我在php中制作了一个程序,它运行正常。现在,我想使用Codeigniter制作该程序。
这是我的旧程序:
<?php include('connect.php');
?>
<html>
<head>
<script src="http://code.jquery.com/jquery-2.1.1.min.js"></script>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap-theme.min.css" integrity="sha384-rHyoN1iRsVXV4nD0JutlnGaslCJuC7uwjduW9SVrLvRYooPp2bWYgmgJQIXwl/Sp" crossorigin="anonymous">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
</head>
<body>
<div class="container">
<div class="row">
<div class="col-md-12">
<a href="estudiante.php"><button type="button" class="btn btn-success">AGREGAR</button></a><br /><br />
<h2 align="center">TABLA:MATERIAS</h2>
<input id="busqueda_tabla" type="text">
<table class="table table-hover" align="center" border="1" cellspacing="0" cellpadding="0" width="700" id="tabla_busqueda">
<thead>
<th>id</th>
<th>Carrera</th>
<th>Nombre</th>
<th>Descripcion</th>
<th>Carga horaria (hs)</th>
<th>Accion</th>
</thead>
<?php
$sql=mysql_query("SELECT s.*, c.nombre AS carrera FROM materias s LEFT JOIN carreras c ON s.carrera_id=c.id");//ESTA FUNCION ME AYUDA A ACOMODAR LAS CARRERAS EN LA COLUMNA "CARRERA" DE LA TABLA
$i=1;
while($row=mysql_fetch_array($sql)){
echo "<tr>
<td>".$i."</td>
<td>".$row['carrera']."</td>
<td>".$row['nombre']."</td>
<td>".$row['descripcion']."</td>
<td>".$row['carga_horaria']."</td>
<td align='center'>
<a href='editar.php?editar=1&iden=".$row['id']."'><button type='button' class='btn btn-primary'>EDITAR</button></a> |
<a href='borrar.php?borrar=1&iden=".$row['id']."'><button type='button' class='btn btn-danger'>BORRAR</button></a>
</td>
</tr>";
$i++;
}
?>
</table>
</div>
</div>
</div>
</body>
</html>
并且,&#34; connect.php&#34;文件
<?php
$con=mysql_connect('localhost','root','root')OR die('error : '.mysql_error());
$db=mysql_select_db('desafio');
if($db){
echo '';
}else{
echo 'Error :' .mysql_error();
}
?>
这是我的Codeigniter代码:
我的观点&#34;文件:
<?php include('header.php'); ?>
<?php include('footer.php'); ?>
<div class="container">
<div class="row">
<div class="col-md-12">
<h2 align="center">TABLA:MATERIAS</h2>
<input id="busqueda_tabla" type="text">
<table class="table table-hover" align="center" border="1" cellspacing="0" cellpadding="0" width="700" id="tabla_busqueda">
<thead>
<th>id</th>
<th>Carrera</th>
<th>Nombre</th>
<th>Descripcion</th>
<th>Carga horaria (hs)</th>
<th>Accion</th>
</thead>
<?php
$i=1;
foreach($records as $record) {
echo "<tr>
<td>".$i."</td>
<td>".$record->carrera."</td>
<td>".$record->nombre."</td>
<td>".$record->descripcion."</td>
<td>".$record->carga_horaria."</td>
<td align='center'>
<a href='editar.php?editar=1&iden=".$record->id."'><button type='button' class='btn btn-primary'>EDITAR</button></a> |
<a href='borrar.php?borrar=1&iden=".$record->id."'><button type='button' class='btn btn-danger'>BORRAR</button></a>
</td>
</tr>";
}
$i++;
?>
</table>
</div>
</div>
</div>
这是我的Crudmodel文件:
<?php
Class Crudmodel extends CI_Model{
public function getRecords(){
$this->db->select('s.*, c.nombre AS carrera')
->from('materias s')
->join('carreras c', 's.carrera_id = c.id', 'left');
$q = $this->db->get();
if($q -> num_rows() > 0){
return $q->result();
}
return false;
}
}
?>
控制器文件:
<?php
class Home extends CI_Controller{
public function index(){
$this->load->model('Crudmodel');
$data['records'] = $this->Crudmodel->getRecords();
$this->load->view('home', $data['records']);
}
}
?>
但它不起作用,我得到了这个错误:
https://i.gyazo.com/607303edcd861d0a2257611c925f3e6e.png
https://i.gyazo.com/eb9d833bf5d0818db2906ec1447550c0.png
https://i.gyazo.com/c5bb77d50315888a375a1e775a5ad68c.png
不知道该怎么做:/
答案 0 :(得分:0)
主要原因是数据库连接。首先,检查database.php文件中的数据库连接。如果一切都很好,请加载您的数据库。 您可以通过两种方式加载数据库:
在自动加载文件中:自动加载库&gt;传递数组中的数据库。
- 醇>
或者在模型中,请在构造函数中加载:$ this-&gt; load-&gt; db
提前致谢。
答案 1 :(得分:0)
<?php
class Home extends CI_Controller{
public function index(){
$this->load->model('Crudmodel');
$data['records'] = $this->Crudmodel->getRecords();
$this->load->view('header');
$this->load->view('home', $data);
$this->load->view('footer');
}
}
在codeigniter中加载数据库
https://www.codeigniter.com/user_guide/database/configuration.html
配置/ database.php中
$db['default'] = array(
'dsn' => '',
'hostname' => 'localhost',
'username' => 'root',
'password' => '****',
'database' => 'database_name',
'dbdriver' => 'mysqli',
'dbprefix' => '',
'pconnect' => TRUE,
'db_debug' => TRUE,
'cache_on' => FALSE,
'cachedir' => '',
'char_set' => 'utf8',
'dbcollat' => 'utf8_general_ci',
'swap_pre' => '',
'encrypt' => FALSE,
'compress' => FALSE,
'stricton' => FALSE,
'failover' => array()
);
然后自动加载它。也可以自动加载一些库和帮助程序。完整阅读本手册。
配置/ autoload.php
$autoload['libraries'] = array('database');
这里也有一些好的阅读
https://www.codeigniter.com/user_guide/general/models.html#loading-a-model
并且
https://www.codeigniter.com/user_guide/general/views.html#loading-multiple-views