未定义偏移：0笨

Question

当我仙请求这个页面，我得到了这样的错误

A PHP Error was encountered 

Severity: Notice 

Message: Undefined offset: 0 

Filename: models/mproduk.php 

Line Number: 116 

这是我的控制器

public function update($id=''){ 
     $data = array(); 
     $data['size'] = $this->msize->tampil(); 

     $data['eta']=$this->mproduk->berapakah_stoknya($id); 
     $data['cats'] = $this->mkategori->tampil(); 
     $data['prd'] = $this->mproduk->get_produk_detail($id); 
     $data['human'] = $this->mhuman->tampil(); 

     $html = array(); 
     $html['header']  = $this->load->view('secuser/header',null,true); 
     $html['kiri']  = $this->load->view('secuser/kiri',null,true); 
     $html['content'] = $this->load->view('secuser/product/update',$data,true); 
     $this->load->view('secuser/template',$html); 
    } 

这是我的模型

public function berapakah_stoknya($kodepro){ 
     $this->load->model('msize'); 
     $hahaha=$this->msize->tampil(); 

     foreach($hahaha as $wkwkwkw){ 
      $apa= $wkwkwkw['id']; 
      $sql= "select ukr_$apa from produk where kodeproduk = '".$kodepro. "'"; 
      $ggg= $this->db->query($sql)->result_array();  
      $return[]=array('stok'=>$ggg[0]["ukr_$apa"],'ukuran'=>$wkwkwkw['ukuran_produk'],'id_'=>$apa); 
     } 
     return $return; 
    } 

如果我使用error_reporting（0）该页面将循环显示为一些页面

我该如何解决这个错误？

Answer 1

您的数据库查询检索不到结果，因此$ggg为空，且没有0索引。

更改模型以检查是否找到任何结果。如果找到，请添加到$return阵列。

public function berapakah_stoknya($kodepro){ 
    $this->load->model('msize'); 
    $hahaha = $this->msize->tampil(); 
    $return = array(); 
    foreach($hahaha as $wkwkwkw){ 
     $apa= $wkwkwkw['id']; 
     $sql= "select ukr_$apa from produk where kodeproduk = '".$kodepro. "'"; 
     $ggg= $this->db->query($sql)->result_array(); 

     if(count($ggg)>0){ 
      $return[]=array('stok'=>$ggg[0]["ukr_$apa"],'ukuran'=>$wkwkwkw['ukuran_produk'],'id_'=>$apa); 
     } 
    } 
    return $return; 
} 

看来你只是预计只检索一行。所以你可以使用row_array。

public function berapakah_stoknya($kodepro){ 
    $this->load->model('msize'); 
    $hahaha = $this->msize->tampil(); 
    $return = array(); 
    foreach($hahaha as $wkwkwkw){ 
     $apa= $wkwkwkw['id']; 
     $sql= "select ukr_$apa from produk where kodeproduk = '".$kodepro. "'"; 
     $query = $this->db->query($sql); 

     if($query->num_rows() > 0){ 
      $ggg = $query->row_array(); 
      $return[]=array('stok'=>$ggg["ukr_$apa"],'ukuran'=>$wkwkwkw['ukuran_produk'],'id_'=>$apa); 
     } 
    } 
    return $return; 
}