Question

尝试创建按钮，rule作为按钮上的名称，desc作为传递的值。但这只是将$name放在按钮上。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
 }
?>

Answer 1

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

你需要在php

中写出来

Answer 2

您必须echo PHP变量才能在HTML元素中获取其值。

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

Answer 3

你需要在循环时回显结果。

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

完整代码：

<?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 } ?>

或者在php标签中回显它，而不是关闭并再次打开它们：

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

Answer 4

PHP适用于PHP。使用PHP code block.

包装您的函数和名称变量

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

Answer 5

您已经忘记在php变量周围添加php标记了。

<?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
 }
?>

Answer 6

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
}
?>

如果您启用了short_tags，那就是这样。否则

<?php echo $desc; ?>

和

<?php echo $name; ?>

会起作用

Answer 7

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
 }
?>

问题是，您没有在HTML中回显变量（您的变量未被解释器解析）

Answer 8

<?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 }?>

Answer 9

注意：如果你想在html中使用php代码那么你应该总是使用php标签

<?php 
// Write php code here
?>

这就是为什么你应该替换下面这行

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

与

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

，第二种方法是在php标签内写入html

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

在php while循环中保存值

9 个答案: