php如何转义mysql中的特殊字符

mysqli_real_escape_string(connection,escapestring);

<?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(); 
} 

mysqli_query($con,"CREATE TABLE websites2 LIKE websites");

$newname="菜鸟'教程";

// 没有转义 $newname 中特殊字符，执行失败
mysqli_query($con,"INSERT into websites2 (name) VALUES ('$newname')");

// 转义特殊字符
$newpers=mysqli_real_escape_string($con,$newname);

// 转义后插入，执行成功
mysqli_query($con,"INSERT into websites2 (name) VALUES ('$newpers')");

mysqli_close($con);
?>