Question

我正在尝试在包含另一个PHP之前验证输入，以便用户可以在同一页面上获取错误，如果有一个... 4输入是必需的但其他是可选的..我想要做的是如果用户只填写4个必需的输入验证输入，而不是包含另一个PHP文件（而不是包括PHP我改为使用JavaScript来提醒我代码运行良好..）并且如果用户也填写其他可选输入为了验证它们并包含一个PHP文件，我遇到的问题是，即使用户插入无效字符，它仍然会提醒我代码是好的。如果用户使用允许的字符填充输入，我只希望它处理最后的JavaScript ..

这是PHP：

   <?php
// define variables and set to empty values
$titleErr = $MdescripErr = $posterErr = $vcodeErr = $vcode2Err = $vcode3Err = $mlink1Err = $mlink2Err = $mlink3Err = "";
$title = $Mdescrip = $poster = $comment = $vcode = $vcode2 = $vcode3 = $mlink1 = $comment = $mlink2 = $mlink3 = "";

if ($_SERVER["REQUEST_METHOD"] == "POST")
{
   if (empty($_POST["title"]))
     {$titleErr = "title is required";}
   else
     {
     $title = test_input($_POST["title"]);
     // check if name only contains letters and whitespace
     if (!preg_match("/^[A-Za-z0-9 ]*$/",$title))
       {
       $titleErr = "Only letters and white space allowed";
       }
     }

     if (empty($_POST["Mdescrip"]))
     {$MdescripErr = "Movie Description is required";}
   else
     {
     $Mdescrip = test_input($_POST["Mdescrip"]);
     // check if name only contains letters and whitespace
     if (!preg_match("/^[A-Za-z0-9 ]*$/",$Mdescrip))
       {
       $MdescripErr = "Only letters and white space allowed";
       }
     }


   if (empty($_POST["poster"]))
     {$posterErr = "Poster Link is required";}
   else
     {
     $poster = test_input($_POST["poster"]);
     // check if URL address syntax is valid (this regular expression also allows dashes in the URL)
     if (!preg_match("/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0-9+&@#\/%?=~_|!:,.;]*[-a-z0-9+&@#\/%=~_|]/i",$poster))
       {
       $posterErr = "Invalid URL"; 
       }
     }

     if (empty($_POST["vcode"]))
     {$vcodeErr = "Embed Link is required";}
   else
     {
     $vcode = test_input($_POST["vcode"]);
     // check if URL address syntax is valid (this regular expression also allows dashes in the URL)
     if (!preg_match("/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0-9+&@#\/%?=~_|!:,.;]*[-a-z0-9+&@#\/%=~_|]/i",$vcode))
       {
       $vcodeErr = "Invalid URL"; 
       }
     }


    if (empty($_POST["vcode2"]))
     {$vcode2 = "";}
   else
     {
     $vcode2 = test_input($_POST["vcode2"]);
     // check if URL address syntax is valid (this regular expression also allows dashes in the URL)
     if (!preg_match("/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0-9+&@#\/%?=~_|!:,.;]*[-a-z0-9+&@#\/%=~_|]/i",$vcode2))
       {
       $vcode2Err = "Invalid URL"; 
       }
     }

     if (empty($_POST["vcode3"]))
     {$vcode3 = "";}
   else
     {
     $vcode3 = test_input($_POST["vcode3"]);
     // check if URL address syntax is valid (this regular expression also allows dashes in the URL)
     if (!preg_match("/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0-9+&@#\/%?=~_|!:,.;]*[-a-z0-9+&@#\/%=~_|]/i",$vcode3))
       {
       $vcode3Err = "Invalid URL"; 
       }
     }

     if (empty($_POST["mlink1"]))
     {$mlink1 = "";}
   else
     {
     $mlink1 = test_input($_POST["mlink1"]);
     // check if URL address syntax is valid (this regular expression also allows dashes in the URL)
     if (!preg_match("/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0-9+&@#\/%?=~_|!:,.;]*[-a-z0-9+&@#\/%=~_|]/i",$mlink1))
       {
       $mlink1Err = "Invalid URL"; 
       }
     }

     if (empty($_POST["mlink2"]))
     {$mlink2 = "";}
   else
     {
     $mlink2= test_input($_POST["mlink2"]);
     // check if URL address syntax is valid (this regular expression also allows dashes in the URL)
     if (!preg_match("/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0-9+&@#\/%?=~_|!:,.;]*[-a-z0-9+&@#\/%=~_|]/i",$mlink2))
       {
       $mlink2Err = "Invalid URL"; 
       }
     }

     if (empty($_POST["mlink3"]))
     {$mlink3 = "";}
   else
     {
     $mlink3 = test_input($_POST["mlink3"]);
     // check if URL address syntax is valid (this regular expression also allows dashes in the URL)
     if (!preg_match("/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0-9+&@#\/%?=~_|!:,.;]*[-a-z0-9+&@#\/%=~_|]/i",$mlink3))
       {
       $mlink3Err = "Invalid URL"; 
       }
     }


}

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

if ($title == NULL || $Mdescrip == NULL || $poster == NULL || $vcode == NULL)
{
}
else if (!preg_match("/^[A-Za-z0-9 ]*$/",$title) ||!preg_match("/^[A-Za-z0-9 ]*$/",$Mdescrip) || !preg_match("/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0-9+&@#\/%?=~_|!:,.;]*[-a-z0-9+&@#\/%=~_|]/i",$poster) || !preg_match("/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0-9+&@#\/%?=~_|!:,.;]*[-a-z0-9+&@#\/%=~_|]/i",$vcode))
{
}
else
     {
?>
<script>

alert("it went through");

</script>
<?php
}


?>

Answer 1

您应该尝试拆分网址并删除不必要的项目，例如“https：//”，这样您就可以使用“http://www.stackoverflow.com/bla/bla/bla”之类的网址，并将其拆分为[“http”，“”，“www .stackoverflow.com”， “血乳酸”， “血乳酸”， “血乳酸”] 最后检查每个元素是否设置（有效），这将使您的验证非常简单

如何用PHP验证html表单

1 个答案: