我想设置landLineTelNo是一个整数，必须包含12位。。。这是我的php表单代码。。。。
<?php
// Start the session
session_start();
?>
<!DOCTYPE html>
<html lang="en">
<head>
<title>Page Title Goes Here</title>
<meta charset="utf-8">
<link rel="stylesheet" type="text/css" href="form1.css"/>
</head>
<body>
<?php
//define variable and set to empty value
$forenameErr = $surnameErr = $emailErr = $postalAddressErr = $landLineTelNoErr = $mobileTelNoErr = $sendMethodErr = "";
$valid = true;
// if forename is null , make it null , else test_input()
$forename = empty($_POST["forename"]) ? NULL : test_input($_POST["forename"]);
// if surname is null , make it null , else test_input()
$surname = empty($_POST["surname"]) ? NULL : test_input($_POST["surname"]);
// if postalAddress is null , make it null , else test_input()
$postalAddress = empty($_POST["postalAddress"]) ? NULL : test_input($_POST["postalAddress"]);
// if landLineTelNo is null , make it null , else test_input()
$landLineTelNo = empty($_POST["landLineTelNo"]) ? NULL : test_input($_POST["landLineTelNo"]);
// if mobileTelNo is null , make it null , else test_input()
$mobileTelNo = empty($_POST["mobileTelNo"]) ? NULL : test_input($_POST["mobileTelNo"]);
//email
$email = empty($_POST["email"]) ? NULL : test_input($_POST["email"]);
// if sendMethod is null , make it null , else test_input()
$sendMethod = empty($_POST["sendMethod"]) ? NULL : test_input($_POST["sendMethod"]);
if (isset($_POST["submit"])){
//check forename
if($forename === NULL) {
//forename is empty
$forenameErr = "Forename is required";
$valid = false;
} else {
//check characters
if (!preg_match("/^[a-zA-Z ]*$/",$forename)) {
$forenameErr = "Only letters and white space allowed";
$valid = false;
}
}
//check surname
if($surname === NULL){
//surname is empty
$surnameErr = "Surname is required";
$valid = false; //false
} else {
//check charaters
if (!preg_match("/^[a-zA-Z ]*$/",$surname)) {
$surnameErr = "Only letters and white space allowed";
$valid = false;
}
}
//check address
if (!preg_match("/^[a-zA-Z0-9'-'',. ]*$/", $postalAddress)) {
// check characters
$postalAddressErr = "Invalid Postal Address";
$valid = false;//false
}
// check if invalid telephone number added
if (!preg_match("/^$|^[0-9]{12}$/",$landLineTelNo)) {
//check number
$landLineTelNoErr = "Invalid telephone number entered";
$valid = false;//false
}
//check valid mobiel tel no
if (!preg_match("/^$|^[0-9]{11}$/",$mobileTelNo)) {
//check number
$mobileTelNoErr = "Invalid telephone number entered";
$valid = false;//false
}
//check valid email
if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
$emailErr = "Invalid email format";
$valid = false;//false
}
//check sendMethod
if($sendMethod === NULL){
//send method is empty
$sendMethodErr = "Contact method is required";
$valid = false; //false
} else {
$sendMethod = test_input($_POST["sendMethod"]);
}
//if valid then redirect
if($valid){
$_SESSION['forename'] = $forename;
$_SESSION['surname'] = $surname;
$_SESSION['email'] = $email;
$_SESSION['postalAddress'] = $postalAddress;
$_SESSION['landLineTelNo'] = $landLineTelNo;
$_SESSION['mobileTelNo'] = $mobileTelNo;
$_SESSION['sendMethod'] = $sendMethod;
header('Location: userdetail.php');
exit();
}
} else{
//user did not submit form!
}
//check
function test_input($data) {
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}
?>
<div id="wrapper">
<h1>Welcome to Chollerton Tearoom! </h1>
<nav>
<ul>
<li><a href="index.html">Home</a></li>
<li><a href="findoutmore.html">Find out more</a></li>
<li><a href="offer.html">Offer</a></li>
<li><a href="credit.html">Credit</a></li>
<li><a href="#">Admin</a></li>
<li><a href="wireframe.html">WireFrame</a></li>
</ul>
</nav>
<form id = "userdetail" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>" method="POST">
<fieldset id="aboutyou">
<legend id="legendauto">user information</legend>
<p>
<label for="forename">Forename: </label>
<input type="text" name="forename" id="forename" value="<?php echo $forename;?>">
<span class="error">* <?php echo $forenameErr;?></span>
</p>
<p>
<label for="surname">Surname:</label>
<input type="text" name="surname" id="surname" value="<?php echo $surname;?>">
<span class="error">* <?php echo $surnameErr;?></span>
</p>
<p>
<label for="postalAddress">Postal Address:</label>
<input type="text" name="postalAddress" id="postalAddress" value="<?php echo $postalAddress;?>">
<span class="error"> <?php echo $postalAddressErr;?></span>
</p>
<p>
<label for="landLineTelNo">Landline Telephone Number:</label>
<input type="text" name="landLineTelNo" id="landLineTelNo" value="<?php echo $landLineTelNo;?>" >
<span class="error"> <?php echo $landLineTelNoErr;?></span>
</p>
<p>
<label for="mobileTelNo">Moblie:</label>
<input type="text" name="mobileTelNo" id="mobileTelNo" value="<?php echo $mobileTelNo;?>" >
<span class="error"> <?php echo $mobileTelNoErr;?></span>
</p>
<p>
<label for="email">E-mail:</label>
<input type="text" name="email" id="email" value="<?php echo $email;?>">
<span class="error"> </span> <?php echo $emailErr;?> </span>
</p>
<fieldset id="future">
<legend>Lastest news</legend>
<p>
Choose the method you recommanded to recevive the lastest information
</p>
<br>
<input type="radio" name="sendMethod" id="sendMethod" <?php if (isset($sendMethod) && $sendMethod=="email") echo "checked";?> value="email">
Email
<input type="radio" name="sendMethod" id="sendMethod" <?php if (isset($sendMethod) && $sendMethod=="post") echo "checked";?> value="post">
Post
<input type="radio" name="sendMethod" id="sendMethod" <?php if (isset($sendMethod) && $sendMethod=="SMS") echo "checked";?> value="SMS">
SMS
<span class="error">* <?php echo $sendMethodErr;?></span>
</fieldset>
<p><span class="error">* required field.</span></p>
<input type="checkbox" name="checkbox" value="check" id="agree" />
I have read and agree to the Terms and Conditions and Privacy Policy
<p>
<input type="submit" name="submit" value="submit" >
</p>
</form>
</fieldset>
</form>
</div>
</body>
</html>
这是我的redodata.php代码，用于获取数据。。。
<?php
session_start();
$forename = $_SESSION['forename'];
$surname = $_SESSION['surname'];
$email = $_SESSION['email'];
$postalAddress = $_SESSION['postalAddress'];
$landLineTelNo = $_SESSION['landLineTelNo'];
$mobileTelNo = $_SESSION['mobileTelNo'];
$sendMethod = $_SESSION['sendMethod'];
echo "<h1>Successfull submission :</h1>";
echo "<p>Forename : $forename <p/>";
echo "<p>Surname : $surname <p/>";
if($_SESSION['postalAddress']==NULL)
{echo "postalAddress:NULL";}
else {echo "<p>PostalAddress : $postalAddress </p>";}
if($_SESSION['email']==NULL)
{echo "email:NULL";}
else {echo "<p>email : $email</p>";}
if($_SESSION['landLineTelNo']==NULL)
{echo "landLineTelNo:NULL";}
else {echo "<p>landLineTelNo : $landLineTelNo </p>";}
if($_SESSION['mobileTelNo']==NULL)
{echo "mobileTelNo:NULL";}
else {echo "<p>mobileTelNo : $mobileTelNo </p>";}
echo "<p>sendMethod : $sendMethod </p>";
?>
我尝试过"/^[0-9]｛12｝$/"，但当它为空时无法提交表单。。。。它假设在空的时候也提交。。。。当我尝试"/^[0-9]*$/"时，一切都正常。。。。那么我如何将landLineTelNo设置为12位，否则它无法提交表格。。。如果表格为空，它可以提交。。。。
下面的正则表达式检查空值或原始正则表达式。
/^$|^[0-9]{12}$/
希望这能有所帮助。
如果它是空的，为什么不简单地尝试一下？
if($_SESSION['landLineTelNo'] === null){
echo "<p>landLineTelNo:NULL<p/>";
} elseif (is_empty($_SESSION['landLineTelNo'])) {
echo "<p>landLineTelNo:EMPTY<p/>";
} else {
echo "<p>landLineTelNo : $landLineTelNo <p/>";
}
希望这能帮助
您可以这样做：
// Make sure landLineTelNo is set
// If landLineTelNo is empty then that's OK
if (isset($_POST["landLineTelNo"]) && $_POST["landLineTelNo"] !== '') {
// Check if non-digits were provided
if (!ctype_digit($_POST['landLineTelNo'])) {
$landLineTelNoErr = "Must contain only digits";
$valid = false;
}
// Check if exactly 12 digits were provided
elseif (strlen($_POST['landLineTelNo']) !== 12) {
$landLineTelNoErr = "Must contain 12 digits";
$valid = false;
}
}