<?php // 假定数据库用户名:root,密码:123456,数据库:RUNOOB $con=mysqli_connect("localhost","root","123456","RUNOOB"); if (mysqli_connect_errno($con)) { echo "连接 MySQL 失败: " . mysqli_connect_error(); } $sql = "SELECT name,url FROM websites ORDER BY alexa;"; if ($result=mysqli_query($con,$sql)) { // 返回记录数 $rowcount=mysqli_num_rows($result); printf("总共返回 %d 行数据。",$rowcount); // 释放结果集 mysqli_free_result($result); } mysqli_close($con); ?>
定义和用法
mysqli_num_rows() 函数返回结果集中行的数量。