我正在獲取用戶輸入并將它們存儲在 XML 文件中。我正在讀取一個 XML 文件并將所有數據存儲在 JavaScript 數組中的標簽下。這樣，如果用戶兩次輸入相同的電子郵件地址，我可以讓他們知道該電子郵件已存在于 XML 文件中。這樣它就不會在 XML 文件中存儲相同的電子郵件兩次，因為用戶無法注冊。但由于某種原因，該功能無法正常工作。我真的需要一些幫助來解決這個問題。我的 XML 文件（storedata.xml）：<?xml version="1.0" encoding="UTF-8"?><document><data><fname>Sammy</fname><lname>Kim</lname><email2>[email protected]</email2><pass2>123</pass2></data><data><fname>Jimmy</fname><lname>Jabs</lname><email2>[email protected]</email2><pass2>abc</pass2></data></document>我的PHP代碼：<?phpif(isset($_REQUEST['ok'])) { $xml = new DOMDocument("1.0","UTF-8"); $xml->load("storedata.xml"); $rootTag = $xml->getElementsByTagName("document")->item(0); $dataTag= $xml->createElement("data"); $name1= $xml->createElement("fname",$_REQUEST['fname']); $name2= $xml->createElement("lname",$_REQUEST['lname']); $emailadd= $xml->createElement("email2",$_REQUEST['email2']); $pwd= $xml->createElement("pass2",$_REQUEST['pass2']); $dataTag->appendChild($name1); $dataTag->appendChild($name2); $dataTag->appendChild($emailadd); $dataTag->appendChild($pwd); $rootTag->appendChild($dataTag); $xml->save("storedata.xml"); }?>我的表單輸入：<input type="email" name="email1" placeholder="Email Adress" required="required" class="input-txt" style="width:40%;" id="email1"><input type="email" name="email2" placeholder="Confirm Email Adress" required="required" class="input-txt" style="width:40%;"id="email2"> 我的 JavaScript 代碼：<script>var first_email = document.getElementById("email1") , second_email = document.getElementById("email2") , password = document.getElementById("password") , confirm_password = document.getElementById("confirm_password");
1 回答
烙印99
TA貢獻1829條經驗 獲得超13個贊
你可以：
existingEmails檢索電子郵件后創建一個數組。然后在
checkEmailExists函數中您將檢查電子郵件是否在數組中。
<script>
var first_email = document.getElementById("email1")
, second_email = document.getElementById("email2")
, password = document.getElementById("password")
, confirm_password = document.getElementById("confirm_password");
//making an array of the email addresses from the XML file
var request = new XMLHttpRequest();
request.open("GET", "storedata.xml", false);
request.send();
var xml = request.responseXML;
var users = xml.getElementsByTagName("data");
const existingEmails = [];
for(var i = 0; i < users.length; i++) {
const emailTag = users[i].getElementsByTagName("email2");
const email = emailTag[0].childNodes[0].nodeValue;
existingEmails.push(email);
}
//checking if the email already exists
function checkEmailExists() {
if (existingEmails.includes(first_email.value)) {
first_email.setCustomValidity("This email address already exists! Please use another one.");
} else {
first_email.setCustomValidity('');
}
}
email1.onchange = checkEmailExists;
function validateMail() {
if(first_email.value != second_email.value) {
email2.setCustomValidity("Emails Don't Match");
} else {
email2.setCustomValidity('');
}
}
email2.onkeyup = validateMail;
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