abstract:<?php //單例模式:一個類僅允許被實例化一次 /** * */ //僅允許被實例化一次 $db = array( 'host'=>'localhost',//地址 'user'=>'root
<?php //單例模式:一個類僅允許被實例化一次 /** * */ //僅允許被實例化一次 $db = array( 'host'=>'localhost',//地址 'user'=>'root',//數(shù)據(jù)庫用戶名 'password'=>'root',//數(shù)據(jù)庫密碼 'database'=>'ceshi',//數(shù)據(jù)庫名 ) class db { public $conn; public static $sql; public static $instance=null; private function __construct(){ require_once('database.php'); $this->conn = mysqli_connect($db['host'],$db['user'],$db['password']); if(!mysqli_select_db($this->conn,$db['database'])){ echo "失敗"; }; mysqli_query($this->conn,'set names utf8'); } } ?>
Correcting teacher:查無此人Correction time:2019-04-17 09:20:43
Teacher's summary:完成的不錯。php類是核心的知識了,要好好學(xué)習(xí),繼續(xù)加油。