Php 无错误+；显示一个空白页面
我正在开发一个系统，它可以在出现错误时回显不同的表单。 我制作了一个包含所有字段的表单，然后我为每个字段再制作了8个表单。（如果他没有填写第一个字段echo$form_1；如果他没有填写第二个字段echo$form_2等等，但是当我尝试测试代码时，它会显示一个空白页。） register.php：Php 无错误+；显示一个空白页面,php,Php,我正在开发一个系统，它可以在出现错误时回显不同的表单。 我制作了一个包含所有字段的表单，然后我为每个字段再制作了8个表单。（如果他没有填写第一个字段echo$form_1；如果他没有填写第二个字段echo$form_2等等，但是当我尝试测试代码时，它会显示一个空白页。） register.php： <?php require 'regforms.php'; $btsubmit = isset($_POST["btsubmit"]) ; if ($btsubmit) { $
<?php
require 'regforms.php';
$btsubmit = isset($_POST["btsubmit"]) ;
if ($btsubmit) {
$ptuser = $_POST["ptuser"] ;
$ptemail = $_POST["ptemail"] ;
$ptveremail = $_POST["ptveremail"] ;
$ptpass = $_POST["ptpass"] ;
$ptverpass = $_POST["ptverpass"] ;
$ptsecquest = $_POST["ptsecquest"] ;
$ptsecans = $_POST["ptsecans"] ;
$cpantibot = isset($_POST['cpantibot']) ;
if (empty($ptuser) && empty($ptemail) && empty($ptveremail) && empty($ptpass) && empty($ptverpass) && empty($ptsecquest) && empty($ptsecans) && empty($cpantibot)) {
echo $form_1;
} else if (empty($ptuser) && empty($ptemail) && empty($ptveremail) && empty($ptpass) && empty($ptverpass) && empty($ptsecquest) && empty($ptsecans) && $cpantibot) {
echo $form_2;
} else if (empty($ptuser) && empty($ptemail) && empty($ptveremail) && empty($ptpass) && empty($ptverpass) && empty($ptsecquest) && $ptsecans && $cpantibot) {
echo $form_3;
} else if (empty($ptuser) && empty($ptemail) && empty($ptveremail) && empty($ptpass) && empty($ptverpass) && $ptsecquest && $ptsecans && $cpantibot) {
echo $form_4;
} else if (empty($ptuser) && empty($ptemail) && empty($ptveremail) && empty($ptpass) && $ptverpass && $ptsecquest && $ptsecans && $cpantibot) {
echo $form_5;
} else if (empty($ptuser) && empty($ptemail) && empty($ptveremail) && $ptpass && $ptverpass && $ptsecquest && $ptsecans && $cpantibot) {
echo $form_6;
} else if (empty($ptuser) && empty($ptemail) && $ptveremail && $ptpass && $ptverpass && $ptsecquest && $ptsecans && $cpantibot) {
echo $form_7;
} else if (empty($ptuser) && $ptemail && $ptveremail && $ptpass && $ptverpass && $ptsecquest && $ptsecans && $cpantibot) {
echo $form_8;
} else if ($ptuser && $ptemail && $ptveremail && $ptpass && $ptverpass && $ptsecquest && $ptsecans && $cpantibot) {
echo 'ok';
echo $form;
}
} else {
echo $form;
}
?>
<?php
$form = '<form action = "register.php" method = "POST">
<table>
<h3>Basic information</h3>
<tr>
<td>Username : </td>
<td><input type = "text" name = "ptuser"></td>
</tr>
<tr>
<td>Email : </td>
<td><input type = "text" name = "ptemail"></td>
</tr>
<tr>
<td>Verify email: </td>
<td><input type = "text" name = "ptveremail"></td>
</tr>
</table>
<table>
<h3>Security information</h3>
<tr>
<td>Password : </td>
<td><input type = "password" name = "ptpass"></td>
</tr>
<tr>
<td>Verify password : </td>
<td><input type = "password" name = "ptverpass"></td>
</tr>
<tr>
<td>Security question : </td>
<td><input type = "text" name = "ptsecquest"></td>
</tr>
<tr>
<td>Security answer: </td>
<td><input type = "text" name = "ptsecans"></td>
</tr>
</table>
<table>
<h3>Verification</h3>
<table>
<tr>
<td></td>
<td><label><input type="checkbox" name="cpantibot" value="I_am_a_humin">Verify you are a humin</label></td>
</tr>
<tr>
<td></td>
<td><input type = "submit" name = "btsubmit" value = "Submit" ></td>
</tr>
</table>
</form>';
$form_1 = '<form action = "register.php" method = "POST">
<table>
<h3>Basic information</h3>
<tr>
<td>Username : </td>
<td><input type = "text" name = "ptuser"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
<tr>
<td>Email : </td>
<td><input type = "text" name = "ptemail"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
<tr>
<td>Verify email: </td>
<td><input type = "text" name = "ptveremail"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
</table>
<table>
<h3>Security information</h3>
<tr>
<td>Password : </td>
<td><input type = "password" name = "ptpass"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
<tr>
<td>Verify password : </td>
<td><input type = "password" name = "ptverpass"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
<tr>
<td>Security question : </td>
<td><input type = "text" name = "ptsecquest"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
<tr>
<td>Security answer: </td>
<td><input type = "text" name = "ptsecans"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
</table>
<table>
<h3>Verification</h3>
<table>
<tr>
<td></td>
<td><label><input type="checkbox" name="cpantibot" value="I_am_a_humin">Verify you are a humin</label></td>
<td><font color = "red" >Checking this box is required.</font></td>
</tr>
<tr>
<td></td>
<td><input type = "submit" name = "btsubmit" value = "Submit" ></td>
</tr>
</table>
</form>';
$form_2 = '<form action = "register.php" method = "POST">
<table>
<h3>Basic information</h3>
<tr>
<td>Username : </td>
<td><input type = "text" name = "ptuser"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
<tr>
<td>Email : </td>
<td><input type = "text" name = "ptemail"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
<tr>
<td>Verify email: </td>
<td><input type = "text" name = "ptveremail"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
</table>
<table>
<h3>Security information</h3>
<tr>
<td>Password : </td>
<td><input type = "password" name = "ptpass"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
<tr>
<td>Verify password : </td>
<td><input type = "password" name = "ptverpass"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
<tr>
<td>Security question : </td>
<td><input type = "text" name = "ptsecquest"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
<tr>
<td>Security answer: </td>
<td><input type = "text" name = "ptsecans"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
</table>
<table>
<h3>Verification</h3>
<table>
<tr>
<td></td>
<td><label><input type="checkbox" name="cpantibot" value="I_am_a_humin">Verify you are a humin</label></td>
</tr>
<tr>
<td></td>
<td><input type = "submit" name = "btsubmit" value = "Submit" ></td>
</tr>
</table>
</form>';
$form_3 = '<form action = "register.php" method = "POST">
<table>
<h3>Basic information</h3>
<tr>
<td>Username : </td>
<td><input type = "text" name = "ptuser"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
<tr>
<td>Email : </td>
<td><input type = "text" name = "ptemail"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
<tr>
<td>Verify email: </td>
<td><input type = "text" name = "ptveremail"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
</table>
<table>
<h3>Security information</h3>
<tr>
<td>Password : </td>
<td><input type = "password" name = "ptpass"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
<tr>
<td>Verify password : </td>
<td><input type = "password" name = "ptverpass"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
<tr>
<td>Security question : </td>
<td><input type = "text" name = "ptsecquest"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
<tr>
<td>Security answer: </td>
<td><input type = "text" name = "ptsecans" value = "$ptsecans" ></td>
</tr>
</table>
<table>
<h3>Verification</h3>
<table>
<tr>
<td></td>
<td><label><input type="checkbox" name="cpantibot" value="I_am_a_humin">Verify you are a humin</label></td>
</tr>
<tr>
<td></td>
<td><input type = "submit" name = "btsubmit" value = "Submit" ></td>
</tr>
</table>
</form>';
$form_4 = '<form action = "register.php" method = "POST">
<table>
<h3>Basic information</h3>
<tr>
<td>Username : </td>
<td><input type = "text" name = "ptuser"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
<tr>
<td>Email : </td>
<td><input type = "text" name = "ptemail"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
<tr>
<td>Verify email: </td>
<td><input type = "text" name = "ptveremail"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
</table>
<table>
<h3>Security information</h3>
<tr>
<td>Password : </td>
<td><input type = "password" name = "ptpass"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
<tr>
<td>Verify password : </td>
<td><input type = "password" name = "ptverpass"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
<tr>
<td>Security question : </td>
<td><input type = "text" name = "ptsecquest"></td>
</tr>
<tr>
<td>Security answer: </td>
<td><input type = "text" name = "ptsecans"></td>
</tr>
</table>
<table>
<h3>Verification</h3>
<table>
<tr>
<td></td>
<td><label><input type="checkbox" name="cpantibot" value="I_am_a_humin">Verify you are a humin</label></td>
</tr>
<tr>
<td></td>
<td><input type = "submit" name = "btsubmit" value = "Submit" ></td>
</tr>
</table>
</form>';
$form_5 = '<form action = "register.php" method = "POST">
<table>
<h3>Basic information</h3>
<tr>
<td>Username : </td>
<td><input type = "text" name = "ptuser"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
<tr>
<td>Email : </td>
<td><input type = "text" name = "ptemail"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
<tr>
<td>Verify email: </td>
<td><input type = "text" name = "ptveremail"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
</table>
<table>
<h3>Security information</h3>
<tr>
<td>Password : </td>
<td><input type = "password" name = "ptpass"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
<tr>
<td>Verify password : </td>
<td><input type = "password" name = "ptverpass"></td>
</tr>
<tr>
<td>Security question : </td>
<td><input type = "text" name = "ptsecquest"></td>
</tr>
<tr>
<td>Security answer: </td>
<td><input type = "text" name = "ptsecans"></td>
</tr>
</table>
<table>
<h3>Verification</h3>
<table>
<tr>
<td></td>
<td><label><input type="checkbox" name="cpantibot" value="I_am_a_humin">Verify you are a humin</label></td>
</tr>
<tr>
<td></td>
<td><input type = "submit" name = "btsubmit" value = "Submit" ></td>
</tr>
</table>
</form>';
$form_6 = '<form action = "register.php" method = "POST">
<table>
<h3>Basic information</h3>
<tr>
<td>Username : </td>
<td><input type = "text" name = "ptuser"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
<tr>
<td>Email : </td>
<td><input type = "text" name = "ptemail"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
<tr>
<td>Verify email: </td>
<td><input type = "text" name = "ptveremail"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
</table>
<table>
<h3>Security information</h3>
<tr>
<td>Password : </td>
<td><input type = "password" name = "ptpass"></td>
</tr>
<tr>
<td>Verify password : </td>
<td><input type = "password" name = "ptverpass"></td>
</tr>
<tr>
<td>Security question : </td>
<td><input type = "text" name = "ptsecquest"></td>
</tr>
<tr>
<td>Security answer: </td>
<td><input type = "text" name = "ptsecans"></td>
</tr>
</table>
<table>
<h3>Verification</h3>
<table>
<tr>
<td></td>
<td><label><input type="checkbox" name="cpantibot" value="I_am_a_humin">Verify you are a humin</label></td>
</tr>
<tr>
<td></td>
<td><input type = "submit" name = "btsubmit" value = "Submit" ></td>
</tr>
</table>
</form>';
$form_7 = '<form action = "register.php" method = "POST">
<table>
<h3>Basic information</h3>
<tr>
<td>Username : </td>
<td><input type = "text" name = "ptuser"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
<tr>
<td>Email : </td>
<td><input type = "text" name = "ptemail"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
<tr>
<td>Verify email: </td>
<td><input type = "text" name = "ptveremail" value = "$ptveremail" ></td>
</tr>
</table>
<table>
<h3>Security information</h3>
<tr>
<td>Password : </td>
<td><input type = "password" name = "ptpass"></td>
</tr>
<tr>
<td>Verify password : </td>
<td><input type = "password" name = "ptverpass"></td>
</tr>
<tr>
<td>Security question : </td>
<td><input type = "text" name = "ptsecquest"></td>
</tr>
<tr>
<td>Security answer: </td>
<td><input type = "text" name = "ptsecans"></td>
</tr>
</table>
<table>
<h3>Verification</h3>
<table>
<tr>
<td></td>
<td><label><input type="checkbox" name="cpantibot" value="I_am_a_humin">Verify you are a humin</label></td>
</tr>
<tr>
<td></td>
<td><input type = "submit" name = "btsubmit" value = "Submit" ></td>
</tr>
</table>
</form>';
$form_8 = '<form action = "register.php" method = "POST">
<table>
<h3>Basic information</h3>
<tr>
<td>Username : </td>
<td><input type = "text" name = "ptuser"></td>
<td><font color = "red" >This field is required.</font></td>
</tr>
<tr>
<td>Email : </td>
<td><input type = "text" name = "ptemail" value = "$ptemail" ></td>
</tr>
<tr>
<td>Verify email: </td>
<td><input type = "text" name = "ptveremail" value = "$ptveremail" ></td>
</tr>
</table>
<table>
<h3>Security information</h3>
<tr>
<td>Password : </td>
<td><input type = "password" name = "ptpass"></td>
</tr>
<tr>
<td>Verify password : </td>
<td><input type = "password" name = "ptverpass"></td>
</tr>
<tr>
<td>Security question : </td>
<td><input type = "text" name = "ptsecquest"></td>
</tr>
<tr>
<td>Security answer: </td>
<td><input type = "text" name = "ptsecans"></td>
</tr>
</table>
<table>
<h3>Verification</h3>
<table>
<tr>
<td></td>
<td><label><input type="checkbox" name="cpantibot" value="I_am_a_humin">Verify you are a humin</label></td>
</tr>
<tr>
<td></td>
<td><input type = "submit" name = "btsubmit" value = "Submit" ></td>
</tr>
</table>
</form>';
?>
检查格式。查看脚本的结尾以及第一条IF语句关闭/未关闭的情况。您没有关闭最后一条[elseif]语句！请尝试以下操作：
<?php
require 'regforms.php';
$btsubmit = isset($_POST["btsubmit"]) ;
if ($btsubmit) {
$ptuser = $_POST["ptuser"] ;
$ptemail = $_POST["ptemail"] ;
$ptveremail = $_POST["ptveremail"] ;
$ptpass = $_POST["ptpass"] ;
$ptverpass = $_POST["ptverpass"] ;
$ptsecquest = $_POST["ptsecquest"] ;
$ptsecans = $_POST["ptsecans"] ;
$cpantibot = isset($_POST['cpantibot']) ;
if (empty($ptuser) && empty($ptemail) && empty($ptveremail) && empty($ptpass) && empty($ptverpass) && empty($ptsecquest) && empty($ptsecans) && empty($cpantibot)) {
echo $form_1;
} else if (empty($ptuser) && empty($ptemail) && empty($ptveremail) && empty($ptpass) && empty($ptverpass) && empty($ptsecquest) && empty($ptsecans) && $cpantibot) {
echo $form_2;
} else if (empty($ptuser) && empty($ptemail) && empty($ptveremail) && empty($ptpass) && empty($ptverpass) && empty($ptsecquest) && $ptsecans && $cpantibot) {
echo $form_3;
} else if (empty($ptuser) && empty($ptemail) && empty($ptveremail) && empty($ptpass) && empty($ptverpass) && $ptsecquest && $ptsecans && $cpantibot) {
echo $form_4;
} else if (empty($ptuser) && empty($ptemail) && empty($ptveremail) && empty($ptpass) && $ptverpass && $ptsecquest && $ptsecans && $cpantibot) {
echo $form_5;
} else if (empty($ptuser) && empty($ptemail) && empty($ptveremail) && $ptpass && $ptverpass && $ptsecquest && $ptsecans && $cpantibot) {
echo $form_6;
} else if (empty($ptuser) && empty($ptemail) && $ptveremail && $ptpass && $ptverpass && $ptsecquest && $ptsecans && $cpantibot) {
echo $form_7;
} else if (empty($ptuser) && $ptemail && $ptveremail && $ptpass && $ptverpass && $ptsecquest && $ptsecans && $cpantibot) {
echo $form_8;
} else if ($ptuser && $ptemail && $ptveremail && $ptpass && $ptverpass && $ptsecquest && $ptsecans && $cpantibot) {
echo 'ok';
echo $form;
} else {
echo $form;
}
} else {
echo $form;
}
?>
检查格式。查看脚本的结尾以及第一条IF语句关闭/未关闭的情况。您没有关闭最后一条[elseif]语句！请尝试以下操作：
<?php
require 'regforms.php';
$btsubmit = isset($_POST["btsubmit"]) ;
if ($btsubmit) {
$ptuser = $_POST["ptuser"] ;
$ptemail = $_POST["ptemail"] ;
$ptveremail = $_POST["ptveremail"] ;
$ptpass = $_POST["ptpass"] ;
$ptverpass = $_POST["ptverpass"] ;
$ptsecquest = $_POST["ptsecquest"] ;
$ptsecans = $_POST["ptsecans"] ;
$cpantibot = isset($_POST['cpantibot']) ;
if (empty($ptuser) && empty($ptemail) && empty($ptveremail) && empty($ptpass) && empty($ptverpass) && empty($ptsecquest) && empty($ptsecans) && empty($cpantibot)) {
echo $form_1;
} else if (empty($ptuser) && empty($ptemail) && empty($ptveremail) && empty($ptpass) && empty($ptverpass) && empty($ptsecquest) && empty($ptsecans) && $cpantibot) {
echo $form_2;
} else if (empty($ptuser) && empty($ptemail) && empty($ptveremail) && empty($ptpass) && empty($ptverpass) && empty($ptsecquest) && $ptsecans && $cpantibot) {
echo $form_3;
} else if (empty($ptuser) && empty($ptemail) && empty($ptveremail) && empty($ptpass) && empty($ptverpass) && $ptsecquest && $ptsecans && $cpantibot) {
echo $form_4;
} else if (empty($ptuser) && empty($ptemail) && empty($ptveremail) && empty($ptpass) && $ptverpass && $ptsecquest && $ptsecans && $cpantibot) {
echo $form_5;
} else if (empty($ptuser) && empty($ptemail) && empty($ptveremail) && $ptpass && $ptverpass && $ptsecquest && $ptsecans && $cpantibot) {
echo $form_6;
} else if (empty($ptuser) && empty($ptemail) && $ptveremail && $ptpass && $ptverpass && $ptsecquest && $ptsecans && $cpantibot) {
echo $form_7;
} else if (empty($ptuser) && $ptemail && $ptveremail && $ptpass && $ptverpass && $ptsecquest && $ptsecans && $cpantibot) {
echo $form_8;
} else if ($ptuser && $ptemail && $ptveremail && $ptpass && $ptverpass && $ptsecquest && $ptsecans && $cpantibot) {
echo 'ok';
echo $form;
} else {
echo $form;
}
} else {
echo $form;
}
?>
尝试更好地构建代码。以下是我建议您处理此问题的方法： 请注意，这是假设您使用的是PHP5.4+，并且上面有短标记。如果没有，请替换
基本信息
用户名：
电邮：
验证电子邮件：
安全信息
密码：
验证密码：
安全问题：
保安答覆：
验证
基本信息
用户名：
电邮：
验证电子邮件：
安全信息
密码：
验证密码：
安全问题：
保安答覆：
验证
好，如果您试图验证表单字段，则可能需要 a） 稍微清理一下输入 b） 简化代码 您不需要8个不同的表单，只需要一个表单，并在无法验证的字段旁边回显“missing field”变量值 您可能希望从以下内容开始（或者将其进一步简化，并在此基础上形成一个循环）：
ini_集（'display_errors'，'On'）；ini_集（'html_错误'，0）；错误报告（-1）仍然是死亡的白色屏幕：（然后检查你的Web服务器日志，我也试过了……什么都没有……嘿，你的代码对我有用。你能告诉我所有表单变量有什么不同吗？因为通过查看它们，它们看起来都是相同的。另外，你的两个文件是否在同一工作位置？白色死亡屏幕：错误检查\显示关闭，打开它们以查看错误。）r、 在php页面顶部添加：ini_集（'display_errors'，'On'）；ini_集（'html_errors'，0）；错误报告（-1）；
仍然是一个白色的死亡屏幕：（然后检查你的Web服务器日志，我也试过了……没什么……嘿，你的代码对我有用。你能告诉我所有的表单变量有什么不同吗？因为通过查看它们，它们看起来都是相同的。而且你的两个文件是否在同一工作位置？只是想说它不需要我去空白页，但它不会回显表单8或form_7等它只是刷新页面你想做什么？那是为了表单域验证吗？是的，我想验证一些域。只是想说它不带我到空白页，但它不回显form_8或form_7等它只是刷新页面你想做什么？那是为了表单域验证吗？是的，我想验证一些域。你知道吗…你是一个天才，但现在请告诉我，每件事都是一种魅力，我如何回应已经填充了值的字段（例如用户名、电子邮件和验证电子邮件）不希望每次出现错误时都使用重新键入它们。嗯，这应该可以正常工作。如果查看
标记内部，您将看到我输出了$errors[''的值
在表的第三个单元格中。如果它被设置为某个值，如$fieldIsRequired
，它将显示您的错误消息。如果不是，它将不会在单元格中显示任何内容。对不起，您可以解释更多吗？要添加什么以及在哪里添加？我想添加，因为在本例中是一个php值，例如$ptveremail。您想在哪里添加它？啊，我想添加它请看…您可以在您的
标签中设置value=“”
，将其值设置为您的php变量。我将更新我的答案。您…您是一个天才，但现在请告诉我，每件事都很有魅力，我是如何回显已填充值的字段的（例如用户名、电子邮件和验证电子邮件）我不想在每次出现错误时都重新键入它们
<?php
require 'regforms.php';
$btsubmit = $ptuser = $ptemail = $ptveremail = $ptpass = $ptverpass = $ptsecquest = $ptsecans = $cpantibot = '';
$btsubmit = isset($_POST['btsubmit']) ? filter_var($_POST['btsubmit'], FILTER_SANITIZE_STRING) : 'failed';
if (!empty($btsubmit) && $btsubmit != ' ' && $btsubmit != 'failed') {
$ptuser = isset($_POST['ptuser']) ? filter_var($_POST['ptuser'], FILTER_SANITIZE_STRING) : 'failed';
$ptemail = isset($_POST['ptemail']) ? filter_var($_POST['ptemail'], FILTER_SANITIZE_EMAIL) : 'failed';
$ptveremail = isset($_POST['ptveremail']) ? filter_var($_POST['ptveremail'], FILTER_SANITIZE_EMAIL) : 'failed';
$ptpass = isset($_POST['ptpass']) ? filter_var($_POST['ptpass'], FILTER_SANITIZE_STRING) : 'failed';
$ptverpass = isset($_POST['ptverpass']) ? filter_var($_POST['ptverpass'], FILTER_SANITIZE_STRING) : 'failed';
$ptsecquest = isset($_POST['ptsecquest']) ? filter_var($_POST['ptsecquest'], FILTER_SANITIZE_STRING) : 'failed';
$ptsecans = isset($_POST['ptsecans']) ? filter_var($_POST['ptsecans'], FILTER_SANITIZE_STRING) : 'failed';
$cpantibot = isset($_POST['cpantibot']) ? filter_var($_POST['cpantibot'], FILTER_SANITIZE_STRING) : 'failed';
if($ptuser == 'failed'){ $ptuserErr = 'Missing field!'; }
if($ptemail == 'failed'){ $ptemailErr = 'Missing field!'; }
if($ptveremail == 'failed'){ $ptveremailErr = 'Missing field!'; }
if($ptpass == 'failed'){ $ptpassErr = 'Missing field!'; }
if($ptverpass == 'failed'){ $ptverpassErr = 'Missing field!'; }
if($ptsecquest == 'failed'){ $ptsecquestErr = 'Missing field!'; }
if($ptsecans == 'failed'){ $ptsecansErr = 'Missing field!'; }
if($cpantibot == 'failed'){ $cpantibotErr = 'Missing field!'; }
<td>Username : </td>
<td><input type = "text" name = "ptuser"><font color = "red" ><?php echo $ptuserErr; ?></font></td>