php脚本不会抛出异常

Question

我正在尝试使用异常验证我的 php 表单，但不知何故它不起作用。如果用户在“nameg”中输入任何非字符串的字符并且在“amountg”中输入任何非整数的字符，则应该抛出异常。在这种情况下是否应该使用异常:

if(!empty($_POST['nameg']) && !empty($_POST['amountg']))
{
    $user="rootdummy";
    $pass="password";
    $db="practice";
    $nameg=$_POST['nameg'];
    $amountg=$_POST['amountg'];

    try{
        if(!is_int($amountg) || !is_string($nameg)){
            throw new Exception("This is the exception message!");
        }
    }
    catch (Exception $e){
        $e->getMessage();
    }

    mysql_connect('localhost',$user,$pass) or die("Connection Failed!, " . mysql_error());
    $query="INSERT INTO practable (name,given) VALUES('$nameg',$amountg) ON DUPLICATE KEY UPDATE name='$nameg', given=IFNULL(given + $amountg,$amountg)";
    mysql_select_db($db) or die("Couldn't connect to Database, " . mysql_error());
    mysql_query($query) or die("Couldn't execute query! ". mysql_error());

    mysql_close() or die("Couldn't disconnect!");
    include("dbclient.php");
    echo "<p style='font-weight:bold;text-align:center;'>Information Added!</p>";
}

Answer 1

想必你想输出异常？做:

echo $e->getMessage();

编辑:为了回应您稍后关于脚本结束的评论，将 MySQL 查询放在 try block 中。

编辑 2: 更改验证以响应您的评论。

if(!empty($_POST['nameg']) && !empty($_POST['amountg']))
{
    $user="rootdummy";
    $pass="password";
    $db="practice";
    $nameg=$_POST['nameg'];
    $amountg=$_POST['amountg'];

    try{

        if(!ctype_numeric($amountg) || !ctype_alpha($nameg)){
            throw new Exception("This is the exception message!");
        }

      mysql_connect('localhost',$user,$pass) or die("Connection Failed!, " . mysql_error());
      $query="INSERT INTO practable (name,given) VALUES('$nameg',$amountg) ON DUPLICATE KEY UPDATE name='$nameg', given=IFNULL(given + $amountg,$amountg)";
      mysql_select_db($db) or die("Couldn't connect to Database, " . mysql_error());
      mysql_query($query) or die("Couldn't execute query! ". mysql_error());

      mysql_close() or die("Couldn't disconnect!");
      include("dbclient.php");
      echo "<p style='font-weight:bold;text-align:center;'>Information Added!</p>";

    }
    catch (Exception $e){
        echo $e->getMessage();
    }
}