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PHP电子邮件验证(filter_validate_email)不起作用

[英]php email validation (filter_validate_email) Not Working

我知道对此有很多问题,但是我似乎无法选择编码错误。 我知道这很简单,但我看不到。

我必须创建一个表单,提交该表单时,数据将被输入到MySQL数据库中,但是该数据需要首先进行验证。 我对此有2个问题,第一个是我的电子邮件验证无法使用: (filter_var($email, filter_validate_email))

问题是,无论电子邮件是否有效,我提交表单时都将返回true。 如果我输入(!filter_var($email, filter_validate_email))则无论输入如何,它都returns false

第二个问题是,在加载页面时,它最初会在SQL数据库中添加一个空白条目,并且会添加无效的条目。 即,如果在提交表单时未输入名称,则会运行验证,并且会收到error message “name is required”但仍会在表中使用空白名称创建一个条目。

我正在使用PHP版本5.3.27

这是我正在做的Tafe课程,但是他们目前正在放假,因此我们将不胜感激。

从文件1编码:

<body>
<?php

// define variables and set to empty values
$nameErr;
$Name = $Address = $Phone = $Mobile = $Email="example@example.com";

if ($_SERVER["REQUEST_METHOD"] == "POST")
{

if (empty($_POST["Name"]))
{$nameErr = "Name is required"; }

else {$Name = test_input($_POST["Name"]);}

if (empty($_POST["Address"]))
 {$Address = "";}
else
 {$Address = test_input($_POST["Address"]);}

if (empty($_POST["Phone"]))
 {$Phone = "";}
else
 {$Phone = test_input($_POST["Phone"]);}

if (empty($_POST["Mobile"]))
 {$Mobile = "";}
else
 {$Mobile = test_input($_POST["Mobile"]);}  


if(filter_var($Email, FILTER_VALIDATE_EMAIL)){ 
 echo"Valid Email";
 }
else{ 
echo "Not a Valid Email";    
}
echo phpinfo();
}

function test_input($data)
{
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}

?>

<form name="addcontact" method="post" action= "<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>", "add-contact.php">

<table border="1" cellpadding="2">
<caption> Add New Caption </caption>
<tr>
<td><label for="Name">Name</label></td>
<td><input type="text" name="Name" size="30" maxlenght="50" tabindex="1"/> <span class="error">*<?php echo $nameErr;?></span>
</td>
</tr>

<tr>
<td><label for="Address">Address</label></td>
<td><textarea name="Address" cols="45" rows="5" tabindex="2"></textarea></td>
</tr>

<tr>
<td><label for="Phone">Phone</label></td>
<td><input type="text" name="Phone" size="20" maxlenght="20" tabindex="3" /> </td>
</tr>

<tr>
<td><label for="Mobile">Mobile</label></td>
<td><input type="text" name="Mobile" size="20" maxlenght="20" tabindex="4" /> </td>
</tr>

<tr>
<td><label for="Email">Email</label></td>
<td><input type="text" name="Email" size="30" maxlenght="50" tabindex="5" /></td>
</tr>

<tr>
<td colspan"2" align="center"><input type="Submit" name="Submit" value="Submit" tabindex="6"/>      
</td>
</tr>


</table>
</form>

<?php 
include("add-contact.php");
?>


</body>
</html>`

And coding from file 2:


<body>
<?php 
$Name = $_POST["Name"];
$Address = $_POST["Address"];
$Phone = $_POST["Phone"];
$Mobile = $_POST["Mobile"];
$Email = $_POST["Email"];


$dbc = mysql_connect("localhost:3306", "root", "webbm01");
if (!$dbc)
die ('Could not connect: ' .mysql_error());


$db_selected = mysql_select_db("tafe", $dbc );
if (!$db_selected)
die ('Could not connect: ' . mysql_error());

$qry
 = "INSERT INTO contacts (Name, Address, Phone, Mobile, Email) VALUES ('" . addslashes($Name) . "', '" . addslashes($Address) . "', '" . addslashes($Phone) . "', '" . addslashes($Mobile). "', '" . addslashes($Email) . "')";

$rst = mysql_query($qry, $dbc);

if ($rst)
{
echo "<b><font color='green'>The contact has been added.</font></b>";
}
else 
{
echo "<b><font color='red'>Error: ". mysql_error($dbc) . ". The contact could not be added.</font></b>";
}

mysql_free_result($rst);


?>
</body>
</html>

验证应在文件中进行:

'add-contact.php'

由于这是from动作要求提交的内容。

初始验证器没有意义,因为$ _POST数组未初始化。

空的SQL插入语句的原因是因为您决定执行以下操作:

include("add-contact.php");

在第一个文件中,它在页面的每次加载时都没有有效的$ _POST初始化就运行。

检查此代码以进行电子邮件验证等:

<body> <?php

// define variables and set to empty values


if ($_SERVER["REQUEST_METHOD"] == "POST") {

if (empty($_POST["Name"])) {$nameErr = "Name is required"; }else {$Name = htmlspecialchars($_POST["Name"]);}

if (empty($_POST["Address"]))  {$Address = "";}else{$Address = htmlspecialchars($_POST["Address"]);}

if (empty($_POST["Phone"]))  {$Phone = "";}else {$Phone = htmlspecialchars($_POST["Phone"]);}

if (empty($_POST["Mobile"]))  {$Mobile = "";}else {$Mobile = htmlspecialchars($_POST["Mobile"]);}  


if(filter_var($_POST['Email'], FILTER_VALIDATE_EMAIL)){   echo"Valid Email";  }else{ echo "Not a Valid Email"; }

}

?>

<form name="addcontact" method="post" action= "<?php echo $_SERVER["PHP_SELF"];?>">

<table border="1" cellpadding="2"> <caption> Add New Caption </caption> <tr> <td><label for="Name">Name</label></td> <td><input type="text" name="Name" size="30" maxlenght="50" tabindex="1"/> <span class="error">*<?php echo $nameErr;?></span> </td> </tr>

<tr> <td><label for="Address">Address</label></td> <td><textarea name="Address" cols="45" rows="5" tabindex="2"></textarea></td> </tr>

<tr> <td><label for="Phone">Phone</label></td> <td><input type="text" name="Phone" size="20" maxlenght="20" tabindex="3" /> </td> </tr>

<tr> <td><label for="Mobile">Mobile</label></td> <td><input type="text" name="Mobile" size="20" maxlenght="20" tabindex="4" /> </td> </tr> <tr> <td><label for="Email">Email</label></td> <td><input type="text" name="Email" size="30" maxlenght="50" tabindex="5" /></td> </tr> <tr> <td colspan"2" align="center"><input type="Submit" name="Submit" value="Submit" tabindex="6"/>       </td> </tr> </table> </form>

</body> </html>`

删除行include("add-contact.php");

这将停止在数据库中的空白插入。 同时删除动作

<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>

只需尝试action="add-contact.php" 电子邮件验证对我来说很好。

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