php - 数组键值在分配后立即被清空/归零

Question

我有一个使用 PHP 设置页面输入字段值的表单，例如:

// create and fill inputVarsArr with keys that have empty vals
$troubleInsertInputVarsArr = array_fill_keys(array('status', 'discoverDate', 'resolveDate', 'ticketIssued', 'eqptSystem', 'alarmCode', 'troubleDescription', 'troubleshootingSteps', 'resolveActivities', 'notes'), '');

if (isset ($_POST['insert'])) { // update DB site details 
    foreach ($troubleInsertInputVarsArr as $key => $val) {
        if ($key !== 'discoverDate' && $key !== 'resolveDate') { //deal with dates separately below
            $val = $_SESSION[$key] = sanitizeText($_POST[$key]);
            echo '<br>(' . __LINE__ . ') ' . $key . ': ' . $val . ' ';
        } // close IF ; line 47 echo
    } // close FOREACH

    foreach ($troubleInsertInputVarsArr as $key => $val) {
        echo '<br>(' . __LINE__ . ') ' . $key . ': ' . $val . ' ';
    } // close FOREACH // line 52 echo
}

if 条件嵌套在 foreach 循环中的输入变量 echo'd(第 47 行的 echo')按我的预期打印出来(输入到表单中的值页面的输入字段):

(47) status: Outstanding
(47) ticketIssued: no
(47) eqptSystem: Tower Lights
(47) alarmCode: Visual
(47) troubleDescription: - no description yet -
(47) troubleshootingSteps: - no steps yet taken -
(47) resolveActivities: - no activities yet decided -
(47) notes: - no notes -

但随后在紧随其后的 foreach 循环中回显相同数组中的相同 key-val 对(在第 52 行回显)，没有任何进一步的变量处理已经发生，为每个键打印出空值:

(52) status:
(52) discoverDate:
(52) resolveDate:
(52) ticketIssued:
(52) eqptSystem:
(52) alarmCode:
(52) troubleDescription:
(52) troubleshootingSteps:
(52) resolveActivities:
(52) notes: 

不知何故，数组的键值在分配后立即被归零，我不知道如何或为什么。任何人都可以看出为什么会发生这种情况的明显原因吗？

Answer 1

您永远不会为 $troubleInsertInputVarsArr 分配值，只能分配键。你可以试试这个:

   foreach ( $troubleInsertInputVarsArr as $key => $val ) {
      $troubleInsertInputVarsArr[$key] = sanitizeText( $_POST[ $key ]); 
      if ( $key !== 'discoverDate' && $key !== 'resolveDate' ) { 
          $val = $_SESSION[ $key ] = sanitizeText( $_POST[ $key ] );
          echo '<br>(' . __LINE__ . ') ' . $key . ': ' . $val . ' ';
      } 
    }