PHP未声明的变量错误

时间:2014-04-08 23:37:13

标签: php

我的代码和表格:

<?php
include("includes/connect.php");
$content = "SELECT * FROM content where content_page='home'";
$result = mysql_query($content);
$row = mysql_fetch_array($result);
?>
<form method="post" action="admin_home.php">
Headline:</br>
<input type="text" name="content_title" value="<?php echo "$row[content_title]" ?>"></br>   </br>
Main content:</br>
<textarea type="text" class="txtinput" cols="55" rows="20" name="content_text"><?php echo   "$row[content_text]" ?></textarea></br></br>
<input type="submit" name="submit" value="Save changes">
</form>

按下“提交”按钮时我想要发生的代码:

<?php 

include("includes/connect.php");
if(isset($_POST['submit'])){ 

$order = "UPDATE content 
          SET content_title='$content_title', content_text='$content_text' WHERE content_page='home'";
mysql_query($order);

}

&GT;

我得到的错误:

Notice: Undefined variable: content_title in /Applications/XAMPP/xamppfiles/htdocs/templacreations/admin/admin_home.php on line 63

Notice: Undefined variable: content_text in /Applications/XAMPP/xamppfiles/htdocs/templacreations/admin/admin_home.php on line 63

第63行是我提交按钮代码的以下行:

SET content_title='$content_title', content_text='$content_text' WHERE 

这不是宣告它们吗?

1 个答案:

答案 0 :(得分:0)

看起来您正在寻找表单的POST值。

它们不包含在变量$content_title$content_text中。实际上,您的错误告诉您,您尚未为这些变量分配任何内容。

它们包含在$_POST数组中,就像提交的值一样。

<?php 

include("includes/connect.php");
if(isset($_POST['submit'])){ 
  //Sanitize data and assign value to variable 
  $content_title = mysql_real_escape_string($_POST['content_title']); 
  $content_text = mysql_real_escape_string($_POST['content_text']);

  $order = "UPDATE content 
            SET content_title='$content_title', content_text='$content_text' 
            WHERE content_page='home'";
  mysql_query($order);

}

?>