PHP Multi-Process Lab notes

<?phpfunction totalcount () {   $pdo  = pdo_mysql::getinstance ();   $params  = [' where '  => [' id '  => [' >= '  => 672600],]];  $ result =  $pdo->count (' crawl_receive_task ',  $params);   $pdo  = null;   return  $result;} Function selectcountlist () {   $pdo  = pdo_mysql::getinstance ();   $conditions  = array (       ' Fields '  =>  ' Id,url,info_path ',        ' where '  => [' id '  => [' >= '  => 672600],]   );   $result  =  $pdo->getall (' crawl_receive_task ',  $conditions);    $pdo  = null;  return  $result;} Function update ($data,  $id) {   $pdo  = pdo_mysql::getinstance ();   $where  = array (       ' where '  => array (           ' id ')  =>  $id       )   );   $result  =  $pdo- >update (' crawl_receive_task ',  $where,  $data);   $pdo  = null;  return   $result;} $t  =  totalcount (); $list  =  selectcountlist (); $start =0; $threads  = 4; while ($start < $t) {  if ($start  ==  $t)  break;  for ($i = $start; $i < $start +$ threads, $i + +) {     $pids [$i] = pcntl_fork ();     if ($pids [$i])  {      echo  $pids [$i]. " Parent ". PHP_EOL;&NBSP;&NBSP;&NBSP;&NBSP;}&NBSP;&NBSP;&NBSP;&NBSP;ELSE&NBSP;IF (! $pids [$i])  {       echo getmypid (). " --". $pids [$i]." --child ". php_eol;       $result  = curl::request (' GET ', $list [$i][' Info_path ');       update ([' Add_time ' =>date (' y-m-d h:i:s '), ' test ' = > $list [$i] [' ID ']], $list [$i] [' ID ']);      echo  $result. " -----------------". Php_eol;      exit ();     }    usleep (100 );   }  for ($i = $start; $i < $start + $threads; $i + +) {    pcntl_waitpid ($ pids[$i],  $status,  wuntraced);     $status  = pcntl_wexitstatus ($status) ;    echo  "--------$status  finished--------". php_eol;  }   $start + = $threads;}

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| |-grep,18003 PHP

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PHP Multi-Process Lab notes