In PHP, Curl loops to request multiple URLs and multithreading to request multiple URLs

PHP in a loop to request multiple URLs and multithreading to request multiple URLs method

The first type: Circular request

$SR =array (Url_1,url_2,url_3), foreach ($sr as $k = = $v) {$curlPost = $v. '? f= incoming parameters '; $ch = Curl_init ($curlPost); curl_ Setopt ($ch, Curlopt_returntransfer, true); Get Data return   curl_setopt ($ch, Curlopt_binarytransfer, true);//Get Data back when Curlopt_returntransfer is enabled   $data = Curl_ EXEC ($ch); Echo $k. ' # #: '. $data. '
';

}

Curl_close ($ch);

Second multithreaded request

$SR =array (Url_1,url_2,url_3);

$MH = Curl_multi_init ();     foreach ($sr as $i = = $url) {      $curlPost = $url. '? F=%2fpipefile%2fskincss%2fskincss_1356490012_1.zip%40%2fskincss%2fimages%2fskincss_1356490012_1.jpg ';      $conn [$i]=curl_init ($curlPost);      curl_setopt ($conn [$i],curlopt_returntransfer,1);      Curl_multi_add_handle ($MH, $conn [$i]);     }      do {      $MRC = curl_multi_exec ($MH, $active);     } while ($MRC = = curlm_call_multi_perform);     while ($active and $MRC = = CURLM_OK) {      if (Curl_multi_select ($MH)! =-1) {do       {        $MRC = curl_multi_exec ($MH, $active);       } while ($MRC = = Curlm_call_multi_perform);}     }      foreach ($sr as $i = + $url) {      $res [$i]=curl_multi_getcontent ($conn [$i]);      Curl_close ($conn [$i]);     }  Var_dump ($res);

After a simple test, we found that at the same time request 4 different URLs, the processing speed of the loop seems faster than multi-threaded, the problem remains to be verified

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