PHP表單驗證編號字段

Question

我需要此字段僅允許將數字輸入到該字段中，並且必須在“移動電話號碼”字段中輸入11位數字，這是我創建的表格

 <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> 

這是我到目前為止創建的用於驗證用戶輸入`//確保用戶輸入所需信息的PHP

$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

如果您確定規則正確，則可以執行以下操作：

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

從文檔 ：

如果模式匹配給定的主題，則preg_match（）返回1；如果不匹配，則返回0；如果發生錯誤，則返回FALSE。

正則表達式說明：

• ^在字符串開頭的斷言位置
• [0-9]匹配以下列表中存在的單個字符
• 量詞： {11}恰好11次
• 0-9介於0到9之間的單個字符
• $在字符串末尾的斷言位置

Answer 2

您可以通過在相關輸入字段中添加以下代碼來對表單進行模式匹配，這要歸功於html5模式標簽。 有關模式標簽的更多詳細信息， 請參見 ： http : //www.w3schools.com/tags/att_input_pattern.asp

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

謝天謝地，它在服務器端php上非常相似！

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

$ isValid如果匹配則返回true（1），否則返回false（0）。

通常，preg_match是一個非常有用的函數，用於自定義驗證。 此處有更多詳細信息： http : //php.net/manual/zh/function.preg-match.php

Answer 3

您可以通過以下方式進行驗證：

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>';
}