PHP learning record_mysql connection

<?php
header("Content-type:text/html;charset=utf-8");
 $host=&#39;127.0.0.1&#39;;
 $user=&#39;root&#39;;
 $pass=&#39;&#39;;
 if($con=mysql_connect($host,$user,$pass)){//连接成功，返回ture，失败：false；
	 echo "连接数据库成功";
 }
 else {
	 echo "连接数据库失败";
 }
 echo "<br/>";
 if(mysql_select_db('wensay')){
	 echo "选择数据库成功";
 }//选择数据库
 else{
	 echo "选择数据库失败";
 }

 mysql_query("set names 'utf-8");//设置当前链接使用的字符编码
 if(mysql_query('insert into test(name)value("abc")')){//insert 成功，返回ture，失败，返回false；
	 echo "插入成功";
 }
 else {
	 echo mysql_errno();
	 echo  "插入失败";
 }
 mysql_close($con);//关闭数据库链接
?>

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