如何在php中为两个不同的帖子使用isset方法？，
[英]How can I use isset method in php for two different posts?,
问题描述
I have two issets in one php file but it keeps on taking one of the posts only. 
我在一个php文件中有两个isset，但是它只保留其中一个帖子。 So it is one or another! 所以是一个或另一个！ Here is the php part: 这是php部分：
<?php
session_start();
include_once'config/connect.php'; //database connection
if(isset($_POST['add'])) {
$add = mysql_query("UPDATE venue SET location='".$_POST['add']."'
WHERE vid = (select vid from user_venue where id = (select user_id from iangadot_user
where username='".$_SESSION['username_profile']."' ))");
}
if(isset($_POST['webb'])) {
$webb = mysql_query("UPDATE venue SET web='".$_POST['webb']."'
WHERE vid = (select vid from user_venue where id = (select user_id from iangadot_user
where username='".$_SESSION['username_profile']."' ))");
}
?>
Html file: HTML文件：
<!DOCTYPE html>
<html>
<body>
<form method="POST">
<p>Address:</p> <input class = "field" name="add" placeholder= "<?php
if(isset($_SESSION['address'])) { echo $_SESSION['address']; } ?>" type="text" >
<input class = "button" type = "submit" Value = "Save"><br>
<p>Website:</p> <input class = "field" name= "webb" placeholder = "<?php
if(isset($_SESSION['website'])) { echo $_SESSION['website']; } ?>" type="text">
</form>
</body>
</html>
2 个解决方案
解决方案1
1 已采纳 2014-01-07 18:19:17
A text input will always report a value in $_POST , possibly an empty string. 文本输入将始终报告$_POST的值，可能为空字符串。
Conceptually, you allow the user to add both values, so it's up to you to prioritize one over the other or report an error in case both are filled. 从概念上讲，您允许用户将两个值相加，因此由您决定优先级高于另一个值或在两个值均被填充的情况下报告错误。
Now to detect automatically which one was filled, you could simply test the value of the $_POST data. 现在，要自动检测填充了哪一个，您只需测试$_POST数据的值即可。
if ($_POST['add'] != "" && $_POST['web'] != "") {
error ("make up your mind!");
}
if ($_POST['add'] != "") { ....
if ($_POST['web'] != "") { ....
解决方案2
0 2014-01-07 18:17:20
add 加
or die(mysql_error())
to the end of your query statements. 到查询语句的末尾。 Chances are one of the queries has a syntax error. 查询之一可能是语法错误。
Also, you really should be passing POST variables through at least mysql_real_escape_string() Rather than inserting directly into your database. 另外，您实际上应该至少通过mysql_real_escape_string（）传递POST变量，而不是直接插入数据库中。
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