php+mysql オブジェクト指向の追加、削除、変更、クエリ

初心者なので、ご指導お願いします。

<?php//   Mysql_class.phpclass Mysql{    private $localhost;    private $root;    private $password;	public  $database;     public function __construct($localhost,$root,$password,$database){			//让下面的方式中，若要用到$localhost 变量		$this->localhost = $localhost;											//就用$this->localhost 代替。 		$this->root 	 = $root;		$this->password  = $password;		$this->database  = $database;    }		public function Connect(){		mysql_connect	($this->localhost,$this-root,$this->password);		mysql_select_db ($this->database);		mysql_query 	("set names utf8");	}		public function Close(){		mysql_close();	}			public function myarray($result){					//形参		return mysql_fetch_array($result);	}		public function myquery($sql){		return @mysql_query($sql);	}		public function myrows($result){		return mysql_num_rows($result);	}			public function myselect($users){		return $this->myquery("select * from $users");	}}$db = new Mysql("localhost","root","","stu_system");

<center><table cellpadding="18">	<tr>		<th>id</th>		<th>name</th>		<th>sex</th>		<th>phone</th>	</tr><?php    include_once "mysql_class.php";	    $result = $db->myselect("users");	if(is_array($result)){	while($row=$db->myarray($result)){?>		<tr>		<td width="8%" align="center"> <?php echo $row['id'] 	 ?></td>		<td width="18%" align="center"><?php echo $row['name'] 	 ?></td>		<td width="8%" align="center"> <?php echo $row['sex'] 	 ?></td>		<td width="18%" align="center"><?php echo $row['phone']  ?></td>		<td>			<a href="modify.php?	id   = <?php echo $row['id']  ?>&									name = <?php echo $row['name']?>&									sex  = <?php echo $row['sex'] ?>&									phone= <?php echo $row['phone'] ?>">  修改</a>         <!--   ?什么意思  为GET传输方式-->			<a href="delete.php?	id   = <?php echo $row['id']  ?>">	  删除</a>		</td>	</tr></table></center><?php	}	}	else echo"no result";	mysql_close();?>

リソースが入手できず、問題が見つかりません。

ディスカッションへの返信(解決策)

if(is_array($result)){ この判断には問題があります。

$result は配列ではなくリソースである必要があります
ブール値 false の var_dump(is_array($result)); が可能です。

次のように変更します: if($db->myrows($result)>0){

Connect メソッドは実行されません
myquery メソッドは実行されません

myselect メソッドはリソースを返します

Connect メソッドは実行されません
なし myquery メソッドの実行

myselect メソッドはリソースを返します

上記と同じ

<?phpclass Mysql{    private $localhost;    private $root;    private $password;    public  $database;    private $link;    private $res;      public function __construct($localhost,$root,$password,$database){            //让下面的方式中，若要用到$localhost 变量        $this->localhost = $localhost;                                            //就用$this->localhost 代替。         $this->root      = $root;        $this->password  = $password;        $this->database  = $database;            }         public function Connect(){        $this->link = mysql_connect($this->localhost, $this->root, $this->password);        mysql_select_db ($this->database, $this->link );        mysql_query     ("set names utf8");    }         public function Close(){        mysql_close();    }              public function myarray($result){                    //形参        return mysql_fetch_array($result);    }         public function myquery($sql){        $this->res = mysql_query($sql) or die (mysql_error());        return $this->res;    }         public function myrows($result){        return mysql_num_rows($result);    }              public function myselect($users){        return $this->myquery("select * from $users");    }} $db = new Mysql("localhost","root","","stu_system");$db->Connect();<center><table cellpadding="18">    <tr>        <th>id</th>        <th>name</th>        <th>sex</th>        <th>phone</th>    </tr><?php    include_once "mysql_class.php";    $result = $db->myselect("users");    while($row=$db->myarray($result)){?>       <tr>        <td width="8%" align="center"> <?php echo $row['id']      ?></td>        <td width="18%" align="center"><?php echo $row['name']      ?></td>        <td width="8%" align="center"> <?php echo $row['sex']      ?></td>        <td width="18%" align="center"><?php echo $row['phone']  ?></td>        <td>            <a href="modify.php?    id   = <?php echo $row['id']  ?>&                                    name = <?php echo $row['name']?>&                                    sex  = <?php echo $row['sex'] ?>&                                    phone= <?php echo $row['phone'] ?>">  修改</a>         <!--   ?什么意思  为GET传输方式-->            <a href="delete.php?    id   = <?php echo $row['id']  ?>">      删除</a>        </td>    </tr></table></center><?php    }    mysql_close();