Question

嗨，大家好，我的第一天用PHP。我想这对你来说很简单。有人可以帮我在$ result_device []中显示我的数组$ result []的每个元素作为字符串吗？

<?php
  $mysqli = new mysqli("localhost", "root", "password", "db");      

    $sql = "SELECT erker, brunnen, stehlampe, computer, mediacenter FROM 
    devices";
    if (!$result = $mysqli->query($sql)) {
        echo "Query: " . $sql . "\n";
        echo "Errno: " . $mysqli->errno . "\n";
        echo "Error: " . $mysqli->error . "\n";
        exit;
    }

  $result = $result->fetch_row();
  $i = 0;
  foreach ($result as list ($result_device)) {
    if ($result_device[i]==0){
      $result_device[i] = "ausgeschaltet";
      }
    elseif ($result_device[i]==1){
      $result_device[i] = "eingeschaltet";
      }
      $i++;

  }
  echo $result_device[0];
  echo $result_device[1];
  echo $result_device[2];
  echo $result_device[3];
  echo $result_device[4];


  $result->close();
  $mysqli->close();
  ?>

非常感谢你！

Answer 1

您需要改进以下代码： -

<?php
$mysqli = new mysqli("localhost", "root", "password", "db");

if ($mysqli->connect_errno) {
    printf("Connect failed: %s\n", $mysqli->connect_error);
    exit();
}

$result_device = [];
if ($result = $mysqli->query("SELECT erker, brunnen, stehlampe, computer, mediacenter FROM devices")) {
    while ($row = $result->fetch_row()) {
       print_r($row); 
       // Based on oputput modify condition and assign values to $result_device
    }

    $result->close();
}

$mysqli->close();
?>

php：将数组的每个元素显示为字符串

1 个答案: