[英]error on passing from controller to views in codeigniter?
i want to passing data from model to controller then to view this code explain it. 我想将数据从模型传递到控制器,然后查看此代码进行解释。
the model
该模型
public function get_all_college_name() {
$q = $this -> db -> query('select * from college');
if ($q -> num_rows() > 0) {
foreach ($q->result() as $row) {
$data[] = $row;
}
return $data;
}
}
the controller code
控制器代码
public function index() {
$this -> load -> model('retriver_data');
$data['rows'] = $this -> retriver_data -> get_all_college_name();
$this -> load -> view('home', $data);
//$this -> view_something('home', $data);
}
the view code
查看代码
<body>
<?php
foreach ($rows as $r) {
echo $r -> name;
}
?>
</body>
the error appears 错误出现
A PHP Error was encountered
遇到PHP错误
Severity: Warning
严重程度:警告
Message: Invalid argument supplied for foreach()
消息:为foreach()提供了无效的参数
Filename: views/home.php
文件名:views / home.php
Line Number: 8
行号:8
For CI, in my models I usually use: 对于CI,我通常在模型中使用:
if ($query->num_rows() == 0)
return FALSE;
return $query->result_array();
then if your view you'll check if the array is false before displaying 那么如果您的视图,您将在显示之前检查数组是否为假
<body>
<?php if ( ! $rows) : ?>
no data
<?php else: ?>
<?php foreach ($rows as $row): ?>
<?php print $row->name; ?>
<?php endforeach;?>
<?php endif; ?>
</body>
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