在php while循环中保存值

尝试创建按钮，按钮上的名称为

规则

，传递的值为

desc

。但这只是在按钮上添加

$name

。我做错了什么

<?php    
$result = mysqli_query($con,"SELECT * FROM db_Rules");
while($row = mysqli_fetch_array($result)) {
 $desc = $row['desc'];
 $name = $row['rule'];
?>
      <button onclick="myFunction($desc)">$name</button>
<br>
<?php
 }
?>

$name

您必须
回显PHP变量，以便在HTML元素中获取其值

 <button onclick="myFunction(<?php echo $desc;?>)"><?php echo $name;?></button>

您需要在循环时回显结果

<button onclick="myFunction(<?php echo $desc; ?>)"><?php echo $name; ?></button>

PHP是为PHP设计的。用
PHP代码块包装函数和name变量。

您忘了在php变量周围放置php标记

<?php    
$result = mysqli_query($con,"SELECT * FROM db_Rules");
while($row = mysqli_fetch_array($result)) {
 $desc = $row['desc'];
 $name = $row['rule'];
?>
      <button onclick="myFunction(<?php echo $desc;?>)"><?php echo $name;?></button>
<br>
<?php
 }
?>


你没有回应任何东西，只是HTML

<?php    
$result = mysqli_query($con,"SELECT * FROM db_Rules");
while($row = mysqli_fetch_array($result)) {
$desc = $row['desc'];
$name = $row['rule'];
?>
<button onclick="myFunction(<?=$desc?>)"><?=$name?></button>
<br>
<?php
}
?>


试试这个：

<?php    
$result = mysqli_query($con,"SELECT * FROM db_Rules");
while($row = mysqli_fetch_array($result)) {
 $desc = $row['desc'];
 $name = $row['rule'];
?>
  <button onclick="myFunction(<?= $desc?>)"><?= $name?></button>
<br>
<?php
 }
?>



注意：如果您想在html中使用php代码，那么应该始终使用php标记

<?php 
// Write php code here
?>



这就是为什么你应该在下面一行替换这个

<button onclick="myFunction($desc)">$name</button>

$name

与

使用PHP代码块并回显变量不要忘记
在变量后面。即使它在这种情况下有效，这也是一种良好的做法
<?php echo $desc; ?> 

<?php echo $name; ?> 

<?php    
$result = mysqli_query($con,"SELECT * FROM db_Rules");
while($row = mysqli_fetch_array($result)) {
 $desc = $row['desc'];
 $name = $row['rule'];
?>
  <button onclick="myFunction(<?= $desc?>)"><?= $name?></button>
<br>
<?php
 }
?>

<?php    
$result = mysqli_query($con,"SELECT * FROM db_Rules");
while($row = mysqli_fetch_array($result)) {
 $desc = $row['desc'];
 $name = $row['rule'];
?>

  <button onclick="myFunction('<?php echo mysql_real_escape_string($desc)?>')"><?php echo $name;?></button>  
  <br />

<?php }?>

<?php 
// Write php code here
?>

<button onclick="myFunction($desc)">$name</button>

<button onclick="myFunction(<?php echo $desc; ?>)"><?php echo $name; ?></button>

echo '<button onclick="myFunction('.$desc.')">'.$name.'</button>';