<?php $DB_HOST = ""; $DB_USER = ""; $DB_PASSWORD = ""; $DB_DATABASE = ""; define("DB_HOST", "localhost"); define("DB_USER", "root"); define("DB_PASSWORD", "1234"); define("DB_DATABASE", "t6_db_hp");class mysqldb { var $host = DB_HOST; //localhost var $user = DB_USER; //root var $pass = DB_PASSWORD; //1234 var $database = DB_DATABASE; //t6_db_hp var $conn; var $sql; var $n = 0; var $m = 0; var $result = ""; var $debug = false; var $err = "";function mysqldb($host="", $user="", $pass="", $database="") { if ($host != "") $this -> host = $host; if ($user != "") $this -> user = $user; if ($pass != "") $this -> pass = $pass; if ($database != "") $this -> database = $database; if (!$this -> conn = @mysqli_connect($this -> host, $this -> user, $this -> pass)) { return $this -> output("连接数据库 '".$this -> host."' 失败。".mysqli_error($this -> conn)); } mysqli_query($this -> conn,"SET NAMES 'utf8'"); $this -> selectdb(); }function selectdb($database="") { if ($database != "" && $database != $this -> database) $this -> database = $database; if (!mysqli_select_db($this -> conn, $this -> database)) { return $this -> output("无法使用数据库 '".$this -> database."'。"); } }function query($sql="", $database="") //$sql { if ($sql != "") $this -> sql = $sql; if ($database != "" && $database != $this -> database) { $olddb = $this -> database; $this -> selectdb($database); } $this -> result = @mysqli_query($this -> conn,$this -> sql); if (mysqli_error($this -> conn) != "") { return $this -> output("执行以下SQL语句时失败:'".$this -> sql."' <br><br>".mysqli_error($this -> conn)); } $this -> n = @mysqli_affected_rows($this -> conn); if (!empty($olddb)) $this -> selectdb($olddb); return $this -> result; }function get_data() { /* if(!$this -> result || !preg_match("/^Resource/i", $this -> result)){ */ if(!$this -> result || !is_resource($this->result)){ return $this->output("没有数据,请先执行SQL的'select'语句!"); } $count=0; $this -> m = @mysqli_num_rows($this -> result); if ($this -> m > 0) { while ($row = mysqli_fetch_array($this -> result)) { $data[$count] = $row; $count++; } return $this->result=$data; } else { return $this -> output("数据为空!"); } mysqli_free_result($this -> result); }function output($msg){ $this->err=$msg; if ($this->debug)echo $msg; return false;} }?><?php /*?>////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////<?php */?><?php$db = new mysqldb();if($db){ echo "链接数据库 1"; echo "<br/>"; echo "<br/>"; } $sql = "SELECT * FROM t6_dept where de_id>'0' ORDER BY de_id ASC"; $db -> query($sql); $result = $db -> get_data(); if(!$result) { echo "取出数据失败result 0"; echo "<br/>"; echo "<br/>"; }echo $result[0]["de_name"]; //无法显示数据print_r($db);?>
ディスカッションに返信 (解決策)
mysqli_query($this -> conn,$this -> sql) は、リソース (リソース) ではなく、mysqli_result オブジェクトを返します
変更するにはどうすればよいですか? ? ?
if(!$this ->result || !is_object($this->result)){
if(!$this -> result || !is_object($this-> result)){ using using ' using 'select' using ' を使用して SQL の 'select' ステートメントを最初に実行します。 ;
}