首页 \ 问答 \ Bootstrap'form-group has-error'无法使用php代码[关闭](Bootstrap 'form-group has-error' not working with php codes [closed])

Bootstrap'form-group has-error'无法使用php代码[关闭](Bootstrap 'form-group has-error' not working with php codes [closed])

 当我提交空字段时，输入不会变为红色并且不会打印错误消息。 当我使用此代码发送空字段时，如何显示错误消息并使输入框变为红色。  
<?php 

  if ( !empty($_POST)) {
    require 'db.php';
    // validation errors
    $fnameError     = null;
    $lnameError     = null;
    $ageError       = null;
    $genderError    = null;

    // post values
    $fname  = $_POST['fname'];
    $lname  = $_POST['lname'];
    $age    = $_POST['age'];
    $gender = $_POST['gender'];

    // validate input
    $valid = true;
    if(empty($fname)) {
      $fnameError = 'Please enter First Name';
      $valid = false;
    }

    if(empty($lname)) {
      $lnameError = 'Please enter Last Name';
      $valid = false;
    }

    if(empty($age)) {
      $ageError = 'Please enter Age';
      $valid = false;
    }

    if(empty($gender)) {
      $genderError = 'Please select Gender';
      $valid = false;
    }

    // insert data
    if ($valid) {
      $PDO->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
      $sql = "INSERT INTO users (fname,lname,age,gender) values(?, ?, ?, ?)";
      $stmt = $PDO->prepare($sql);
      $stmt->execute(array($fname,$lname,$age,$gender));
      $PDO = null;
      header("Location: index.php");
    }
  }
?>

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<link   href="css/bootstrap.min.css" rel="stylesheet">
<script src="js/bootstrap.min.js"></script>
</head>

<body>
  <div class="container">
    <div class="row">
      <div class="row">
        <h3>Create a User</h3>
      </div>

      <form method="POST" action="create.php">
        <div class="form-group <?php echo !empty($fnameError)?'has-error':'';?>">
          <label for="inputFName">First Name</label>
          <input type="text" class="form-control" required="required" id="inputFName" value="<?php echo isset($fname)?$fname:'';?>" name="fname" placeholder="First Name">
          <span class="help-block"><?php echo isset($fnameError)?$fnameError:'';?></span>
        </div>
        <div class="form-group <?php echo !empty($lnameError)?'has-error':'';?>">
          <label for="inputLName">Last Name</label>
          <input type="text" class="form-control" required="required" id="inputLName" value="<?php echo isset($lname)?$lname:'';?>" name="lname" placeholder="Last Name">
          <span class="help-block"><?php echo isset($lnameError)?$lnameError:'';?></span>
        </div>
        <div class="form-group <?php echo !empty($ageError)?'has-error':'';?>">
          <label for="inputAge">Age</label>
          <input type="number" required="required" class="form-control" id="inputAge" value="<?php echo isset($age)?$age:'';?>" name="age" placeholder="Age">
          <span class="help-block"><?php echo isset($ageError)?$ageError:'';?></span>
        </div>
        <div class="form-group <?php echo !empty($genderError)?'has-error':'';?>">
          <label for="inputGender">Gender</label>
          <select class="form-control" required="required" id="inputGender" name="gender" >
            <option></option>
            <option value="male" <?php echo isset($gender)?'selected':'';?>>Male</option>
            <option value="female" <?php echo isset($gender)?'selected':'';?>>Female</option>
          </select>
          <span class="help-block"><?php echo isset($genderError)?$genderError:'';?></span>

        </div>

        <div class="form-actions">
          <button type="submit" class="btn btn-success">Create</button>
          <a class="btn btn btn-default" href="index.php">Back</a>
        </div>
      </form>

    </div> <!-- /row -->
  </div> <!-- /container -->

</body>
</html>

Inputs don't turn red and does not print the error messages when I'm submitting empty fields. How can I show the error messages and make the input boxes turn red when I'm sending empty fields with this code. 
<?php 

  if ( !empty($_POST)) {
    require 'db.php';
    // validation errors
    $fnameError     = null;
    $lnameError     = null;
    $ageError       = null;
    $genderError    = null;

    // post values
    $fname  = $_POST['fname'];
    $lname  = $_POST['lname'];
    $age    = $_POST['age'];
    $gender = $_POST['gender'];

    // validate input
    $valid = true;
    if(empty($fname)) {
      $fnameError = 'Please enter First Name';
      $valid = false;
    }

    if(empty($lname)) {
      $lnameError = 'Please enter Last Name';
      $valid = false;
    }

    if(empty($age)) {
      $ageError = 'Please enter Age';
      $valid = false;
    }

    if(empty($gender)) {
      $genderError = 'Please select Gender';
      $valid = false;
    }

    // insert data
    if ($valid) {
      $PDO->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
      $sql = "INSERT INTO users (fname,lname,age,gender) values(?, ?, ?, ?)";
      $stmt = $PDO->prepare($sql);
      $stmt->execute(array($fname,$lname,$age,$gender));
      $PDO = null;
      header("Location: index.php");
    }
  }
?>

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<link   href="css/bootstrap.min.css" rel="stylesheet">
<script src="js/bootstrap.min.js"></script>
</head>

<body>
  <div class="container">
    <div class="row">
      <div class="row">
        <h3>Create a User</h3>
      </div>

      <form method="POST" action="create.php">
        <div class="form-group <?php echo !empty($fnameError)?'has-error':'';?>">
          <label for="inputFName">First Name</label>
          <input type="text" class="form-control" required="required" id="inputFName" value="<?php echo isset($fname)?$fname:'';?>" name="fname" placeholder="First Name">
          <span class="help-block"><?php echo isset($fnameError)?$fnameError:'';?></span>
        </div>
        <div class="form-group <?php echo !empty($lnameError)?'has-error':'';?>">
          <label for="inputLName">Last Name</label>
          <input type="text" class="form-control" required="required" id="inputLName" value="<?php echo isset($lname)?$lname:'';?>" name="lname" placeholder="Last Name">
          <span class="help-block"><?php echo isset($lnameError)?$lnameError:'';?></span>
        </div>
        <div class="form-group <?php echo !empty($ageError)?'has-error':'';?>">
          <label for="inputAge">Age</label>
          <input type="number" required="required" class="form-control" id="inputAge" value="<?php echo isset($age)?$age:'';?>" name="age" placeholder="Age">
          <span class="help-block"><?php echo isset($ageError)?$ageError:'';?></span>
        </div>
        <div class="form-group <?php echo !empty($genderError)?'has-error':'';?>">
          <label for="inputGender">Gender</label>
          <select class="form-control" required="required" id="inputGender" name="gender" >
            <option></option>
            <option value="male" <?php echo isset($gender)?'selected':'';?>>Male</option>
            <option value="female" <?php echo isset($gender)?'selected':'';?>>Female</option>
          </select>
          <span class="help-block"><?php echo isset($genderError)?$genderError:'';?></span>

        </div>

        <div class="form-actions">
          <button type="submit" class="btn btn-success">Create</button>
          <a class="btn btn btn-default" href="index.php">Back</a>
        </div>
      </form>

    </div> <!-- /row -->
  </div> <!-- /container -->

</body>
</html>

原文：https://stackoverflow.com/questions/30837053

更新时间：2024-03-05 12:03

最满意答案

 问题在于你的配置  
@Bean
public SessionLocaleResolver sessionLocaleResolver() {
    SessionLocaleResolver localeResolver = new SessionLocaleResolver();
    localeResolver.setDefaultLocale(new Locale("en", "US"));
    return localeResolver;
}
 
 这将构造名为sessionLocaleResolver的bean，但DispatcherServlet查找名称为localeResolver的bean。 如果未检测到它，它将使用默认值，即AcceptHeaderLocaleResovler 。  
 该解决方案非常简单，将您的方法重命名为localeResolver或在@Bean注释中包含name属性。  
@Bean
public LocaleResolver localeResolver() { ... }
 
 要么  
@Bean(name="localeResolver")

The problem lies in your configuration 
@Bean
public SessionLocaleResolver sessionLocaleResolver() {
    SessionLocaleResolver localeResolver = new SessionLocaleResolver();
    localeResolver.setDefaultLocale(new Locale("en", "US"));
    return localeResolver;
}
 
This constructs a bean with the name sessionLocaleResolver however the DispatcherServlet  looks for a bean with the name localeResolver. If this isn't detected it will use the default, which is a AcceptHeaderLocaleResovler. 
The solution is quite simple rename your method to localeResolver or include a name attribute in the @Bean annotation. 
@Bean
public LocaleResolver localeResolver() { ... }
 
or  
@Bean(name="localeResolver")

Bootstrap'form-group has-error'无法使用php代码[关闭](Bootstrap 'form-group has-error' not working with php codes [closed])

最满意答案

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