php写入数据到CSV文件的方法

<?php
$row = 0;
ini_set('max_execution_time', 300);
$cate;$item;$value;$us;
$fp = fopen("torah1.csv", "w");
if (($handle = fopen("t.csv", "r")) !== false) {
  while (($data = fgetcsv($handle, 1000, ",")) !== false) {
    $num = count($data);
    $row++;
    for ($c=0; $c < $num; $c++) {
      if($c==0){   
      $us = $data[$c];
      }
      if($c==1){
      $item = explode(" ",$data[$c]);
      echo "<pre>";
      print_r($item);
      } elseif($c==2){
       $value=$data[$c];
      }
      elseif($c==3){
       $cate1 = $data[$c];
      }
      else{
      }
    } // end of for loop
    if($row > 1838)
    {
      exit;
    }
    fputcsv($fp, array($us,$item[0],$item[1],$item[2],$item[3]));
  }//end of while
 }// end of if
  fclose($handle);
  fclose($fp);
?>