post_data;
  }
  if ($headers) {
   $options [CURLOPT_HEADER] = 0;
   $options [CURLOPT_HTTPHEADER] = $headers;
  }
  return $options;
 }
 /**
  * 設置錯誤信息
  * @access public
  * @param string $msg
  */
 public function set_error($msg) {
  if (! empty ( $msg ))
   $this->errors [] = $msg;
 }
 /**
  * 獲取錯誤信息
  * @access public
  * @param string $open
  * @param string $close
  * @return string
  */
 public function display_errors($open = '<p>', $close = '</p>') {
  $str = '';
  foreach ( $this->errors as $val ) {
   $str .= $open . $val . $close;
  }
  return $str;
 }
 /**
  * @access public
  * @param string $name
  * @param string $value
  * @return boolean
  */
 public function __set($name, $value) {
  if ($name == 'options' || $name == 'headers') {
   $this->{$name} = $value + $this->{$name};
  } else {
   $this->{$name} = $value;
  }
  return TRUE;
 }
 /**
  * 
  * @param string $name
  * @return mixed
  * @access public
  */
 public function __get($name) {
  return (isset ( $this->{$name} )) ? $this->{$name} : null;
 }
 /**
  * @return void
  * @access public
  */
 public function __destruct() {
  unset ( $this->size, $this->timeout, $this->callback, $this->options, $this->headers, $this->requests, $this->request_map, $this->errors );
 }
}
// END Curl Class
/* End of file curl.class.php */

希望本文所述對大家PHP程序設計有所幫助。