php操作mysql数据库的基本类

偶尔要用到php做一些mysql数据库的操作测试,自己写起来太麻烦,搜索的结果一般都又包含一大堆没用的代码,这里将php mysql的操作做一下总结,希望以后用到的时候不用再感到麻烦了,代码如下:

<?php
$dbhost = &#39;localhost&#39;;
$dbuser = &#39;root&#39;;
$dbpass = &#39;123456&#39;;
$dbname = &#39;products&#39;;
$connect = mysql_connect($dbhost, $dbuser, $dbpass);
if (!$connect) exit(&#39;数据库连接失败！&#39;);
mysql_select_db($dbname, $connect);
mysql_query(&#39;set names utf8&#39;);
//查询
$sql = "SELECT * FROM `category`";
$result = mysql_query($sql);
while ($row = mysql_fetch_array($result)) {
    echo $row[&#39;id&#39;];
}
//插入
$sql = "INSERT INTO `category` (`id`,`name`) VALUES (NULL,&#39;" . $name . "&#39;)";
$result = mysql_query($sql);
if (mysql_affected_rows()) {
    echo &#39;插入成功，插入ID为：&#39;, mysql_insert_id();
} else {
    echo &#39;插入失败：&#39;, mysql_error();
}
//修改
$sql = "UPDATE `category` SET `name`=&#39;" . $name . "&#39; WHERE `id`=&#39;" . $id . "&#39;"; //开源代码phprm.com
$result = mysql_query($sql);
if (mysql_affected_rows()) {
    echo &#39;修改成功！&#39;;
}
//删除
$sql = "DELETE FROM `category` WHERE `id`=&#39;" . $id . "&#39;";
$result = mysql_query($sql);
if (mysql_affected_rows()) {
    echo &#39;删除成功！&#39;;
}
//关闭连接
mysql_close($connect);

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