基于PHP CURL用法的深入分析

<?php
header('context-type:text/html;charset:gb2312;');
$urls = array(
 'http://www.baidu.com/',
 'http://www.pconline.com.cn/',
 'http://www.163.com/'
);
$options = array(
 curlopt_returntransfer=>1,
 curlopt_followlocation=>1, 
 curlopt_header => false, 
 curlopt_httpheader => array(
  'accept'=>' text/html, application/xhtml+xml,',
  'accept-encoding'=>' gzip, deflate',
  'accept-language'=>' zh-cn',
  'connection'=>' keep-alive', 
  'user-agent'=>' mozilla/5.0 (compatible; msie 9.0; windows nt 6.1; trident/5.0)',
 ),
);
function curlmultirequest($urls,$options=array()){
 $ch = array();
 $results = array();
 $mh = curl_multi_init();
 foreach($urls as $key=>$val){
  $ch[$key] = curl_init();
  if($options){
   curl_setopt_array($ch[$key],$options);
  }  
  curl_setopt($ch[$key],curlopt_url,$val);
  curl_multi_add_handle($mh,$ch[$key]);
 }

 $running = null;
 do{
  curl_multi_exec($mh,$running);
 }while($running>0); 

 foreach($ch as $key=>$val){
  //$results[$key] = iconv('gb2312','utf-8',curl_multi_getcontent($val));
  $results[$key] = curl_multi_getcontent($val);
  curl_multi_remove_handle($mh,$val);
  curl_close($val);
 } 
 curl_multi_close($mh); 
 return $results;
}
$results = curlmultirequest($urls,$options);
print_r($results);
?>