Question

通过使用html表单，我想从sql-database读出数据并在html表中显示它们。这很好用！现在，我希望在sql-select-query之后减少表中的列数。

$field = mysqli_fetch_fields($result)返回列名，var_dunp($field)返回以下结果：

array（11）{[0] =＆gt; object（stdClass）＃3（13）{[＆＃34; name＆＃34;] =＆gt; string（2）＆＃34; id＆＃34; [＆＃34; ORGNAME＆＃34;] =＆GT; string（2）＆＃34; id＆＃34; [＆＃34;表＆＃34;] =＆GT; string（8）＆＃34; adressen＆＃34; [＆＃34; orgtable＆＃34;] =＆GT; string（8）＆＃34; adressen＆＃34; [＆＃34; DEF＆＃34;] =＆GT; string（0）＆＃34;＆＃34; [＆＃34;分贝＆＃34;] =＆GT; string（4）＆＃34; team＆＃34; [＆＃34;目录＆＃34;] =＆GT; string（3）＆＃34; def＆＃34; [＆＃34; MAX_LENGTH＆＃34;] =＆GT; int（1）[＆＃34; length＆＃34;] =＆gt; int（11）[＆＃34; charsetnr＆＃34;] =＆gt; int（63）[＆＃34; flags＆＃34;] =＆gt; int（49667）[＆＃34; type＆＃34;] =＆gt; int（3）[＆＃34;小数＆＃34;] =＆gt; int（0）} [1] =＆gt; object（stdClass）＃4（13）{[＆＃34; name＆＃34;] =＆gt; string（7）＆＃34; Vorname＆＃34; [＆＃34; ORGNAME＆＃34;] =＆GT; string（7）＆＃34; Vorname＆＃34; [＆＃34;表＆＃34;] =＆GT; string（8）＆＃34; adressen＆＃34; [＆＃34; orgtable＆＃34;] =＆GT; string（8）＆＃34; adressen＆＃34; [＆＃34; DEF＆＃34;] =＆GT; string（0）＆＃34;＆＃34; [＆＃34;分贝＆＃34;] =＆GT; string（4）＆＃34; team＆＃34; [＆＃34;目录＆＃34;] =＆GT; string（3）＆＃34; def＆＃34; [＆＃34; MAX_LENGTH＆＃34;] =＆GT; int（9）[＆＃34; length＆＃34;] =＆gt; int（60）[＆＃34; charsetnr＆＃34;] =＆gt; int（33）[＆＃34; flags＆＃34;] =＆gt; int（0）[＆＃34; type＆＃34;] =＆gt; int（253）[＆＃34;小数＆＃34;] =＆gt; int（0）} [2] =＆gt; object（stdClass）＃5（13）{[＆＃34; name＆＃34;] =＆gt; string（4）＆＃34; Name＆＃34; [＆＃34; ORGNAME＆＃34;] =＆GT; string（4）＆＃34; Name＆＃34; [＆＃34;表＆＃34;] =＆GT; string（8）＆＃34; adressen＆＃34; [＆＃34; orgtable＆＃34;] =＆GT; string（8）＆＃34; adressen＆＃34; [＆＃34; DEF＆＃34;] =＆GT; string（0）＆＃34;＆＃34; [＆＃34;分贝＆＃34;] =＆GT; string（4）＆＃34; team＆＃34; [＆＃34;目录＆＃34;] =＆GT; string（3）＆＃34; def＆＃34; [＆＃34; MAX_LENGTH＆＃34;] =＆GT; int（14）[＆＃34; length＆＃34;] =＆gt; int（60）[＆＃34; charsetnr＆＃34;] =＆gt; int（33）[＆＃34; flags＆＃34;] =＆gt; int（0）[＆＃34; type＆＃34;] =＆gt; int（253）[＆＃34;小数＆＃34;] =＆gt; int（0）} [3] =＆gt; object（stdClass）＃6（13）{[＆＃34; name＆＃34;] =＆gt; string（3）＆＃34; Str＆＃34; [＆＃34; ORGNAME＆＃34;] =＆GT; string（3）＆＃34; Str＆＃34; [＆＃34;表＆＃34;] =＆GT; string（8）＆＃34; adressen＆＃34; [＆＃34; orgtable＆＃34;] =＆GT; string（8）＆＃34; adressen＆＃34; [＆＃34; DEF＆＃34;] =＆GT; string（0）＆＃34;＆＃34; [＆＃34;分贝＆＃34;] =＆GT; string（4）＆＃34; team＆＃34; [＆＃34;目录＆＃34;] =＆GT; string（3）＆＃34; def＆＃34; [＆＃34; MAX_LENGTH＆＃34;] =＆GT; int（22）[＆＃34; length＆＃34;] =＆gt; int（60）[＆＃34; charsetnr＆＃34;] =＆gt; int（33）[＆＃34; flags＆＃34;] =＆gt; int（0）[＆＃34; type＆＃34;] =＆gt; int（253）[＆＃34;小数＆＃34;] =＆gt; int（0）} [4] =＆gt; object（stdClass）＃7（13）{[＆＃34; name＆＃34;] =＆gt; string（3）＆＃34; PLZ＆＃34; [＆＃34; ORGNAME＆＃34;] =＆GT; string（3）＆＃34; PLZ＆＃34; [＆＃34;表＆＃34;] =＆GT; string（8）＆＃34; adressen＆＃34; [＆＃34; orgtable＆＃34;] =＆GT; string（8）＆＃34; adressen＆＃34; [＆＃34; DEF＆＃34;] =＆GT; string（0）＆＃34;＆＃34; [＆＃34;分贝＆＃34;] =＆GT; string（4）＆＃34; team＆＃34; [＆＃34;目录＆＃34;] =＆GT; string（3）＆＃34; def＆＃34; [＆＃34; MAX_LENGTH＆＃34;] =＆GT; int（4）[＆＃34; length＆＃34;] =＆gt; int（15）[＆＃34; charsetnr＆＃34;] =＆gt; int（33）[＆＃34; flags＆＃34;] =＆gt; int（0）[＆＃34; type＆＃34;] =＆gt; int（254）[＆＃34;小数＆＃34;] =＆gt; int（0）} [5] =＆gt; object（stdClass）＃8（13）{[＆＃34; name＆＃34;] =＆gt; string（3）＆＃34; Ort＆＃34; [＆＃34; ORGNAME＆＃34;] =＆GT; string（3）＆＃34; Ort＆＃34; [＆＃34;表＆＃34;] =＆GT; string（8）＆＃34; adressen＆＃34; [＆＃34; orgtable＆＃34;] =＆GT; string（8）＆＃34; adressen＆＃34; [＆＃34; DEF＆＃34;] =＆GT; string（0）＆＃34;＆＃34; [＆＃34;分贝＆＃34;] =＆GT; string（4）＆＃34; team＆＃34; [＆＃34;目录＆＃34;] =＆GT; string（3）＆＃34; def＆＃34; [＆＃34; MAX_LENGTH＆＃34;] =＆GT; int（10）[＆＃34; length＆＃34;] =＆gt; int（90）[＆＃34; charsetnr＆＃34;] =＆gt; int（33）[＆＃34; flags＆＃34;] =＆gt; int（0）[＆＃34; type＆＃34;] =＆gt; int（253）[＆＃34;小数＆＃34;] =＆gt; int（0）} [6] =＆gt; object（stdClass）＃9（13）{[＆＃34; name＆＃34;] =＆gt; string（3）＆＃34; Tel＆＃34; [＆＃34; ORGNAME＆＃34;] =＆GT; string（3）＆＃34; Tel＆＃34; [＆＃34;表＆＃34;] =＆GT; string（8）＆＃34; adressen＆＃34; [＆＃34; orgtable＆＃34;] =＆GT; string（8）＆＃34; adressen＆＃34; [＆＃34; DEF＆＃34;] =＆GT; string（0）＆＃34;＆＃34; [＆＃34;分贝＆＃34;] =＆GT; string（4）＆＃34; team＆＃34; [＆＃34;目录＆＃34;] =＆GT; string（3）＆＃34; def＆＃34; [＆＃34; MAX_LENGTH＆＃34;] =＆GT; int（11）[＆＃34; length＆＃34;] =＆gt; int（75）[＆＃34; charsetnr＆＃34;] =＆gt; int（33）[＆＃34; flags＆＃34;] =＆gt; int（0）[＆＃34; type＆＃34;] =＆gt; int（253）[＆＃34;小数＆＃34;] =＆gt; int（0）} [7] =＆gt; object（stdClass）＃10（13）{[＆＃34; name＆＃34;] =＆gt;字符串（5）＆＃34;电子邮件＆＃34; [＆＃34; ORGNAME＆＃34;] =＆GT;字符串（5）＆＃34;电子邮件＆＃34; [＆＃34;表＆＃34;] =＆GT; string（8）＆＃34; adressen＆＃34; [＆＃34; orgtable＆＃34;] =＆GT; string（8）＆＃34; adressen＆＃34; [＆＃34; DEF＆＃34;] =＆GT; string（0）＆＃34;＆＃34; [＆＃34;分贝＆＃34;] =＆GT; string（4）＆＃34; team＆＃34; [＆＃34;目录＆＃34;] =＆GT; string（3）＆＃34; def＆＃34; [＆＃34; MAX_LENGTH＆＃34;] =＆GT; int（20）[＆＃34; length＆＃34;] =＆gt; int（90）[＆＃34; charsetnr＆＃34;] =＆gt; int（33）[＆＃34; flags＆＃34;] =＆gt; int（0）[＆＃34; type＆＃34;] =＆gt; int（253）[＆＃34;小数＆＃34;] =＆gt; int（0）} [8] =＆gt; object（stdClass）＃11（13）{[＆＃34; name＆＃34;] =＆gt;字符串（3）＆＃34; WWW＆＃34; [＆＃34; ORGNAME＆＃34;] =＆GT;字符串（3）＆＃34; WWW＆＃34; [＆＃34;表＆＃34;] =＆GT; string（8）＆＃34; adressen＆＃34; [＆＃34; orgtable＆＃34;] =＆GT; string（8）＆＃34; adressen＆＃34; [＆＃34; DEF＆＃34;] =＆GT; string（0）＆＃34;＆＃34; [＆＃34;分贝＆＃34;] =＆GT; string（4）＆＃34; team＆＃34; [＆＃34;目录＆＃34;] =＆GT; string（3）＆＃34; def＆＃34; [＆＃34; MAX_LENGTH＆＃34;] =＆GT; int（17）[＆＃34; length＆＃34;] =＆gt; int（90）[＆＃34; charsetnr＆＃34;] =＆gt; int（33）[＆＃34; flags＆＃34;] =＆gt; int（0）[＆＃34; type＆＃34;] =＆gt; int（253）[＆＃34;小数＆＃34;] =＆gt; int（0）} [9] =＆gt; object（stdClass）＃12（13）{[＆＃34; name＆＃34;] =＆gt;字符串（7）＆＃34; Notizen＆＃34; [＆＃34; ORGNAME＆＃34;] =＆GT;字符串（7）＆＃34; Notizen＆＃34; [＆＃34;表＆＃34;] =＆GT; string（8）＆＃34; adressen＆＃34; [＆＃34; orgtable＆＃34;] =＆GT; string（8）＆＃34; adressen＆＃34; [＆＃34; DEF＆＃34;] =＆GT; string（0）＆＃34;＆＃34; [＆＃34;分贝＆＃34;] =＆GT; string（4）＆＃34; team＆＃34; [＆＃34;目录＆＃34;] =＆GT; string（3）＆＃34; def＆＃34; [＆＃34; MAX_LENGTH＆＃34;] =＆GT; int（13）[＆＃34; length＆＃34;] =＆gt; int（196605）[＆＃34; charsetnr＆＃34;] =＆gt; int（33）[＆＃34; flags＆＃34;] =＆gt; int（16）[＆＃34; type＆＃34;] =＆gt; int（252）[＆＃34;小数＆＃34;] =＆gt; int（0）} [10] =＆gt; object（stdClass）＃13（13）{[＆＃34; name＆＃34;] =＆gt; string（10）＆＃34; Geburtstag＆＃34; [＆＃34; ORGNAME＆＃34;] =＆GT; string（10）＆＃34; Geburtstag＆＃34; [＆＃34;表＆＃34;] =＆GT; string（8）＆＃34; adressen＆＃34; [＆＃34; orgtable＆＃34;] =＆GT; string（8）＆＃34; adressen＆＃34; [＆＃34; DEF＆＃34;] =＆GT; string（0）＆＃34;＆＃34; [＆＃34;分贝＆＃34;] =＆GT; string（4）＆＃34; team＆＃34; [＆＃34;目录＆＃34;] =＆GT; string（3）＆＃34; def＆＃34; [＆＃34; MAX_LENGTH＆＃34;] =＆GT; int（10）[＆＃34; length＆＃34;] =＆gt; int（30）[＆＃34; charsetnr＆＃34;] =＆gt; int（33）[＆＃34; flags＆＃34;] =＆gt; int（0）[＆＃34; type＆＃34;] =＆gt; int（253）[＆＃34;小数＆＃34;] =＆gt; int（0）}}

由于这是一个数组，我现在想要从这个数组中删除所选元素，并尝试使用：

    // Initilize what to delete
        $delete_val = array('PLZ');
    //     Search for the array key and unset
           foreach($delete_val as $key){
              $keyToDelete = array_search($key, $field);
              unset($field[$keyToDelete]);
           }

或

      $toremove = "PLZ";
      $field = array_flip($field);
      unset($field[$toremove]);
      $field = array_flip($field);

但是，两种方式都不起作用。显然，使用这种方法在数组中找不到我想要删除的元素。

在第二步中，我必须修改while循环，以便在相应的列中显示正确的值：

      $nr = 1;
      while ($row = mysqli_fetch_array($result)) {
      echo "<td>" . $nr . "</td>";
        for ($k=0; $k<$numcols; $k++) {    
        echo "<td>" . $row[$k] . "</td>"; //Prints the data
        }
      echo "</tr>";
      $nr = $nr + 1;
      }     // ende of while-loop

如果有人能帮我解决这个问题，我将不胜感激！

Answer 1

那不是普通的数组，它是一个对象数组，这是mysqli_fetch_fields()函数所期望的，所以你的删除逻辑赢了＆＃39;以那种方式工作。你的代码应该是这样的：

（假设std::thread是您要在此处删除的列）

PLZ

如何删除sql-database-array

1 个答案: