php - 遇到 PHP 错误

Question

// Severity: Notice  Message: Use of undefined constant errors - assumed 'errors'         Filename: views/register_user.php  Line Number: 8 

//I get an error(above) after I register but the good news is it displays validation errors().

//users.php
$this->load->library('form_validation');
    $this->form_validation->set_rules($config);     
    if($this->form_validation->run() == FALSE){
         $data['errors']=validation_errors();   
    }
//register_user.php
<?php if($errors = validation_errors()){ 
echo $errors; ?>
<div style="background:red;color:white;">
<?=errors?>
</div>
<? } ?>

Answer 1

你犯了一个语法错误..在错误变量之前错过了 $..

尝试这个

$this->load->library('form_validation');
    $this->form_validation->set_rules($config);     
    if($this->form_validation->run() == FALSE){
         $data['errors']=validation_errors();   
    }
//register_user.php
<?php if($errors == validation_errors()){ 
echo $errors; ?>
<div style="background:red;color:white;">
<?=$errors?>
</div>
<? } ?>

Answer 2

<?=errors?>是不正确的。

尝试在前面放一个 $ 符号，让 PHP 知道它是一个变量，而不是常量：

<?=$errors?>

Answer 3

将代码更改为以下

<?php 
$errors = validation_errors();
if($errors){ 
 ?>
<div style="background:red;color:white;">
<?=$errors?>
</div>
<? } ?>