Php 如何使表单标记中的action属性正常工作？
我知道标签表单有一个名为action的属性，我知道action是如何工作的，我就是这样使用它的Php 如何使表单标记中的action属性正常工作？,php,html,forms,validation,Php,Html,Forms,Validation,我知道标签表单有一个名为action的属性，我知道action是如何工作的，我就是这样使用它的 <form method="post" action = "registerd.php"> </form> 这是我正在写的全部代码 事先非常感谢 <div id = "content"> <?php $fnameErr = ""; $lnameErr = "";
<form method="post" action = "registerd.php">
</form>
<div id = "content">
<?php
$fnameErr = "";
$lnameErr = "";
$idErr = "";
$placeErr = "";
$dateErr = "";
$emailErr = "";
$pswErr = "";
$file;
$content = "";
function test_input($data) {
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}
if(isset($_POST['register'])){
if(isset($_POST['firstname'])){
if(!empty($_POST['firstname'])){
if(strlen($_POST['firstname'])>1){
if(preg_match("/[a-zA-Z]+/", $_POST['firstname'])==1){
$firstname = test_input($_POST['firstname']);
$content .= "firstname:";
$content .= $firstname;
$content .= " ";
}
else{
$fnameErr = "your first name should only include letters";
}
}
else{
$fnameErr = "your first name must be at least 2 characters";
}
}
else{
$fnameErr = "enter your first name";
}
}
else{
$fnameErr = "enter your first name";
}
if(isset($_POST['lastname'])){
if(!empty($_POST['lastname'])){
if(strlen($_POST['lastname'])>3){
if(preg_match("/[a-zA-Z]+/", $_POST['lastname'])==1){
$lastname = test_input($_POST['lastname']);
$content .= "lastname:";
$content .= $lastname;
$content .= " ";
}
else{
$lnameErr = "your last name should only include letters";
}
}
else{
$lnameErr = "your last name must be at least 2 characters";
}
}
else{
$lnameErr = "enter your last name";
}
}
else{
$lnameErr = "enter your last name";
}
if(isset($_POST['idnum'])){
if(!empty($_POST['idnum'])){
if(strlen($_POST['idnum'])==10){
if(preg_match("/[0-9]{10}/", $_POST['idnum'])==1){
$idnum = test_input($_POST['idnum']);
$content .= "ID_No.:";
$content .= $idnum;
$content .= " ";
}
else{
$idErr = "your ID number should only include digits";
}
}
else{
$idErr = "your ID number must be 10 digits";
}
}
else{
$idErr = "enter your ID number";
}
}
else{
$idErr = "enter your ID number";
}
if(isset($_POST['placeOfBirth'])){
if(!empty($_POST['placeOfBirth'])){
if(strlen($_POST['placeOfBirth'])>2){
if(preg_match("/[a-zA-Z]+/", $_POST['placeOfBirth'])==1){
$placeOfBirth = test_input($_POST['placeOfBirth']);
$content .= "placeOfBirth:";
$content .= $placeOfBirth;
$content .= " ";
}
else{
$placeErr = "your place of birth should only include digits";
}
}
else{
$placeErr = "your place of birth must be at least 3 letters";
}
}
}
if(isset($_POST['date'])){
if(!empty($_POST['date'])){
$date = test_input($_POST['date']);
$content .= "date:";
$content .= $date;
$content .= " ";
}
else{
$dateErr = "enter your date of birth";
}
}
else{
$dateErr = "enter your date of birth";
}
if(isset($_POST['email'])){
if(!empty($_POST['email'])){
$email = test_input($_POST['email']);
$content .= "email:";
$content .= $email;
$content .= " ";
}
else{
$emailErr = "enter your email";
}
}
else{
$emailErr = "enter your email";
}
if(isset($_POST['password'])){
if(!empty($_POST['password'])){
if(preg_match("/(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?!.*\s).*$/", $_POST['password'])==1){
$password = test_input($_POST['password']);
$content .= "password:";
$content .= $password;
$content .= " ";
}
else{
$pswErr = "your password should have numbers, uppercase<br/> & lowercase letters";
}
}
else{
$pswErr = "enter your password";
}
}
else{
$pswErr = "enter your password";
}
if(file_exists($email.".txt")){
echo(
"<script>
alert('this email already exists!');
</script>"
);
$firstname = $lastname = $idnum = $date = $placeOfBirth = $password = "";
}
else{
$file = fopen($email.".txt","a+") or die("Unable to open file!");
fwrite($file, $content);
fclose($file);
header("location: registered.php");
}
}
?>
<fieldset id = "fieldset">
<legend><h1 class = "reg" >Register Form</h1></legend>
<form method="post" action="#" enctype = "multipart/form-data">
<table class = "table">
<tr>
<td class = "labels">
<p class = "star">*</p> First Name
</td>
<td><input class = "inclass" type="text" required="required" placeholder="Please enter your first name" id = "firstname" name="firstname" onclick = "colorBorder(this.id)"/></td>
</tr>
<td class = "err">
<span>
<?php
echo $fnameErr;
?>
</span>
</td>
<tr>
<td class = "labels"><p class = "star">*</p> Last Name</td>
<td><input class = "inclass" type="text" required="required" placeholder="Please enter your last name" name="lastname" id = "lastname" onclick = "colorBorder(this.id)"/></td>
</tr>
<td class = "err">
<span>
<?php
echo $lnameErr;
?>
</span>
</td>
<tr>
<td class = "labels">Gender</td>
<td>
<input class = "inclass" type="radio" name="gender" value="0" /><p class = "radio" >Male</p>
<input class = "inclass" type="radio" name="gender" value="1" /><p class = "radio" >Female</p>
</td>
</tr>
<tr>
<td class = "labels"><p class = "star">*</p> ID Number</td>
<td><input class = "inclass" type="text" id="idnum" required="required" placeholder="Please enter your ID number" name="idnum" onclick = "colorBorder(this.id)"/></td>
</tr>
<td class = "err">
<span>
<?php
echo $idErr;
?>
</span>
</td>
<tr>
<td class = "labels">Place of Birth</td>
<td><input class = "inclass" type="text" placeholder="Please enter your place of birth" name="placeOfBirth" id = "place" onclick = "colorBorder(this.id)"/></td>
</tr>
<td class = "err">
<span>
<?php
echo $placeErr;
?>
</span>
</td>
<tr>
<td class = "labels"><p class = "star">*</p> Date Of Birth</td>
<td><input class = "inclass" type="date" id = "date" name="date"/></td>
</tr>
<td class = "err">
<span>
<?php
echo $dateErr;
?>
</span>
</td>
<tr>
<td class = "labels"><p class = "star">*</p> Email</td>
<td><input class = "inclass" type="email" required="required" placeholder="Please enter your email" name="email" id = "email" onclick = "colorBorder(this.id)"/></td>
</tr>
<td class = "err">
<span>
<?php
echo $emailErr;
?>
</span>
</td>
<tr>
<td class = "labels"><p class = "star">*</p> Passwords</td>
<td><input class = "inclass" type="password" required="required" placeholder="Please enter your password" name="password" id = "password" onclick = "colorBorder(this.id)"/></td>
</tr>
<td class = "err">
<span>
<?php
echo $pswErr;
?>
</span>
</td>
<tr>
<td><input type="submit" name="register" value="register" class="save"/></td>
<td><input type="reset" name = "reset" id = "reset"/></td>
</tr>
</table>
</form>
</fieldset>
</div>
在register.php上写下您的php验证代码，如果值未验证，则使用header函数重定向到您的表单页面
header("location : form.php")
下面采用的方法绕过了对isset的多余使用。这也意味着在检查是否设置了提交按钮值之后，检查所有的$\u POST['data']
变量（合并到代码的一部分）。函数函数测试输入（$data）{…}
被完全删除，因为上面提到的部分也做了完全相同的事情。。。为了简洁起见，多行字符串连接被压缩为一行。。。似乎到处都有一些无关的if（）{…}else{…}
子句。这些被忽略了，因为它们可能会对原始海报起到某种作用（尽管不太可能）。最后，确保表单被发回当前正在执行的脚本（考虑到表单数据的处理在同一个脚本中）；我们将表单的action
属性保留为空：这意味着表单将自动回发到自身-当前脚本
<?php
// AT THE VERY TOP OF THE SCRIPT - PREFERABLY NOT WITHIN A DIV OR ANY CONTAINER, START YOUR PHP CODES...
$fnameErr = "";
$lnameErr = "";
$idErr = "";
$placeErr = "";
$dateErr = "";
$emailErr = "";
$pswErr = "";
$content = "";
$file;
if(isset($_POST['register'])){
// GATHER A FILTERED VERSION OF THE POST VARIABLES:
$firstName = isset($_POST['firstname']) ? htmlspecialchars(stripslashes(trim($_POST['firstname']))) : null;
$lastName = isset($_POST['lastname']) ? htmlspecialchars(stripslashes(trim($_POST['lastname']))) : null;
$idNum = isset($_POST['idnum']) ? htmlspecialchars(stripslashes(trim($_POST['idnum']))) : null;
$placeOfBirth = isset($_POST['placeOfBirth']) ? htmlspecialchars(stripslashes(trim($_POST['placeOfBirth']))) : null;
$date = isset($_POST['date']) ? htmlspecialchars(stripslashes(trim($_POST['date']))) : null;
$email = isset($_POST['email']) ? htmlspecialchars(stripslashes(trim($_POST['email']))) : null;
$password = isset($_POST['password']) ? htmlspecialchars(stripslashes(trim($_POST['password']))) : null;
if($firstName){
if(!empty($firstName)){
if(strlen($firstName)>1){
if(preg_match("/[a-zA-Z]+/", $firstName)==1){
$content .= "firstname:" . $firstName . " ";
}
else{
$fnameErr = "Your first name should only include letters";
}
}
else{
$fnameErr = "Your first name must be at least 2 characters";
}
}
else{
$fnameErr = "Enter your first name";
}
}else{
$fnameErr = "Enter your first name";
}
if(isset($lastName)){
if(!empty($lastName)){
if(strlen($lastName)>3){
if(preg_match("/[a-zA-Z]+/", $_POST['lastname'])==1){
$content .= "lastname:" . $lastName . " ";
}
else{
$lnameErr = "Your last name should only include letters";
}
}
else{
$lnameErr = "Your last name must be at least 2 characters";
}
}
else{
$lnameErr = "Enter your last name";
}
}else{
$lnameErr = "Enter your last name";
}
if(isset($idNum)){
if(!empty($idNum)){
if(strlen($idNum) == 10){
if(preg_match("/[0-9]{10}/", $_POST['idnum'])==1){
$content .= "ID_No.:" . $idNum . " ";
}
else{
$idErr = "Your ID number should only include digits";
}
}
else{
$idErr = "Your ID number must be 10 digits";
}
}
else{
$idErr = "Enter your ID number";
}
}else{
$idErr = "Enter your ID number";
}
if(isset($placeOfBirth)){
if(!empty($placeOfBirth)){
if(strlen($placeOfBirth)>2){
if(preg_match("/[a-zA-Z]+/", $placeOfBirth)==1){
$content .= "placeOfBirth:" . $placeOfBirth . " ";
}
else{
$placeErr = "Your place of birth should only include digits";
}
}else{
$placeErr = "Your place of birth must be at least 3 letters";
}
}
}
if(isset($date)){
if(!empty($date)){
$content .= "date:" . $date . " ";
}else{
$dateErr = "Enter your date of birth";
}
}else{
$dateErr = "Enter your date of birth";
}
if(isset($email)){
if(!empty($email)){
$content .= "email:" . $email . " ";
}else{
$emailErr = "Enter your email";
}
}else{
$emailErr = "Enter your email";
}
if(isset($password)){
if(!empty($password)){
if(preg_match("/(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?!.*\s).*$/", $password)==1){
$content .= "password:" . $password . " ";
}else{
$pswErr = "Your password should have numbers, uppercase<br/> & lowercase letters";
}
}else{
$pswErr = "Enter your password";
}
}else{
$pswErr = "Enter your password";
}
if(file_exists($email.".txt")){
echo "<script type='text/javascript'>alert('this email already exists!');</script>";
$firstname = $lastname = $idnum = $date = $placeOfBirth = $password = "";
}
else{
$file = fopen($email.".txt","a+") or die("Unable to open file!");
fwrite($file, $content);
fclose($file);
header("location: registered.php");
}
}
?>
<div id = "content">
<fieldset id = "fieldset">
<legend><h1 class = "reg" >Register Form</h1></legend>
<!-- SINCE YOUR VALIDATION IS IN THE CURRENT SCRIPT, LEAVING THE action ATTRIBUTE EMPTY IMPLIES THAT THE FORM WILL POST BACK TO ITSELF [THE CURRENT SCRIPT]. -->
<form method="POST" action="" enctype = "multipart/form-data">
<table class = "table">
<tr>
<td class = "labels">
<p class = "star">*</p> First Name
</td>
<td>
<input class = "inclass" type="text" required="required" placeholder="Please enter your first name" id = "firstname" name="firstname" onclick = "colorBorder(this.id)"/>
</td>
<td class = "err">
<span><?php echo $fnameErr; ?></span>
</td>
</tr>
<tr>
<td class = "labels"><p class = "star">*</p> Last Name</td>
<td>
<input class = "inclass" type="text" required="required" placeholder="Please enter your last name" name="lastname" id = "lastname" onclick = "colorBorder(this.id)"/>
</td>
<td class = "err">
<span><?php echo $lnameErr; ?></span>
</td>
</tr>
<tr>
<td class = "labels">Gender</td>
<td>
<input class = "inclass" type="radio" name="gender" value="0" /><p class = "radio" >Male</p>
<input class = "inclass" type="radio" name="gender" value="1" /><p class = "radio" >Female</p>
</td>
</tr>
<tr>
<td class = "labels"><p class = "star">*</p> ID Number</td>
<td>
<input class = "inclass" type="text" id="idnum" required="required" placeholder="Please enter your ID number" name="idnum" onclick = "colorBorder(this.id)"/>
</td>
<td class = "err">
<span><?php echo $idErr; ?></span>
</td>
</tr>
<tr>
<td class = "labels">Place of Birth</td>
<td>
<input class = "inclass" type="text" placeholder="Please enter your place of birth" name="placeOfBirth" id = "place" onclick = "colorBorder(this.id)"/>
</td>
<td class = "err">
<span><?php echo $placeErr; ?></span>
</td>
</tr>
<tr>
<td class = "labels"><p class = "star">*</p> Date Of Birth</td>
<td>
<input class = "inclass" type="date" id = "date" name="date"/>
</td>
<td class = "err">
<span><?php echo $dateErr; ?></span>
</td>
</tr>
<tr>
<td class = "labels"><p class = "star">*</p> Email</td>
<td>
<input class = "inclass" type="email" required="required" placeholder="Please enter your email" name="email" id = "email" onclick = "colorBorder(this.id)"/>
</td>
<td class = "err">
<span><?php echo $emailErr; ?></span>
</td>
</tr>
<tr>
<td class = "labels"><p class = "star">*</p> Passwords</td>
<td>
<input class = "inclass" type="password" required="required" placeholder="Please enter your password" name="password" id = "password" onclick = "colorBorder(this.id)"/>
</td>
<td class = "err">
<span><?php echo $pswErr; ?></span>
</td>
</tr>
<tr>
<td> </td>
<td><input type="submit" name="register" value="register" class="save"/></td>
<td><input type="reset" name = "reset" id = "reset"/></td>
</tr>
</table>
</form>
</fieldset>
</div>
我认为解决您问题的方法是将您的代码、HTML放在一个文件（“form.php”）中、php验证放在另一个文件（“validate.php”）中：
- “form.php”将收集数据，表单的“action”将执行“validate.php”
- “validate.php”将验证数据，如果没有发现错误，它将“header”到“registered.php”，如果发现错误，它将把消息存储在$\u会话中，“header”返回到“form.php”，在那里显示消息
例如：
form.php
<?php
session_start(); // NECESSARY TO USE $_SESSION.
?>
<html>
<body>
<form action="validate.php" method="post">
Enter 0 or 1 : <input type="text" name="num"/>
<br/>
<input type="submit" value="Submit"/>
</form>
<?php
// CHECK IF THERE IS ERROR MESSAGE FROM VALIDATION.
if ( isset( $_SESSION[ "err_msg" ] ) )
{ echo $_SESSION[ "err_msg" ];
unset( $_SESSION[ "err_msg" ] ); // VERY IMPORTANT : DESTROY ERROR MESSAGE.
}
?>
</body>
</html>
<?php
session_start(); // NECESSARY TO USE $_SESSION.
if ( isset( $_POST[ "num" ] ) ) // IF CALLED FROM "FORM.PHP"
{ $num = $_POST[ "num" ];
if ( ( $num == "0" ) || ( $num == "1" ) ) // VALIDATE NUMBER.
header( "Location: registered.php" ); // NO ERROR.
else { $_SESSION[ "err_msg" ] = "Number must be 0 or 1."; // MESSAGE.
header( "Location: form.php" ); // ERROR.
}
}
else header( "Location: form.php" ); // WASN'T CALLED FROM "FORM.PHP".
?>
输入0或1：
validate.php
<?php
session_start(); // NECESSARY TO USE $_SESSION.
?>
<html>
<body>
<form action="validate.php" method="post">
Enter 0 or 1 : <input type="text" name="num"/>
<br/>
<input type="submit" value="Submit"/>
</form>
<?php
// CHECK IF THERE IS ERROR MESSAGE FROM VALIDATION.
if ( isset( $_SESSION[ "err_msg" ] ) )
{ echo $_SESSION[ "err_msg" ];
unset( $_SESSION[ "err_msg" ] ); // VERY IMPORTANT : DESTROY ERROR MESSAGE.
}
?>
</body>
</html>
<?php
session_start(); // NECESSARY TO USE $_SESSION.
if ( isset( $_POST[ "num" ] ) ) // IF CALLED FROM "FORM.PHP"
{ $num = $_POST[ "num" ];
if ( ( $num == "0" ) || ( $num == "1" ) ) // VALIDATE NUMBER.
header( "Location: registered.php" ); // NO ERROR.
else { $_SESSION[ "err_msg" ] = "Number must be 0 or 1."; // MESSAGE.
header( "Location: form.php" ); // ERROR.
}
}
else header( "Location: form.php" ); // WASN'T CALLED FROM "FORM.PHP".
?>
这是很多if/else块。也许你可以稍微调试一下，把问题的具体范围缩小到哪里？如果代码正在到达header（）
语句，那么显然这是发生的适用逻辑路径。发生这种情况时，运行时值是什么？为什么您希望它们会有所不同？每次电子邮件文件（“email.txt”）不存在时，“header”都会执行。不，问题不在于我的验证不起作用，而是通过这种方式正确工作，我在问是否有一种方法可以不使用header来实现这一点谢谢你，但是代码是有效的，我知道如何让它更好地工作，谢谢你向我解释，但是我更关心的是使用action字段