註冊系統不工作在PHP和MySQL [致命錯誤]

Question

我正在寫一個代碼，用於在mysql數據庫上註冊表單和數據查詢。在註冊表單是在這裏： -

<form action="index.php" method="POST" enctype="multipart/form-data"> 

    First Name:<input type="text" name="name"><br> 

    Last Name : <input type="text" name="lname"><br> 

    Username : <input type="text" name="uname"><br> 

    Password : <input type="text" name="password"><br> 

    age : <input type="text" name="age"><br> 

    Email : <input type="text" name="email"><br> 

    Chose_Images : <input type="file" name="images"><br> 

    <input type="submit" name="submit"> 

</form> 

現在，index.php文件是在這裏： -

<?php 

require'store.inc.php'; 

if (isset($_POST['submit'])) { 
    # code... 


$first_name = mysql_real_escape_string(htmlentities($_POST['name'])); 

$last_name = mysql_real_escape_string(htmlentities($_POST['lname'])); 

$username = mysql_real_escape_string(htmlentities($_POST['uname'])); 

$password = mysql_real_escape_string(htmlentities($_POST['password'])); 

$password_hash = md5($password); 

$age = mysql_real_escape_string(htmlentities($_POST['age'])); 

$email = mysql_real_escape_string(htmlentities($_POST['email'])); 

    if (isset($first_name) && isset($last_name) &&isset($username) &&isset($password) &&isset($age) &&isset($email)) { 
     # code... 

      if (!empty($first_name) && !empty($last_name) &&!empty($username) &&!empty($password) &&!empty($age) &&!empty($email)) { 


     $errors = array(); 



// cheking string limit............ 

     if (strlen($first_name) > 50) { 
      # code... 

      $errors[] = 'PLease dont cross the strign limit in first name colum'.'<br>'; 

     }elseif (strlen($last_name) > 50) { 
      # code... 

      $errors[] = 'PLease dont cross the strign limit in first name colum'.'<br>'; 

     }elseif (strlen($username) > 50) { 
      # code... 
      $errors[] = 'Your username is out of string limit'.'<br>'; 

     }elseif (strlen($password) > 40) { 
      # code... 

      $errors[] = 'Your password is too long'; 

     }elseif (strlen($age) > 50) { 
      # code... 
      $errors[] = 'you can not register into the site'; 


     }elseif (strlen($email) > 50) { 
      # code... 

      $errors[] = 'You are out of Email string limit'; 

     } 

// coding of the first function start... 
     function connect_database(){ 

      $server_connect = mysql_connect('localhost','root',''); 

      $server_database = mysql_select_db('reg_log',$server_connect); 

          if ($server_connect && $server_database) { 
           # code... 
              return true; 
           } else { 
             return false; 
               } 
              } 

// coding of the first function END........... 


// coding of the function check_data() start... 
function check_data(){ 

    global $username; 
     connect_database(); 

     $select = "SELECT `username` FROM `users` WHERE `username` = '$username'"; 

     $select_query = mysql_query($select); 

     $num_rows = mysql_num_rows($select_query); 

     if ($num_rows == 1) { 
      # code... 
      return false; 
     } elseif ($num_rows == 0) { 
      # code... 
      return true; 
     } 

} 

//coding of the function End.................. 

// *********Varibles about Images which will be Global varibles..........Using addslashes for security 

$image = addslashes(file_get_contents($_FILES['images']['tmp_name'])); 

$image_name = addslashes($_FILES['images']['name']); 

$image_size = addslashes(getimagesize($_FILES['images']['tmp_name'])); 


//*******Varible Stored..................................................... 

//Coding of Inserting Data in the database...By this function code will insert data in to database after all check........... 

function insert_data(){ 

global $first_name,$last_name,$username,$password_hash,$age,$email,$images; 
    connect_database(); 

    $insert = "INSERT INTO users VALUES('','$first_name','$last_name','$username','$password_hash','$age','$email','$images')"; 

    $insert_query = mysql_query($insert); 

    if ($insert_query) { 
     # code... 
     return true; 
    } 
} 


     } 

     } 

} 
    if (empty($errors)) { 
     # code... 

     if (check_data()) { 
      # code... 
      insert_data(); 
     } 

    }else{ 

     foreach ($errors as $error) { 
      # code... 
      echo $error.'<br>'; 
     } 
      } 





?> 

這兩個文件都相同。我的意思是，這兩個代碼都存儲在同一個名爲'index.php'的文件中。該 'store.inc.php' 僅包含： -

$server_connect = mysql_connect('localhost','root',''); 

$server_database = mysql_select_db('reg_log',$server_connect); 

現在，當我在我的瀏覽器通過本地主機打開的index.php，它顯示錯誤： -

Fatal error: Call to undefined function check_data() in C:\xampp\htdocs\oop\user_reg\index.php on line 145 

但是，我已經有一個名爲check_data（）的函數，並且該函數本身運行良好。但是我的代碼發生了不好的事情。我想修復它並無法做到。我很需要你們的幫助。謝謝。

Answer 1

你正在使用這個函數check_data()下的一個if，然後你從if外調用它。

嘗試此行

 if (empty($errors)) { 
    # code... 

    if (check_data()) {