我有一个名为 lynked_v1 的表,MySQL中的一个名为 probability_single_free
的列 +----------------------------------+
| id | probability_single_free |
| ---------------------------------|
| 0 | 100.00 |
| 1 | 100.00 |
| 2 | 100.00 |
| 3 | 100.00 |
| 4 | 100.00 |
| 5 | 100.00 |
| 6 | 100.00 |
| 7 | 100.00 |
+----------------------------------+
我正在尝试使用以下命令回显每一行:
<?php
error_reporting(-1);
ini_set('display_errors', true);
require_once ('/var/www/html/MySQL/mysqli_connect.php');
echo "Connected successfully";
$query = "SELECT probability_single_free FROM lynked_v1";
$response = @mysqli_query($dbc, $query);
while($row = mysqli_fetch_array($response)) {
echo $row[0];
echo $row[1];
echo $row[2];
echo $row[3];
echo $row[4];
echo $row[5];
echo $row[6];
echo $row[7];
}
?>
$ row [0]在屏幕上打印好了。但是我在其余行中遇到以下错误:
Notice: Undefined offset: 1 in /var/www/html/index.php on line 56
Notice: Undefined offset: 2 in /var/www/html/index.php on line 57
Notice: Undefined offset: 3 in /var/www/html/index.php on line 58
Notice: Undefined offset: 4 in /var/www/html/index.php on line 59
Notice: Undefined offset: 5 in /var/www/html/index.php on line 60
Notice: Undefined offset: 6 in /var/www/html/index.php on line 61
Notice: Undefined offset: 7 in /var/www/html/index.php on line 62
如何单独打印每一行?
答案 0 :(得分:0)
使用此代码:
<?php
error_reporting(-1);
ini_set('display_errors', true);
require_once ('/var/www/html/MySQL/mysqli_connect.php');
echo "Connected successfully";
$query = "SELECT probability_single_free FROM lynked_v1";
$response = @mysqli_query($dbc, $query);
while($row = mysqli_fetch_array($response)) {
echo $row["probability_single_free"];
}
?>
它会像魅力一样工作)
答案 1 :(得分:0)
你误解了while($row = mysqli_fetch_array($response))
是如何运作的。基本上,这将逐行循环遍历所有数据库结果,并且每次将变量放入名为$row
的数组中。
结果行中的每一列都是键控数组中的值。如果您选择的只有一列(如您的示例所示),则每个循环中仅使用$row[0]
。
当数据库的行循环播放时,您只需在循环内echo $row[0]
打印所有值。
while($row = mysqli_fetch_array($response)) {
echo $row[0];
}