下面是database.php文件的代码。
<?php
class Database
{
var $con;
var $db;
var $result;
var $data;
public function connect($server="localhost",$uname="cccsql",$pword="ccc123",$db="trainees_jinal")
{
try
{
$con=mysql_connect($server,$uname,$pword);
if(!$con)
{
throw new Exception("Error: Cannot connect to the server");
return;
}
$db=mysql_select_db($db,$con);
if(!$db)
{
throw new Exception("Error: Cannot connect to the database");
return;
}
return $this;
}
catch(Exception $e)
{
echo $e->getMessage();
}
}
public function insert($sql)
{
try
{
$res=mysql_query($sql);
if(!$res)
throw new Exception("record insertion failed...");
if($res)
{
return mysql_insert_id();
}
}
catch(Exception $e)
{
echo $e->getMessage();
}
}
public function update($sql)
{
try
{
$res=mysql_query($sql);
if(!$res)
throw new Exception("record updation failed...");
return $res;
}
catch(Exception $e)
{
echo $e->getMessage();
}
}
public function delete($sql)
{
try
{
$res=mysql_query($sql);
if(!$res)
throw new Exception("record deletion failed...");
return $res;
}
catch(Exception $e)
{
echo $e->getMessage();
}
}
public function fetchAll($sql)
{
try
{
$res=mysql_query($sql);
if(!$res)
throw new Exception("error on query execution record...");
$arr=array();
while($row=mysql_fetch_assoc($res))
{
array_push($arr,$row);
}
return $arr;
}
catch(Exception $e)
{
echo $e->getMessage();
}
}
public function fetchRow($sql)
{
try
{
$res=mysql_query($sql);
if(!$res)
throw new Exception("error on query execution record...");
if($row=mysql_fetch_array($res))
{
return $row;
}
return NULL;
}
catch(Exception $e)
{
echo $e->getMessage();
}
}
public function num_fields($result)
{
return mysql_num_fields($result);
}
public function field_name($result,$i)
{
return mysql_field_name($result,$i);
}
private function wrap_with_quotes($data)
{
return sprintf('"%s"', $data);
}
?>
现在下面是我的display.php文件代码。
<br/>
<a href="index.php"><button>New Registration</button></a>
<br><br><br/>
<form method="post">
<table width="" border="1" cellspacing="0" cellpadding="" align="center" >
<tr>
<th>Check</th>
<th> ID</th>
<th>Name</th>
<th>Age</th>
<th>Gender</th>
<th>Contact</th>
<th>Email</th>
<th>UserName</th>
<th>Password</th>
<th>Billing Address </th>
<th>Shipping Address </th>
<th>Action</th>
</tr>
<?php
require_once 'database.php';
$database = new Database;
$q="SELECT * FROM personalinfo INNER JOIN addrsinfo ON personalinfo.id=addrsinfo.id";
while($rows=$database->fetchRow($q))
{
?>
<tr>
<td align="center"><input name="checkbox[]" type="checkbox" value="<?php echo $rows['id']; ?>"></td>
<td ><? echo $rows['id']; ?></td>
<td width="40%" nowrap="2"><? echo $rows['name'];?> </td>
<td width="10%"><? echo $rows['age']; ?></td>
<td width="20%"><? echo $rows['gender']; ?></td>
<td width="30%"><? echo $rows['contact']; ?></td>
<td width="30%"><? echo $rows['email']; ?></td>
<td width="30%"><? echo $rows['uname']; ?></td>
<td width="20%"><? echo $rows['paswrd']; ?></td>
<td width="50%"><? echo $rows['billaddr']; ?></td>
<td width="50%"><? echo $rows['shipaddr']; ?></td>
<td><a href="edit.php?id=<?=$rows['id'] ?>">Edit</a></td>
</tr>
<?php }?>
</table>
<tr>
<td>
<input type="submit" name="submit" value="Multi Delete">
</td>
</tr>
<?php
if(isset($_POST['submit']))
{
$checkbox[] = $_POST['checkbox'];
if(sizeof($checkbox[0])>1)
{
$id=implode(",",$checkbox[0]);
$query = "DELETE FROM personalinfo WHERE id IN($id)";
$database->delete($query);
}
else
{
$id=$checkbox[0][0];
$query = "DELETE FROM personalinfo WHERE id='$id'";
$database->delete($query);
}
echo"<script>window.location='display.php';</script>";
}
if(isset($_POST['submit']))
{
$checkbox[] = $_POST['checkbox'];
if(sizeof($checkbox[0])>1)
{
$id=implode(",",$checkbox[0]);
$query = "DELETE FROM addrsinfo WHERE id IN($id)";
$database->delete($query);
}
else
{
$id=$checkbox[0][0];
$query = "DELETE FROM addrsinfo WHERE id='$id'";
$database->delete($query);
}
echo"<script>window.location='display.php';</script>";
}
?>
</form>
</table>
所以我的问题是如何在display.php文件中使用FetchRow和FetchAll方法。我是初学者并尝试用PHP学习OOP。尽快帮助我。
请检查以下代码并帮助我，因为我的循环进入无限模式。
<?php
require_once 'database.php';
$database = new Database;
$database->connect();
$q="SELECT * FROM personalinfo INNER JOIN addrsinfo ON personalinfo.id=addrsinfo.id";
?>
<?php
while($rows=$database->fetchRow($q))
{
?>
<tr>
<td align="center"><input name="checkbox[]" type="checkbox" value="<?php echo $rows['id']; ?>"></td>
<td ><? echo $rows['id']; ?></td>
<td width="40%" nowrap="2"><? echo $rows['name'];?> </td>
<td width="10%"><? echo $rows['age']; ?></td>
<td width="20%"><? echo $rows['gender']; ?></td>
<td width="30%"><? echo $rows['contact']; ?></td>
<td width="30%"><? echo $rows['email']; ?></td>
<td width="30%"><? echo $rows['uname']; ?></td>
<td width="20%"><? echo $rows['paswrd']; ?></td>
<td width="50%"><? echo $rows['billaddr']; ?></td>
<td width="50%"><? echo $rows['shipaddr']; ?></td>
</tr>
<?php }?>
答案 0 :(得分：1)
创建一个实例并使用它，例如：
include "database.php";
$database = new Database();
现在您可以按照您尝试的方式使用它：
$database->fetchRow();
另一种方法是，让您的课程static，以便您可以随时随地调用，而不得不一遍又一遍地实现它。这对数据库类非常有用，因为您通常在整个项目中需要它们。因此，您必须将类中的所有函数和属性设置为静态。之后，您可以像这样调用您的数据库类：
include "database.php";
Database::fetchRow();
此处有更多信息
答案 1 :(得分：0)
在使用mysql fetch查询之前先连接数据库。将以下行添加到$database = new Database;
$database->connect();
答案 2 :(得分：0)
你不能在那段代码上使用..因为fetchall函数会返回一个数组变量..你必须使用“for”循环而不是while .. 创建函数来计算reccord的行号。 然后循环每个数组