在 model.php 文件中出现未捕获的参考错误

Posted 2023-02-25

【中文标题】在 model.php 文件中出现未捕获的参考错误

【英文标题】：Getting uncaught refrence error in model.php file

【发布时间】：2021-12-05 03:27:06

【问题描述】：

我想在 localhost 上运行一个 php 网站。我设置了服务器并导入了数据库，但出现以下错误...我从客户端 c_panel 公共 html 文件夹下载了网站并导出了数据库。我必须在前端进行更改并且我不知道 PHP（我是一名 Node.js 开发人员，所以如果你可以参考它来帮助我。）。我只想在本地启动网站，这样我就可以做前端的更改。我的 app/Models.php 中出现以下错误

致命错误：未捕获错误：无法在 /Applications/MAMP/htdocs/app/src/sb/Model.php:475 中静态调用非静态方法 SB\Response::redirect() 堆栈跟踪：#0 / Applications/MAMP/htdocs/app/src/sb/Model.php(12): SB\Model->db_error(Object(PDOException)) #1 /Applications/MAMP/htdocs/app/src/sb/DB.php( 21): SB\Model->__construct() #2 /Applications/MAMP/htdocs/app/src/sb/DB.php(28): SB\DB->__construct() #3 /Applications/MAMP/htdocs/ route/web.php(20): SB\DB::table('blogs') #4 /Applications/MAMP/htdocs/vendor/composer/autoload_real.php(66): require('/Applications/M... ') #5 /Applications/MAMP/htdocs/vendor/composer/autoload_real.php(56): composerRequire6b60b5a5888bbd230d022934044bba82('8dab41e234cc925...', '/Applications/M...') #6 /Applications/MAMP/htdocs/ vendor/autoload.php(7): ComposerAutoloaderInit6b60b5a5888bbd230d022934044bba82::getLoader() #7 /Applications/MAMP/htdocs/index.php(10): require_once('/Applications/M...') #8 main 抛出/Applications/MAMP/htdocs/app/src/sb/M odel.php 在第 475 行

Modal.php 文件：

<?php
namespace SB;
use PDO;
use PDOException;
class Model 
    private  $pdo = null;
    public function __construct() 
        try 
           $this->pdo = new PDO(DSN, DB_USER, DB_PASS, array(PDO::mysql_ATTR_INIT_COMMAND => 'SET NAMES utf8'));
           
         catch (PDOException $e) 
          $this->db_error($e);
        
    

    /**
     * Create table
     * @param string $table A name of table to insert into
     * @param string $data An associative array
     */

    function create_table($table, $data) 
        $sql = "CREATE TABLE IF NOT EXISTS $table (";
        $num = count($data);
        $sql .= "`_id` bigint(20) PRIMARY KEY NOT NULL AUTO_INCREMENT, ";
        for ($i = 0; $i < $num; $i++):
            $sql .= $data[$i] . ", ";
        endfor;
       $sql .= "`created_at` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP, ";
       $sql .="`updated_at` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP);";
        $this->pdo->exec($sql);
        return  '<big>This code was executed. Please check manually if no table is created for the database<big> <br> '.$sql ;
    

    /**
     * insert
     * @param string $table A name of table to insert into
     * @param string $data An associative array
     */
    public function add($table, $data) 
        ksort($data);
        $this->pdo->beginTransaction();
        $fieldNames = implode('`, `', array_keys($data));
        $fieldValues = ':' . implode(', :', array_keys($data));
        $sth = $this->pdo->prepare("INSERT INTO `$table` (`$fieldNames`) VALUES ($fieldValues)");

        foreach ($data as $key => $value) 
            $val = ltrim($value," ");
            $sth->bindValue(":$key", $val);
        

        $s = $sth->execute();
        $this->pdo->commit();
        return $s;
    

    /**
     * insert with get auto increment _id
     * @param string $table A name of table to insert into
     * @param string $data An associative array
     */
    public function addGetId($table, $data) 
        ksort($data);

        $fieldNames = implode('`, `', array_keys($data));
        $fieldValues = ':' . implode(', :', array_keys($data));
        $sth = $this->pdo->prepare("INSERT INTO `$table` (`$fieldNames`) VALUES ($fieldValues)");

        foreach ($data as $key => $value) 
            $val = ltrim($value," ");
            $sth->bindValue(":$key", $val);
        

        $res = $sth->execute();
        
        if($res) 
           return  $this->pdo->lastInsertId();
         else 
            return $res;
        
    

    /**
     * update
     * @param string $table A name of table to insert into
     * @param string $data An associative array
     * @param string $where the WHERE query part
     */
    public function modify($table, $data,$where,$where_data = []) 
        ksort($data);
      
        $fieldDetails = NULL;
        foreach ($data as $key => $value) 
            $fieldDetails .= "`$key`=:$key,";
        
        $fieldDetails = rtrim($fieldDetails, ',');
       
        $sth = $this->pdo->prepare("UPDATE `$table` SET $fieldDetails  $where");

        foreach ($data as $key => $value) 
            $val = ltrim($value," ");
            $val = rtrim($val," ");
            $sth->bindValue(":$key", $val);
        

        foreach ($where_data as $key => $value) 
            $sth->bindValue(":".$key, $value);
        

        return $sth->execute();
    

    /**
     * Fetch all
     * @param string $table A name of table to get all data
     * @param string $cols the WHERE query part
     * @param string $where the WHERE query part
     * @param string $type the return data type 
     */

     public function fetch_all($table,$cols = '*',$where = false, $type = null,$where_data = []) 
        $statement = '';

        if(!$where) 
            $statement = "SELECT $cols FROM $table";   
         else 
            $statement =  "SELECT $cols FROM $table $where";
        

        $pre = $this->pdo->prepare($statement);

        $pre->execute($where_data);


         if(gettype($type) == 'string') 
            $type = strtoupper($type);
         

        if(!$type || $type == 'NUM') 
            return $pre->fetchAll(PDO::FETCH_NUM);
        
        else if($type == 1 || $type == 'ASSOC')   
            return $pre->fetchAll(PDO::FETCH_ASSOC);
           else 
            return $pre->fetchAll(PDO::FETCH_OBJ);  
         
    

    /**
     * Fetch one
     * @param string $table A name of table to get all data
     * @param string $cols the WHERE query part
     * @param string $where the WHERE query part
     * @param string $type the return data type 
     */

    public function fetch_one($table,$cols = '*',$where = false, $type = null,$where_data = []) 
        if(!$where)
            $pre = $this->pdo->prepare("SELECT $cols FROM $table");

         else 
              $pre = $this->pdo->prepare("SELECT $cols FROM $table $where"); 
        
        $pre->execute($where_data);

        if(gettype($type) == 'string') 
            $type = strtoupper($type);
        

        if(!$type || $type == 'NUM')
            return $pre->fetch(PDO::FETCH_NUM);
        else if($type == 1 || $type == 'ASSOC' )
            return $pre->fetch(PDO::FETCH_ASSOC);
        else  
            return $pre->fetch(PDO::FETCH_OBJ);
      
    

    public function fetch_some($table, $cols, $where, $operator) 
        ksort($where);
                $fields = '';
                $count = count($where);
                $i = 0;
                foreach($where as $key=>$val):
                
                   if($i<$count-1)
                   $fields .= $key.' '.$operator.' :'. $key.', ' ;
                   else
                       $fields .= $key.' '.$operator.' :'. $key;
                    $i++;
                endforeach;
              
                $pre = $this->pdo->prepare("SELECT $cols FROM $table WHERE $fields");
                foreach ($where as $key => $value):
                    
                     $pre->bindValue(":$key", $value);
                 endforeach;
                 $pre->execute();
                 return $pre->fetch(PDO::FETCH_ASSOC); 
    
    
    /**
     * Fetch row
     * @param string $table A name of table to get all data
     * @param string $cols the WHERE query part
     */
    public function fetch_row($table, $cols = '*', $where = false, $operator = '=') 
        if(!$where)
            
        $pre = $this->pdo->prepare("SELECT $cols FROM $table");
        $pre->execute();
        return $pre->fetch(PDO::FETCH_ASSOC); 
        else
            if(!is_array($where))
                
               $pre = $this->pdo->prepare("SELECT $cols FROM $table $where");
               $pre->execute();
               return $pre->fetch(PDO::FETCH_ASSOC);  
             else 
                
               return $this->pdo->fetch_some($table, $cols, $where, $operator);
            
        
    
    
    /**
     * Fetch rows
     * @param string $table A name of table to get all data
     * @param string $cols the WHERE query part
     */
    public function fetch_rows($table, $cols = '*',$where = false) 
        if(!$where)
            $pre = $this->pdo->prepare("SELECT $cols FROM $table");
            
         else 
            $pre = $this->pdo->prepare("SELECT $cols FROM $table $where");
        
        $pre->execute();
        return $pre->fetchAll(PDO::FETCH_OBJ);
      
    
    
    public function fetch_one_assoc($table,$cols = '*',$where = false) 
        if(!$where)
            $pre = $this->pdo->prepare("SELECT $cols FROM $table");
         else 
            $pre = $this->pdo->prepare("SELECT $cols FROM $table $where");
        
        $pre->execute();
        return $pre->fetch(PDO::FETCH_ASSOC);
    

    public function fetch_one_object($table,$cols = '*',$where = false,$where_data = []) 
        if(!$where)
            $pre = $this->pdo->prepare("SELECT $cols FROM $table");
         else 
            $pre = $this->pdo->prepare("SELECT $cols FROM $table $where");
        
        if(!empty($where_data))
            $pre->execute($where_data);
        else
            $pre->execute();
        return $pre->fetch(PDO::FETCH_OBJ);
    

    public function fetch_all_assoc($table,$cols = '*',$where = false) 
        if(!$where) 
            $pre = $this->pdo->prepare("SELECT $cols FROM $table");
            
         else 
            $pre = $this->pdo->prepare("SELECT $cols FROM $table $where");
        
        $pre->execute();
        return $pre->fetchAll(PDO::FETCH_ASSOC);
    

    public function fetch_all_object($table,$cols = '*',$where = false) 
        if(!$where)
            $pre = $this->pdo->prepare("SELECT $cols FROM $table");
            
         else 
e = $this->pdo->prepare("SELECT $cols FROM $table $where");
        
        $pre->execute();
        return $pre->fetchAll(PDO::FETCH_OBJ);
    

    /**
     * Fetch type
     * @param string $table A name of table to get all data
     * @param string $where the WHERE query part
     */
    public function fetch_type($table, $type = PDO::FETCH_OBJ, $limit = false,$cols = '*',$where = 1) 
      
        $pre = $this->pdo->prepare("SELECT $cols FROM $table $where");
        $pre->execute();
        if(!$limit)
          
        return $pre->fetchAll($type);
        else
           return $pre->fetch($type); 
        
    

    public function fetch_sql($sql,$type = PDO::FETCH_OBJ) 
        $pre = $this->pdo->prepare($sql);
        $pre->execute();
        return $pre->fetchAll($type);
      
    
    public function delete_row($table,$where,$operator = '=') 
     
        ksort($where);
                $fields = '';
                $count = count($where);
                $i = 0;
                foreach($where as $key=>$val):
                
                   if($i<$count-1)
                   $fields .= $key.' '.$operator.' ? AND ' ;
                    else 
                       $fields .= $key.' '.$operator.' ?';
                    $i++;
                endforeach;
              
                $pre = $this->pdo->prepare("DELETE FROM $table WHERE $fields");
                foreach ($where as $key => $value):
                     $a[] = $value;
                 endforeach;
                 
            return   $pre->execute($a);
       

       protected function deleteData($table,$where,$where_data=[]) 
       
        $pre = $this->pdo->prepare("DELETE FROM $table  $where");
        foreach ($where_data as $key => $value) 
            $pre->bindValue(":".$key, $value);
        
        return  $pre->execute();
       

       
       public function customeDate($date=false) 
           $date=date_create("$date");
            return date_format($date,"dS-M-Y");
       
       
       public function get_json($table) 
        $rows = $this->pdo->fetch_all_assoc($table);
        $out = "";
        
        foreach($rows as $row) 
            $cols = array_keys($row);
             if ($out != "") 
                $out .= ",";
                
            foreach($cols as $i=>$col)
           
                if($i==0)
            $out .= '"'.$col.'":"'  . $row[$col] . '",';
             else 
            $out .= '"'.$col.'":"'  . $row[$col] . '",';
               
        
            if($i==count($cols)-1) 
            $out .= '"'.$col.'":"'. $row[$col]     . '"';
        
            
        
        
        $out ='"records":['.$out.']';
        return  $out;
       

       protected function connection_close() 
         $this->pdo = null;
       


       private function db_error($e) 
         if(IS_DEBUGG):
            die('
                <br><h2><br>
                <center>!Config Error.<br>
                <small style="color:gray">Setup your .env file. Read Following Error</small>
                </center></h2>
                <h3>.env file variables</h3>
                <ul>
                <li>DB_HOST="Enter database host name"</li>
                <li>DB_USER="Enter here database user name"</li>
                <li>DB_PASS="enter Database Password"</li>
                <li>DB_NAME="enter Database Name"</li>
                <li>DB_DRIVER="DB DIRVER like `mysql`"</li>
                </ul>
                <br><div style="padding:50px;"><small style="color:lightgray"><pre>' . $e . '</pre></small></div>'
            );
        else:
           return Response::redirect('404');
        endif;
       

        public function fetch_qry($sql,$one=0) 
            $pre = $this->pdo->prepare($sql);
            $pre->execute();
            if($one)
                return $pre->fetch(PDO::FETCH_ASSOC);
            else
                return $pre->fetchAll(PDO::FETCH_ASSOC);
    

【问题讨论】：

检查 Response 类中的 redirect method 是静态方法还是非静态方法？如果缺少静态关键字，请在方法名称前添加static。

<?php namespace SB; class Response public static function back() echo '<script>window.history.back();</script>'; public static function go($a = -1) echo '<script>var x = history.length; if(x>3)window.history.go('.$a.'); elsewindow.location.href="'.URL.'"</script>'; public static function json($req = []) header('Content-type:Application/json'); echo json_encode($req); function redirect($endpoint) @header('Location:'.URL.$endpoint); 这是响应类

【参考方案1】：

更新这行代码

 public static function redirect($endpoint)         
   @header('Location:'.URL.$endpoint);     
 

或者，您可以创建此类的一个实例。

$response = new Response();

然后调用这个方法。

$response->redirect('404');