無法通過表格

Question

讀取未定義錯誤的屬性'值'我有一個註冊表單，我使用的是基於表單模板here。這是工作得很好，但我需要它也添加名字和姓氏和電話號碼，所以我改成了這樣：

 <form method="post" name="registration_form" action="<?php echo esc_url($_SERVER['PHP_SELF']); ?>"> 
      First Name: <input type='text' name='firstname' id='firstname' /><br> 
      Last Name: <input type='text' name='lastname' id='lastname' /><br> 
      Phone: <input type='tel' name='phone' id='phone' /><br> 
      Username: <input type='text' name='username' id='username' /><br> 
      Email: <input type="text" name="email" id="email" /><br> 
      Password: <input type="password" 
          name="password" 
          id="password"/><br> 
      Confirm password: <input type="password" 
            name="confirmpwd" 
            id="confirmpwd" /><br> 
      <input type="button" 
        value="Register" 
        onclick="return regformhash(this.form, 
            this.form.firstname, 
            this.form.lastname, 
            this.form.phone, 
            this.form.username, 
            this.form.email, 
            this.form.password, 
            this.form.confirmpwd);" /> 
     </form> 

我也不得不調整JavaScript的形式來接受新的值，這是現在這樣的：

function regformhash(form, uid, firstname, lastname, phone, username, email, password, confirmpwd) { 
    // Check each field has a value 
    if (uid.value == '' || firstname.value == '' || lastname.value == '' || phone.value == '' || email.value == '' || password.value == '' || confirmpwd.value == '') { 
     alert('You must provide all the requested details. Please try again'); 
     return false; 
    } 

現在我得到了兩個窗體頁，並與「confirmpwd」字段關聯的JavaScript頁面上的錯誤「無法讀取屬性未定義的‘價值’」。該字段不是空的，並且名稱沒有從原始模板改變，唯一改變的是名字和姓氏以及電話被添加到表單中。

Answer 1

兩件事情，您的功能沒有匹配。首先，您將傳遞8個參數，不包括uid的值，以使函數等於9個輸入。這些值最終不會按照您的預期排列，因此，當函數運行時，confirmpwd未定義，並且當您嘗試獲取未定義的屬性時，會出現"Cannot read property 'value' of undefined"錯誤。

由於uid不是形式，你也沒有驗證username，我繼續前進，並假設你試圖驗證username並相應地更新了你的函數。

function regformhash(form, firstname, lastname, phone, username, email, password, confirmpwd) { 
 
    // Check each field has a value 
 
    if (username.value == '' || firstname.value == '' || lastname.value == '' || phone.value == '' || email.value == '' || password.value == '' || confirmpwd.value == '') { 
 
     alert('You must provide all the requested details. Please try again'); 
 
    } 
 
    return false; 
 
}

<form method="post" name="registration_form" action="<?php echo esc_url($_SERVER['PHP_SELF']); ?>"> 
 
    First Name: <input type='text' name='firstname' id='firstname' /><br> 
 
    Last Name: <input type='text' name='lastname' id='lastname' /><br> 
 
    Phone: <input type='tel' name='phone' id='phone' /><br> 
 
    Username: <input type='text' name='username' id='username' /><br> 
 
    Email: <input type="text" name="email" id="email" /><br> 
 
    Password: <input type="password" 
 
         name="password" 
 
         id="password"/><br> 
 
    Confirm password: <input type="password" 
 
           name="confirmpwd" 
 
           id="confirmpwd" /><br> 
 
    <input type="button" 
 
      value="Register" 
 
      onclick="return regformhash(this.form, 
 
          this.form.firstname, 
 
          this.form.lastname, 
 
          this.form.phone, 
 
          this.form.username, 
 
          this.form.email, 
 
          this.form.password, 
 
          this.form.confirmpwd);" /> 
 
</form>

Answer 2

您忘記了uid參數