Question

我在上传csv时遇到问题，首先，我想在将重复数据或列或行输入数据库之前检查它们。我有2列/行，我想在将其插入表中之前检查两列或行上的所有数据。

注意：如果在所有两列或两行中都发现重复项，它将抛出并错误或回显该重复值，并且不会继续执行插入功能。

$stored = [];
$handle2 = fopen($_FILES["charge_file"]["tmp_name"],"r");
while(($data1 = fgetcsv($handle2,1000,",")) !==false){

    $charge_emp = trim($data1[0]);
    $charge_amount = trim($data1[2]);



    // this is the function on checking the duplicates
    if (in_array($data1[0], $stored)) { continue;}
    $stored[] = $data1[0];

    showDups($stored);


    // this is my insert function
    charges_group_entry($charge_emp,$charge_amount);

}

fclose($handle);

function showDups($array)
{
    $array_temp = array();

    foreach($array as $val)
    {
        if (!in_array($val, $array_temp))
        {
        $array_temp[] = $val;
        }
        else
        {
        echo 'duplicate = ' . $val . '<br />';
        }
    }
}

Answer 1

不确定“复制在两列上找到的数据”是什么意思，因此这是两种解决方案合二为一：

$stored_emp = [];
$stored_amount = [];
$stored_pair = [];
$global_duplicate=false;
$handle2 = fopen($_FILES["charge_file"]["tmp_name"],"r");
while(($data1 = fgetcsv($handle2,1000,",")) !==false){

    $charge_emp = trim($data1[0]);
    $charge_amount = trim($data1[2]);
    $pair = $charge_emp.' '.$charge_amount;

    // this is the code for checking the duplicates separately
    $duplicate=false;
    if (in_array($charge_emp, $stored_emp)) {
      echo 'duplicate emp = ' . $charge_emp . '<br />';
      $duplicate=true;
    }
    if (in_array($charge_amount, $stored_amount)) {
      echo 'duplicate amount = ' . $charge_amount . '<br />';
      $duplicate=true;
    }
    if($duplicate){
      $global_duplicate=true;
      continue;
    }
    $stored_emp[] = $charge_emp;
    $stored_amount[] = $charge_amount;

    //use this instead if you want to check pair duplicates
    if (in_array($pair, $stored_pair)) {
      echo 'duplicate pair = ' . $pair . '<br />';
      $global_duplicate=true;
      continue;
    }
    $stored_pair[] = $pair;
}
//only insert values if no duplicates found
if(!$global_duplicate){
  foreach($stored_emp as $nrow=>$emp){
    charges_group_entry($emp,$stored_amount[$nrow]);
  }
}

fclose($handle);

在任何情况下，都不需要showDups（因为已经过滤了$stored。

如何在插入表之前检查csv文件是否具有重复值

1 个答案: