After configuring the PHP environment, we will officially start operating the database! The first is to read the data in MySQL. Remember how we connected to the MySQL database before?
<?php header("Content-type:text/html;charset=utf-8");//字符编码设置 $servername = "localhost"; $username = "root"; $password = "root"; $dbname = "web"; // 创建连接 $con =mysqli_connect($servername, $username, $password, $dbname); // 检测连接 $sql = "SELECT * FROM users"; $result = mysqli_query($con,$sql); if (!$result) { printf("Error: %s\n", mysqli_error($con)); exit(); } $jarr = array(); while ($rows=mysqli_fetch_array($result,MYSQL_ASSOC)){ $count=count($rows);//不能在循环语句中,由于每次删除 row数组长度都减小 for($i=0;$i<$count;$i++){ unset($rows[$i]);//删除冗余数据 } array_push($jarr,$rows); } echo $str=json_encode($jarr);//将数组进行json编码 ?
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