解析php多线程下载远程多个文件

复制代码 代码如下:

  function remote($urls, $name = '', $path = '', $dir = './images/') {

  if (!is_array($urls) or count($urls) == 0) {

  return false;

  }

  dmkdir($dir);

  $curl = $text = array();

  foreach($urls as $k => $v) {

  if (!empty($v) && preg_match("~^http~i", $v)) {

  $nurl[$k] = trim(str_replace(' ', "%20", $v));

  $curl[$k] = curl_init($nurl[$k]);

  curl_setopt($curl[$k], CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4 );

  curl_setopt($curl[$k], CURLOPT_RETURNTRANSFER, 1);

  curl_setopt($curl[$k], CURLOPT_HEADER, 0);

  curl_setopt($curl[$k], CURLOPT_CONNECTTIMEOUT, 20);

  if(!isset($handle)){

  $handle = curl_multi_init();

  }

  curl_multi_add_handle($handle, $curl[$k]);

  }

  continue ;

  }

  $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]) == "") {

  if ($k == 0) {

  $fname[$k] = strtolower($name . '.' . pathinfo($urls[$k], PATHINFO_EXTENSION));

  } else {

  $fname[$k] = strtolower($name . '_' . $k . '.' . pathinfo($urls[$k], PATHINFO_EXTENSION));

  }

  $text[$k] = (string) curl_multi_getcontent($curl[$k]);

  $filedir[$k] = $dir.'/' . $fname[$k];

  if (file_put_contents($filedir[$k], $text[$k])) {

  $filepath[$k] = $path . $fname[$k];

  }

  }

  curl_multi_remove_handle($handle, $curl[$k]);

  curl_close($curl[$k]);

  }

  curl_multi_close($handle);

  return $filepath;

  }