Warning: mysql_fetch_array() expects parameter 1 to be resource, boolean given i
$sql = "select count(uid) as user from user_table where uid='".$this->username."'and password='".md5($this->password,self::USERCONST)."'";
$query = $this->database->setSQL($sql);
if($row = $this->database->select_array($query)){
echo $row["user"];
有问题 查询的结果只有一条记录为什么 不能读呢 如果user==1就证明有这个用户 1以上就重复了
他的输出结果是:
Warning: mysql_fetch_array() expects parameter 1 to be resource, boolean given in F:\wamp\www\user\DB\MySql.php on line 27
请求助
<?phpclass UserEntity{ private $username; private $password; const USERCONST = "Huang520Yu520Hong"; //常量 用户名+常量再加密往数据库里插 private $database; function __construct($u,$p){ include("../DB/MySql.php"); $this->database = new MySql(); $this->username = $u; $this->password = $p; } function register(){ $pmd5 = md5($this->password.self::USERCONST); $sql = "insert into user_table (username,password) values('".$this->username."','".$pmd5."')"; $database->setSQL($sql); } function logout(){ echo "注销"; } function login(){ echo "登录"; } function usercheck(){ //密码加常量 $sql = "select count(uid) as user from user_table where uid='".$this->username."'and password='".md5($this->password,self::USERCONST)."'"; $query = $this->database->setSQL($sql); if($row = $this->database->select_array($query)){ echo $row["user"]; } }}?><?php class MySql{ private $host; private $username; private $password; private $database; function __construct(){ $this->host = "localhost"; $this->username = "root"; $this->password = ""; $this->database = "bkqs"; $this->mysqlconnection(); } function mysqlconnection(){ $connection = mysql_connect($this->host,$this->username,$this->password) or die ("连接数据库失败"); mysql_select_db($this->database,$connection) or die ("打开数据库失败"); mysql_query("set names 'GBK'"); } function setSQL($sql){ return mysql_query($sql); } function select_array($query){ return mysql_fetch_array($query); } function select_object($query){ return mysql_fetch_object($query); } function close(){ return mysql_close(); } }?>