无法通过表格

Question

读取未定义错误的属性'值'我有一个注册表单，我使用的是基于表单模板here。这是工作得很好，但我需要它也添加名字和姓氏和电话号码，所以我改成了这样：

 <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> 

我也不得不调整JavaScript的形式来接受新的值，这是现在这样的：

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; 
    } 

现在我得到了两个窗体页，并与“confirmpwd”字段关联的JavaScript页面上的错误“无法读取属性未定义的‘价值’”。该字段不是空的，并且名称没有从原始模板改变，唯一改变的是名字和姓氏以及电话被添加到表单中。

Answer 1

两件事情，您的功能没有匹配。首先，您将传递8个参数，不包括uid的值，以使函数等于9个输入。这些值最终不会按照您的预期排列，因此，当函数运行时，confirmpwd未定义，并且当您尝试获取未定义的属性时，会出现"Cannot read property 'value' of undefined"错误。

由于uid不是形式，你也没有验证username，我继续前进，并假设你试图验证username并相应地更新了你的函数。

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

您忘记了uid参数