PHP 表单验证号码字段

Question

我需要这个字段只允许输入数字，并且必须有11位数字输入到“手机号码”字段中，这是我创建的表格

<form name="myForm" id="userDetails" action="formProcess.php" onSubmit="return validateForm()" method="post">
  <fieldset class="custInf">
    <h3> User Details </h3>

    <label class="inputArea" for="fName">Forename :</label>
    <input type="text" name="forename" id="fname" placeholder="Enter First Name" maxlength="20" size="15"></input>

    <label class="inputArea" for="sName">Surname :</label>
    <input type="text" name="surname" id="surname" placeholder="Enter Last Name" maxlength="20" size="15"></input>

    <label class="inputArea" for="email">Email :</label>
    <input type="email" name="email" id="email" placeholder="Enter Email Address" maxlength="40" size="15" /></input>

    <label class="inputArea" for="hmph">Landline number :</label>
    <input type="tel" name="landLineTelNo" id="hmphone" placeholder="Enter Landline no." maxlength="11" size="15"></input>

    <label class="inputArea" for=" mobileTelNo">Mobile number :</label>
    <input type="tel" name=" mobileTelNo" id="mobile" placeholder="Enter Mobile no." maxlength="11" size="15"></input>

    <label class="inputArea" for="address">Postal Address :</label>
    <input type="text" name="postalAddress" id="address" placeholder="Enter House no." maxlength="25" size="15"></input>
  </fieldset>

  <fieldset class="contactType">
    <h3>
	How would you like to be contacted?
	</h3>
    <label class="radioBt" for="sms">SMS</label>
    <input id="smsBut" type="radio" name="sendMethod" value="SMS"></input>

    <label class="radioBt" for="email">Email</label>
    <input type="radio" name="sendMethod" value="Email"></input>

    <label class="radioBt" for="post">Post</label>
    <input type="radio" name="sendMethod" value="Post"></input>
  </fieldset>

  <fieldset class="termsCon">
    <input type="checkbox" name="check" value="check" id="check" />I have read and agree to the Terms and Conditions and Privacy Policy</input>
  </fieldset>

  <input class="submitBut" type="submit" name="submitBut" value="Submit" </input>

这是我迄今为止创建的用于验证用户输入的 PHP `//确保用户输入所需的信息

$fname = $_REQUEST['forename'];
if (empty($fname)) {
die("<p>Enter a first name</p>\n");
}

$surname = $_REQUEST['surname'];
if (empty($surname)) {
die("<p>You must enter a surname</p>\n");
}

$email = $_REQUEST['email'];
if (empty($email)) {
die("<p>You need to enter an email</p>\n");
}

$hmphone = isset($_REQUEST['hmph']) ? $_REQUEST['hmph'] : null ;

$mobile = $_REQUEST['mobileTelNo'];
if (empty($mobile)) {
die("<p>Enter a Mobile Number</p>\n");
}

$address = $_REQUEST['postalAddress'];
if (empty($address)) {
die("<p>Enter your postal address</p>\n");
}

$sendMethod = $_REQUEST['sendMethod'];
if (empty($sendMethod)) {
die("<p>Please choose a contact option</p>\n");
}

$check = $_REQUEST['check'];
if (empty($check)) {
die("<p>Please select the Terms and Conditions to continue</p>\n");
}`

Answer 1

借助 html5 模式标签，您可以通过在相关输入字段中添加以下代码来在表单内进行模式匹配。有关模式标签的更多详细信息：http://www.w3schools.com/tags/att_input_pattern.asp

pattern="[0-9]{11}"

谢天谢地，在服务器端 php 检查非常相似！

$isValid = preg_match("/[0-9]{11}/", $formvalue);

$isValid 如果匹配则返回 true (1)，如果不匹配则返回 false (0)。

preg_match 通常对于自定义验证来说是一个非常有用的函数。这里有更多详细信息：http://php.net/manual/en/function.preg-match.php

Answer 2

如果你确定你的规则是正确的，你可以这样做：

if (empty($mobile) || preg_match('/^[0-9]{11}$/', $mobile) != 1 ) {
    die("<p>Enter a Mobile Number</p>\n");
}

来自docs：

preg_match() 如果模式匹配给定的主题，则返回 1，如果不匹配，则返回 0，如果发生错误，则返回 FALSE。

正则表达式解释：

• ^ 断言字符串开头的位置
• [0-9] 匹配下面列表中的单个字符
• 量词：{11} 正好 11 次
• 0-9 0 到 9 范围内的单个字符
• $ 在字符串末尾断言位置

Answer 3

你可以用这个来验证：

if(empty($number)) {
    echo '<p> Please enter a value</p>';
} else if(!is_numeric($number)) {
    echo '<p> Data entered was not numeric</p>';
} else if(strlen($number) != 11) {
    echo '<p> The number entered was not 6 digits long</p>';
}